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Indicator

Car Blown Brake Light Indicator Circuit to Detect Broken Bulb Filament Tail Light

Last Updated on May 16, 2026 by Swagatam 19 Comments

CARBULBFUSEINDICATOR 1

In this post I have explained a simple fused or blown car brake light indicator circuit using a single IC 555 and a few other passive components. The idea was requested by Mr. Joel Bayongasan Technical Specifications You innovations are great! Thanks for this blog. May I request something please? I was searching for a […]

Filed Under: Automobile Electronics Tagged With: Blