Signal Lamps,The Ultimate Guide

Signal Lamps,The Ultimate Guide

Signal lamps, also known as indicator lamps or Morse lamps, are devices used to display or communicate certain signals. The term is generalized to refer to various lamps and light sources. It originally referred to light sources used for communication, relaying specific information in pulsating flashes.

These can be seen over long distances and were often utilized by the military in what is known as the Morse Code.

Why FILN is Expert in LED Pilot Light Manufacturing

FILN has its own production factory, so there is no MOQ, even if you only need one FILN, it can be produced for you. You can place a sample order first to see the quality of our Signal Lamps. We also do factory OEM. This means that we understand the needs of our client’s regional market, you can discuss your market direction with us and we will provide you with useful advice.

With nearly 20 years of experience in making Signal Lamps, FILN has always been one of the best manufacturers in China. We offer the highest range of Signal Lamps at the highest quality and competitive prices.

Our Signal Lamps have passed CCC, American UL, European CE, CB, ROHS environmental certification, IP67 and other certifications. This means you will have Signal Lamps with guaranteed quality.

Indicator light accessories

What are Signal Lamps?

Also known as Aldis lamps (named after Arthur Cyril Webb Aldis, the inventor), these visually indicate units used in wireless signals to communicate. They are used in modes of signal light communication known as the Morse code.

The present models are engineered to generate pulsating lights, accomplished by adjusting the shutters fixed at the front of the lamp. You can adjust these mechanically or automate them using a pressure valve or tilting a concave mirror.

BMW 335i Indicator Warning Lights LED Rear Window Defrost Indicator Light

10mm 48v led plastic signal indicator light lamp

Parameters of signal lights

Various indicator lamps are used in optical signals, each with a distinct role and signaling meaning. Here are some of the characteristics:

Color and Light Output

Different lamps or indicators have distinct light patterns (characteristics). This can be seen clearly at sea, where mariners communicate and navigate using various light signals. One has to learn and familiarize themselves with the specific sequences and different colors displayed in each signal.

These vary from one area of use to the next, making learning the specific signaling language even more critical. Mariners also have to be particular about selecting the proper signal light.

The following light patterns are possible, these being:

  • Alternating
  • Blinking (flashing lighting)
  • Continuous (fixed lighting)
  • Isophase
  • Morse code
  • Multicolored
  • Occulting
  • Quick lighting
  • Rotating
  • Strobe lights

The most commonly used lighting in maritime applications is the fixed lights, which give mariners positional data and signals about harbors and ports. Normally, colors are used to communicate, usually green and red.

Different signals can operate at relatively low output levels, such as millicandela, whereas others require significantly more light. Additionally, several colors combinations are possible and are frequently appropriate for application in communication under various conditions, such as:

  • Green equals “all good”
  • Orange/ red equals technical difficulties

More modern models also use blue signals now that technology has allowed blue-emitting light-emitting diodes. However, because that shade is relatively new, not everyone understands the message communicated by that color choice.


Emission can be diffuse or directional, with the former being more common. In diffuse emission, the light is emitted in multiple directions, allowing them to be visibly seen from various angles.

However, directional emission signals are often useful when observing from a greater distance but can only spread in a limited number of directions.


Engineers design these signal lights for durability by constructing them from quality materials to ensure they remain viable for as long as possible. This helps save the costs of repairs and replacement by installing quality lamps. Another consideration is dependability, which weighs extreme importance in security and overall safety.

Think of it this way: if the turn signal lights are faulty and start to blink, there might be accidents on the road. A malfunction may communicate the wrong message to mariners with navy signal lamps. Photodetectors are often required to observe the lamps’ operation, though drive currents can also be monitored for the same reason.

Most incandescent lights rely on low power and lower filament heat. This reduces overall efficiency significantly and allows the bulbs to last longer than those used in residential settings.

Learn more about the Waterproof Rocker Switch


How Many Types of Signal Lamps?

To suit the various applications for optical signaling, engineers designed various types of signal lights.

Here are some of the different types:

  • Continuous Light
  • Flashing Beacons
  • Multifunctional Beacons
  • Rotating Beacons
  • Strobe Lights

They also come in panel or surface-mounted configurations.

white-led-metal-car-signal-lamp-pilot-light (1)

Strobe lights

Strobe lights emit light in quick succession (milliseconds) and arguably have the best signal effects. This makes them useful in the latest security systems when paired with audio signaling devices. It’s tailored to play into the fact that human eyes are wired to follow any movement within their field of vision.

You can also effectively detect any warnings from strobe light signals, thanks to reflection. They’re often applied in situations that need immediate alerts for pending danger. Also, they can be found in special motor vehicles like the ones used in mining, and construction, among other things.

Strobe lights are available in LED and Xenon bulbs and come in various colors, including blue, clear, green, and the most popular, orange and red.

Learn more about the Push Button Switch


Flashing Beacon

Flashing lamps draw the most attention of all signal lights since the flashing motion is quick and conspicuous and can be picked up from any field of view. These light up at rhythmic intervals, emitting a blinking signal, and it is this uniform flashing helps draw attention.

Unlike strobe lights, these aren’t often used in emergencies as warning lights but will be applied where it’s essential to have clear, visible light.

They also come in various colors, including clear, blue, red, green, yellow, and orange. Also, you can refer to your signals category for colors to decide which one to use. You can get them in LED and halogen lamps.

They’re often combined with an audio signal, available in various designs, and can be manually controlled to boost effectiveness and visibility.


Rotating Beacon

These beacons emit signals with complete rotation (360 degrees) ranges, revolving around like a lighthouse. Often, you’ll find these in an emergency (red or blue in ambulances and police cars) or unique (orange in large vehicles with bulky cargo) motor lighting.

Because of its flexible construction, the signal is conspicuous from any angle. One of the common applications is in alarm systems, serving as a warning when there’s a looming danger. The most popular is the rotating mirror beacon.

In road traffic, these come in three colors:

  • Yellow rotating lights to indicate danger in tow trucks or lifting platforms
  • Blue rotating lights in emergency cars like fire trucks or rescue vehicles
  • Red and green rotating lights (prohibited in some countries)

Learn more about the Custom Indicator Light

10mm-0.39inch-12V-plastic-led-signal-lampFL1P-10NW-4 (1)

Continuous light

Continuous or steady beacons produce permanent signals without flashing or breaking or any other pattern. They’re least likely to garner attention and are often utilized in announcing the status of a machine or application.

The most common colors are red and green (normal), as used in signal lights for cars. They’re available in various lighting technologies, including halogen, incandescent lamps, and LED.


Multifunction beacon

Similar to rotating beacons, multifunctional models are available in the R series of the Auer Signal in two types of performance categories. Their models in Standard Performance come furnished with 6×6 LED lights, while those in High Performance have 6×12 LEDs.

LED technology offers an advantage where these models come in the same size but present two different performance categories, owing to the LED’s advanced innovation.

BMW 335i Indicator Warning Lights LED Rear Window Defrost Indicator Light


Navy signal lamp

One of the most common applications of signal light symbols is in the navies. Navy signal lights are key in communicating radio silent missions and operations where marines aren’t too far from each other. That way, they can signal to each other using Morse code. The latest models enable the passing of pre-written template messages.

LED Pilot LightThe Ultimate Guide


What’s the difference between signaling and indicator devices?

You’re less likely to come across signal lights in factories and manufacturing plants as these frequently require bright beams. This is because they offer updates and warnings.

On the other hand, optical signals can illuminate all sorts of spaces.

Signal LightThe Ultimate Guide

What’s the voltage of a signal lamp?

The voltage differs but, on average, ranges from 5÷10 V AC/DC to 10÷130 V AC/DC.

Normally, the drive voltage influences the various solutions that can be applied. On average, glow lamps are used for high voltages, while LEDs are applied at lower voltages or use incandescent lamps.

Learn more about the Waterproof Rocker Switch

How long do LEDs last?

One of the most impressive qualities of LEDs is their durability and estimated life expectancy, ranging from 20,000 to 50,000 hours in total. If these lamps are used for eight hours a day, they can be viable for 17 years. This life span is almost thirty times longer than that of incandescent lamps.

How to connect the wire with the LED indicator lights?


Signal lamps have a range of applications and come in various ranges and colors. As devices used for communicating signals via light sources, they need to be understood and identified accurately to know what they mean.

Understanding the various types and how they work is the best way to know which will work for you, whether for automotive signal lights or marine purposes.

Learn more about the Custom Indicator Light

Signal Light,The Ultimate Guide

signal light

FILN is pleased to continue to provide you with the highest quality signal light indicators products. We always ensure our good reputation in the supply industry by supplying our customers with quality and useful LED light indicators and other light indicator related products.

The high-quality signal light indicator provided by FILN is made of high-quality PC material and can withstand high temperature up to 180 degrees Celsius. It has good impact resistance, thermal deformation resistance, good weather resistance and high hardness, which can ensure that your light indicator product is successfully obtained.

Why FILN is Expert in LED Pilot Light Manufacturing

You can choose the type of light indicator you want. We, FILN, as your partner, are willing to guide you in the selection of products until your order is processed.

FILN is a reputable firm with highly skilled professionals designing and manufacturing ight indicator using cutting-edge approaches and methods.

As the No.1 signal light supplier in China, dealing with signal light, FILN also manufactures other products such as Automotive turn signal lights, signal lamps and POLOT LIGHT. We have various samples of these types. Of course, we welcome OEM and ODM. This means that if you need a specially designed signal light product, please feel free to contact us, we have a professional team at your service.

Indicator light accessories

What is A Signal Light?

The signal light indicator is a device used to communicate with other drivers. It provides information about the driver’s intention and helps others take appropriate action.

Normally, these signal light LEDs can be found on all vehicles that are driven on public roads and fall into two categories:

  • Automotive turn signal lights
  • Traffic lights

The first signal light car was introduced in the late 1800s, and they were used to indicate the direction of traffic. These days, they also show if a vehicle is turning left or right, has its hazard lights on, or indicates a right turn by flashing its right-hand indicator.

A big part of being a safe driver is being able to inform other motorists of your intentions. Signaling lights are both at the frontal and rear part of the vehicle and are sometimes also called “blinkers” and “signal light indicators.” Depending on the side you flicked on, your car will indicate whether you’re turning left or right.

BMW 335i Indicator Warning Lights LED Rear Window Defrost Indicator Light

12.5mm signal indicator light

Automotive Turn Signal Lights

Drivers are expected to understand and use the signaling lights in cars. Despite some people’s rather lax response to using signaling or indicating lights, most states have laws requiring citizens to uphold this. Most people report that the last time they ever used their indication lights was during their driving test.

This endangers both themselves and other drivers and pedestrians on the streets. They’re specially engineered to assist drivers in moving smoothly on the road to signal to other motorists. Failure to communicate with other motorists often ends in accidents.

1. Braking lights

You’ll find these at the back of your car, and they’re important in alerting other motorists when you slow down or stop your car. These are only activated when you press your brakes, so you won’t have to stress about abusing them.

2. Daytime running lights

These are the automated lights at the back and front of your vehicle that come independently. In some cars, drivers can turn these off manually. They’re intended to increase your visibility to other motorists, though they can become distracting with oncoming traffic.

3. Fog lights

As the name suggests, fog lights are useful on foggy days when you need to break through the fog to shine and help other cars see you. They’re typically found near the headlights and only need to be accessed when normal lights are ineffective due to fog.

4. Hazards

Also found at both ends of a car, these lights are also called flashers and, when activated, help emit a flashing rhythm to alert drivers when there’s an emergency. This could be an issue with your car or a warning of impending danger ahead, and they’re not to be abused when illegally parking or stopping.

5. Headlights

These can be classified into low and high-beam lights and are important in helping drivers get a clear view of wide roads while also alerting others of the vehicle’s presence. While low beams produce only sufficient lighting without disturbing other motorists with blinding lights, high beams have more dazzling glares.

Ideally, high beams are designed to produce intense glares that illuminate larger spaces, usefully when driving on wide, open roads without other drivers. Make sure to turn them off when you come close to other cars.

6. Signal lights

To promptly alert other motorists, signal light LEDs are found on both ends of the vehicle and are also known as “blinkers.” They’re used to communicate to other drivers if you’ll be turning or switching lanes.

7. Taillights

Every car has red lights at the back that get illuminated as your headlights come on. These benefit drivers following you closely to better gauge the distance between the two of you.

Learn more about the Waterproof Rocker Switch

Induction cooker signal light

Traffic Lights

Traffic signals, or stop lights as they’re sometimes called, are electrical devices that help regulate traffic going in different directions at an intersection or junction. They visually indicate which side of motorists is allowed to move at any given time, letting them know when to go, slow down, or stop. Sometimes they also alert motorists when it is safe to turn.

Depending on the specific engineering, they can be manually controlled or rely on a timer that enables traffic flow in a specific direction for set periods in a repeated cycle. In more advanced models, these may be controlled by advanced digital control systems that constantly reconfigure the changing sequence based on specific timing (heavy traffic in the early morning).

Traffic engineers rely on these to reduce congestion and traffic jams, keeping drivers and pedestrians safe. At intersections, traffic lights appear in clusters of changing red, amber, and green lights, signaling to stop, proceed with caution, and go consecutively.

When used appropriately, they help fulfill several purposes:

  • Ensure a steady traffic flow: These help control traffic volumes and ensure orderly movement in the respective lanes.
  • Keep everyone safe: Traffic lights are designed for adherence by everyone, from drivers to cyclists and pedestrians, to keep everyone safe when interacting on the road, whether at cross junctions or crosswalks.
  • Reduce the frequency of accidents: There are fewer chances of accidents occurring with orderly movement on the road.


The traffic lights are made up of various important parts, including:

  • The body – is often constructed from rust-resistant aluminum or treated synthetic material.
  • Individual lens – with a tinted, clear cover.
  • Bulbs or lamps – constructed for durability and responsible for the different colors displayed.
  • A hood/ visor – separates the three different bulbs and helps direct the beam forward, forming the three-light signal stack.
  • Supporting arms – are made from durable material.
  • Controller – found in strong steel enclosures containing switches, timers, and relays.
10mm 48v led plastic signal indicator light lamp

Are signal lights LED on cars better?

A huge advantage of a signal light LED is how fast they come on – one-fifth of a second faster than other bulbs (incandescent). While that doesn’t seem significant, when moving fast, you need signals that respond fast to give other drivers enough time to respond and prevent an accident.

Learn more about the Push Button Switch

Are traffic lights LED?

While not all existing traffic lights are made from LEDs, most places have started to replace them with these more efficient types. These are more efficient, durable, and brighter than traditional incandescent halogen lights used in traffic bulbs. Because of their small size, they’re often used in bunches.


Are LEDs safe?

Modern LED lights are not only innovative but safe for use. Because they are UV rays-free, they’re not a risk to your eyes, as seen in their use in various therapies. They’re also toxin-free and can be easily recycled, making them a green option.

Another impressive innovation is how they adjust to the time of day, making them the best solution for bedroom lights as they’re not too bright!


Signal lights are essential for every motorist’s safety. With consistent use, they prove very effective and help you communicate your intentions while on the road to other motorists, whether you want to switch lanes, turn, or pull over. While often neglected by some drivers, these are crucial in helping reduce accidents and road rage.

Learn more about the Custom Indicator Light

LED Pilot Light

LED Pilot Light

The appliances we use every day at home or in our business establishments consist of several essential components. These components are also made up of smaller devices and parts that are carefully assembled to allow our appliances’ smooth and accurate operation.

One of the smaller devices that make up the components of the machines we use is the LED pilot light. It is one of the most reliable indications of whether a certain device operates well. Let’s define these lights, applications, benefits, specifications, etc.

Why FILN is Expert in LED Pilot Light Manufacturing

FILN is an expert in making LED Pilot Light products. We supply many successful businesses around the world. You can be one of them, we will provide you with no MOQ, and each product will go through multiple inspections before leaving the factory, which means we will provide you with reliable LED Pilot Light products. FILN has CCC, UL, CE, CB, ROHS environmental certification, IP67 and other industry certificates, you will get the endorsement of these standards, providing a strong guarantee for the development of your business.

FILN is a trusted company of trained experts and professionals manufacturing and producing communication equipment through innovative processes and techniques.

Indicator light accessories

What is a LED pilot light?

Also known as indicator lights or panel indicators, these small lights help indicate whether a certain device or machine is functioning well. For instance, the red light you see on devices when you power them on is an example of an indicator light.

While its function is basic and simple, what these lights signal homeowners is essential because they help detect certain malfunctions in an appliance. Additionally, even though these lights are mainly for panel usage, they can still be installed in various locations.

John Deere Indicator Light Codes LED Power Symbol Indicator

panel indicator light

Application of LED Pilot Light

Indicator lights are widely used in different sectors, but their most important applications are household appliances, especially machines involved in food processing, cooking, and washing. Additionally, they are widely used in the hotel, restaurant, and cafe industries, including professional coffee machines.

These panel indicators are also involved in the following sectors:

  • Lighting technology
  • HVAC sector
  • Wiring and switchgear systems
  • Medical machinery sector
  • Spare parts

Since these applications belong to various industries, each indicator light must follow certain requirements, depending on what sector it will operate in. For instance, the Ho.Re.Ca industry requires the lights to have good aesthetic and design components aside from safety and functionality.
On the other hand, the HVAC sector requires the lights to have strict technical characteristics, including temperature resistance, light intensity, and proper resistance to aggressive agents or shocks.

A special type of indicator, a vandal-proof indicator, is used in challenging operating conditions. This special light device consists of a metal body equipped with an o-ring that helps to provide high resistance to mechanical and chemical stresses.

How to Wire a Push Button Switch?

12V LED Pilot Indicator Light

Features and Design

LED pilot lights were created to allow their maximum function in various industries, especially for home appliances.

The following are the key features of these essential light devices:

  • Viewable under direct sunlight
  • Visible from various directions
  • Ultra-bright LED ensures accurate recognition and high visibility
  • Prevents electrical shocks with finger protection of IP20
  • Compliant with EN standards
  • c-UL and UL listed
  • Lenses come in clear and colored variants

Moreover, panel indicators are designed to display a machine’s operating status, so the small light they emit must always be visible, especially from the outside. The light’s color will determine the actual application’s status, allowing end-users to understand and use it easily.


The Parts of LED Pilot Light

LED panel indicator lights consist of four parts:

  • Lens or diffuser
  • Light source
  • Plastic support
  • Connection

You will see the lens or diffuser on the front. It’s commonly made of polysulfone, polycarbonate, or nylon, allowing proper light diffusion. When light is diffused, the effect ranges from a simple signal, a spotlight, or a certain lighting function, depending on the indicator light’s application.

The light source serves as the indicator’s main component and is commonly made up of either an LED or a lamp. On the other hand, the body of the panel indicator, or the plastic support, is made of plastic or metal, depending on the device’s application.

You can choose from various polymers when choosing a plastic body, considering temperature resistance and technical performance. Finally, the connection is exactly where the indicator contacts the final application. Generally, it occurs through silicone-glass, silicone, PVC electrical cables, or quick-connect metal terminals.

Learn more about the Push Button Switch

LED Indicator Specifications

The following are the technical specifications of LED pilot lights:

  • Operating Temperature: -25 to 55 degrees Celsius, no freezing
  • Storage temperature: -45 to 80 degrees Celsius
  • Insulation Resistance: 100MΩ (DC500V megger)
  • Operating Humidity: 45-85%RH
  • Impulse Dielectric Strength: 2.5kV
  • Overvoltage Category: II
  • Shock Resistance Operating Limit: 100m/s2
  • Vibration Resistance Operating Limit: 5-55Hz
  • Protection Degree: Panel front: IP66 (IEC 60529), UL Type 4X Terminals: IP20
  • Terminal Size: M3.5 screw

LED panel indicator lights Benefits

Indicator lights have durable designs and construction, allowing easy installation and applications in various locations. Additionally, these lights are solid-state, so you can expect them to last long without replacing them at once.

Because they use LEDs as the light source, you don’t need to keep replacement bulbs in stock. Additionally, you are assured that the light intensity and degree of brightness will not diminish over time. LEDs can also function even in different temperature states and resist various weather conditions.

Other outstanding benefits of LED indicator lights are their durability and longevity because of their vibration resistance. Unlike LED, incandescent bulbs have small filaments easily damaged or affected by shock. A LED light source does not have filaments because it’s solid-state, prolonging its efficiency and effectiveness.

Moreover, LEDs are safer because they produce less heat and can run cooler than traditional incandescent bulbs. Finally, you are guaranteed better efficiency with LED panel indicators, draining less battery life. These lights are also corrosion-resistant, unlike incandescent bulbs that can overheat and corrode in the socket or bulb base.

Safety Precautions for Using LED Indicators

LED indicator lights should be handled with care and safety to avoid damaging the entire machine they operate in.

Take note of the following safety precautions:

1. The power should always be turned off before installation, maintenance, removal, cleaning, and inspection. Not turning the power off can lead to fire hazards or electrical shock

2. For wiring maintenance, ensure that you use properly-sized wires, AWG16 to AWG1f, to meet current and voltage requirements.

3. You should tighten all terminal screws depending on their recommended tightening torque of 1.0Nm. Loose terminal screws can lead to fire and overheating.

Learn more about the Custom Indicator Light

Installation Process of LED Indicator Lights

During panel mounting, disassemble the locking ring from the entire device and check whether the rubber gasket is in proper alignment. After inspecting, insert one AP22M unit, ensuring that the “Top” mark is aligned with the recess directly into the panel’s cut-out. Turn the locking ring and tighten it after.

When installing the indicator light inside the panel’s cut-out, use a locking ring wrench. The wrench will allow the locking ring to be tightened to the torque needed of 2.0Nm. Avoid over-tightening with pliers, or you can risk damaging the entire unit.

BMW 335i Indicator Warning Lights LED Rear Window Defrost Indicator Light

8mm 6V red green double color led metal pilot indicator light

What is the difference between the indicator and warning lights?

Indicators and warning lights present subtle differences. Warning lights are more commonly used as emergency signals, either static or flashing emergency lights. The light source is commonly a flashing LED striking red for flashing lights. On the other hand, the light source for static has a higher intensity so that it can be seen even at far distances from a control panel.

Learn more about the Waterproof Rocker Switch

What colors does the indicator pilot light have?

The colors of indicator pilot lights have various meanings:

  • Red: possible danger or malfunction must be attended to immediately
  • Yellow: state changes
  • Green: safe operating status
  • Blue: special instructions
  • White: general signals

How to connect the wire with the LED indicator lights?


What is the required voltage for LED indicator lights for cars?

The common LED indicator lights for cars only require 2 volts to function. With this, the LED pilot light 120V should be reduced to 2 volts by a resistor.

The Best Selling Rocker Switch is KCD4


A LED pilot light may be a small device, but its functions work wonders to ensure that your appliances and other machines are working in prime condition. These lights serve as signals to tell you whether a certain device needs repair, preventing further damage that can lead to your appliances overheating and breaking down.

micro push button switch

micro push button switch

The micro push button switch is a switch widely used in electronic, electrical, aviation, aerospace and mechanical electrical equipment for automatic control. This switch is composed of two micro switches and a bracket part, so that two sets of circuits can be turned on or off at the same time in the automatic control circuit.

As a factory with more than 15 years of experience in the design and production of micro push button switch, FILN can provide you with customized services, including product light color, voltage, light brightness, etc. At the same time, FILN is also a factory with CCC, American UL, European CE, CB, ROHS environmental certification, IP67 and other standards, which means that you will get a high-quality standard micro push button switch.

The main technical performance indicators of micro push button switch:

Rated load 30Vd∙c∙‚ 1A;
Contact resistance ≤0∙02Ω;
Insulation resistance ≥1 000MΩ;
Dielectric strength 250V;
Action stroke ≤2mm;
Life 10000 times.

Indicator light accessories

What is a micro push button switch?

The micro push button switch is composed of a micro switch, a bracket, a sleeve, a handle, a nut, an elastic washer, a rivet, etc. The micro switch is composed of a button, a positioning card, a shell, a moving contact piece, a long conductive part, and a short conductive part. , compression spring, base, tension spring and other parts.

The micro push button switch is composed of two micro switches fixed on the bracket part with rivets.

A sleeve is riveted on the bracket, and the switch nut can be fixed on the mounting plate by using the thread on the sleeve. A sliding handle is installed in the casing, and the stepped plane at the lower end of the handle is close to the top of the button of the micro switch.

The button is press-fitted on the upper end of the positioning card, and a symmetrical “V”-shaped groove is set in the middle of the positioning card. Relying on the tension of the tension spring, one end of a pair of movable contact pieces is pressed against the “V”-shaped groove. “The other end is pressed against the bent plane of the short conductive piece installed in the base. A pair of long conductive parts and a pair of short conductive parts are respectively inserted into the four grooves of the base, and the lower end of the positioning card is inserted into the guide groove of the base and is in close contact with the compression spring.

In the case of normal non-action, under the action of the tension spring, the two R arc surfaces of the moving contact piece are always pressed against the bending planes of the two short conductive parts, so that the pair of short conductive parts is always in a constant state. in the open state;

When pressing the handle, rely on the stepped plane at the lower end of the handle to simultaneously press down the buttons on the two micro switches, push the positioning card to move downward, compress the compression spring, and the bevel of the moving contact piece is positioned Under the action of the “V”-shaped groove on the card, “its R arc end both slides and rotates. At the moment when the “V”-shaped groove moves to exceed the force center position of the tension spring, the movable contact piece is under the tension of the tension spring. Under the action of the “V”-shaped groove of the positioning card, it rotates upwards and contacts the long conductive member, so that the long conductive member is in a connected working state, and the normally on state of the short conductive member is disconnected.

When the external force is removed from the handle, under the pressure of the compression spring in the base, the positioning card moves upward. At the moment when the position of the “V”-shaped groove exceeds the force center position of the tension spring, at the moment when the tension of the tension spring is Under the action, “the contact piece rotates downward around the “V”-shaped groove of the positioning card, and contacts the two short conductive parts, “disconnecting the contact with the long conductive parts”, and at the same time, the button moves upward, and the handle is pushed up. The top‚ switch is restored to its original state.

Learn about the LED Indicator Light

Electrical Push Button Switch

What is the structure of the micro push button switch?

Poor conversion synchronization

Pushbutton Switches

The low resistance of the micro switch is unstable for many reasons. To solve it, the structure of the contact part of the switch must be analyzed in detail, the assembly method must be checked, and the problem can be pinpointed, so that they can be solved one by one.

For this reason, we analyzed the switch with poor low resistance, and found that the two “V”-shaped grooves set on the positioning card in the switch are obviously asymmetrical, and the angles of the “V”-shaped grooves are very different. .

Due to the asymmetry of the “V”-shaped groove, a pair of contact pieces installed in the “V”-shaped groove will have different heights, resulting in different contact pressures between the R arc part of the contact piece and the short conductive parts. will produce low-resistance instability;

In addition, after the two short conductive parts are installed in the base, the bending plane also has the problem of different heights.

There are two reasons for the different bending planes of the two short conductive parts:

One is caused by the inconsistency of the depth of the step groove in the base;

The other is that the size of the conductive parts changes after the riveting process during the assembly process, resulting in different bending planes and uneven deformation of the two conductive parts.

In this way, it is bound to aggravate the poor contact between the moving contact piece and the short conductive parts and the long conductive parts, resulting in low resistance instability, large low resistance, or even failure;

Furthermore, if the gap between the bending plane of the conductive member and the base is too large, the contact pressure between the movable contact piece and the short conductive member in the normally-on state will decrease, which will also cause the low resistance to be unstable or too large.

Read more about the Car Indicator Lights

Low resistance unstable



Mini Pushbutton Switch

The poor conversion synchronization of the micro push button switch means that the buttons of the two micro-switches cannot act at the same time to connect the line under the push of the handle, but one after the other, resulting in a hysteresis action.

This problem is caused by the accumulated error after the parts are assembled, and the other is caused by the serious deformation of the step plane at the lower end of the handle.

The poor consistency of the parts will cause a large difference in the action stroke of the micro switch, and the step plane at the lower end of the handle is seriously deformed, which will cause the change of the contact position of the micro switch button.

The handle parts are solid parts in the original design, with a diameter of 4mm and a step diameter of 5∙5mm.

In the injection molding process, shrinkage deformation will occur (for plastic parts, the surrounding wall thickness must be as consistent as possible), resulting in uneven step plane and poor linearity, and the step plane and the button of the micro switch cannot be in contact at the same time.

Rotate the handle by an angle, and the position of the contact point changes accordingly.

Therefore, the conversion synchronization of the micro push button switch during use is poor.

To address this, we have improved the structure of the handle part.

In the center of the original handle, a deep hole with a diameter of 2mm is added, so that the thickness of the material around the handle is basically uniform.

After such improvement, the injection molded parts no longer shrink and deform, the plane of the step end is straight, and the linearity of the outer circle is obviously improved, and is no longer affected by the rotation angle of the handle.

At the same time, corrections regarding part consistency “minimize cumulative errors.”


micro push button switch

Through the above correction and improvement of the relevant parts of the micro push button switch, the long-standing problems of low resistance, instability and poor synchronization of the micro push button switch have been completely solved, so that the micro push button switch can be successfully mass-produced.

Working Principle and Fault Detection Method of Relay Indicator Light Module

Fault of Relay Indicator Light Module

The failure rate of relays in the vehicle electronic control system is also relatively high. In order to quickly and accurately determine which relay is faulty, we connect an indicator light module in parallel at both ends of the relay coil to display the power gain and loss status of the relay, which is often encountered during use. Because the relay fault indicator light causes the circuit breaker to trip, which leads to many bad events such as the train clearing off the assembly line.

FILN is a manufacturer with more than 20 years of experience in the production and design of indicator lights. FILN’s customized services will provide you with personalized and professional indicator lights. According to your needs for indicator light color, voltage, brightness, etc., Provide you with professional indicator light solutions to help you improve the quality of procurement and simplify the procurement process.

2 Types Of LED Indicators You Must Know For Your Business

Indicator light accessories

What is the Subway Relay Light Work Principle?

The relay indicator module is composed of light-emitting diodes and bidirectional transient voltage stabilizer diodes (TVS), which are connected in parallel with the relay coil, and the light-emitting diodes are used to display the gain and loss of the relay.

When there is an instantaneous surge voltage in the loop, the bidirectional voltage regulator tube will break down quickly, change from high resistance state to low resistance state, shunt and clamp the surge voltage, so as to protect the components in the circuit from being damaged by the instantaneous surge voltage.

The surge pulse voltage is damaged, so that the voltage at both ends of the relay is stabilized within the standard voltage range, and the freewheeling diode D2 is used to absorb the instantaneous back electromotive force generated during the process of turning on to cutting off the coil, thereby effectively protecting related components.

During the debugging process, we often encounter the tripping of the circuit breaker due to the instantaneous increase of the current caused by the damage of the internal Zener tube or diode.

Whenever we encounter this situation, we find out by pulling the wires one by one. This method not only It is time-consuming and laborious, but also greatly reduces work efficiency. Below, I will find a quick detection method based on the internal schematic diagram of the indicator light module.

Learn more How to distinguish the quality of LED indicators?

Reasons and detection methods of subway relay fault indicator light

Taking the trip of the zero-speed circuit breaker (ZVRCB) of a subway project as a column to analyze the reasons and the detection and processing method of fault indicator light, the ZVRCB tripping phenomenon occurred in the second column of a subway project during the debugging process.

The resistance value of the lower end of the circuit breaker to the negative line is found to be infinite, which indicates that the gap is not caused by the short circuit of the positive and negative lines. Since it is the second train, the reason for the small capacity selection of the circuit breaker is also ruled out.

Under normal circumstances, as long as the braking system detects that the train is in a stopped state, the braking system outputs a zero-speed signal, that is, the ZVRTC and ZVRM relays are energized and their normally open contacts are closed, so that the ZVR1-ZVR5 zero-speed relays are energized.

Now the trip is definitely caused by a fault indicator light from ZVR1 to ZVR5, but which fault indicator light is the specific fault indicator light. Normally, we can find out by pulling the wires all the way.

This is not only time-consuming and laborious, but also seriously affects the work efficiency.

Its principle shows that when the coil is energized, due to the reverse cut-off effect of the diode D1, the protection circuit is regarded as an open circuit, that is, the current does not pass through the protection circuit, that is, it does not pass through D2 and DZ1;

At this time, the voltage regulator tube (DZ1) is reversely broken down to absorb the instantaneous high voltage, and the ordinary diode D2 is used for freewheeling.

Even if the Zener tube is in a failed state due to thermal breakdown short-circuit, it can continue to flow through the diode D2, which only reduces the ability of the circuit to eliminate arcs, but does not short-circuit the entire circuit, so the reason for the jump switch is due to D1. , D2 or DZ1 breakdown causes the current in the circuit to increase instantaneously, so we can directly measure the tube voltage drop between T1 and T2, T2 and T3, the normal value of the tube voltage drop is (0.5-0.7v) to judge the end Which LED module is damaged.

If there is forward conduction and reverse cut-off between T1 and T2, that is, the diode between T1 and T2 is normal, otherwise the diode fault indicator light, that is, the fault indicator light of this channel, if there is a tube voltage drop between T2 and T3, the module is damaged.

The time meter pen can be measured in reverse to more accurately determine whether D2 or DZ1 is damaged.

Under normal circumstances, the tube pressure drop between T2 and T3 is infinite. If there is a tube pressure drop between T2 and T3 and the circuit is damaged, we can directly short-circuit T1 and T2 to skip the indicator module to quickly Excluding the fault indicator light, this method can not only quickly determine the fault point but also greatly improve the work efficiency.

How Do You Choose The Best Quality Rocker Switch


With the continuous development of technology, the domestic new urban rail vehicle systems all use high-performance vector control or direct torque control AC drive systems, which have excellent speed regulation performance and power utilization performance; the train bus control system is widely used, which greatly reduces the The internal wiring of the vehicle is improved, and the reliability of the vehicle operation is improved; Automatic Train Operation (ATO)。

Automatic Train Protection (ATP) and Automatic Train Monitoring (ATS) have become the basic configuration standards, which greatly improves the reliability and safety of train operation. , reducing the labor intensity of drivers and dispatchers.

The high-performance analog electro-pneumatic braking system is widely used, which realizes seamless air-electric joint control and excellent anti-skid and anti-idling performance. Each system is closely connected, and each link is related to the safety of the train.

From the perspective of commissioners, we It is necessary to understand the working principles of its internal systems, and to actively improve and study the systems and components that have hidden dangers. Only in this way can the safety of subway vehicles be better ensured, the reliability of subway vehicles can be improved, and the safe and fast operation of urban rail vehicles can be ensured.

The Indicator Light Industry Has Fully Recovered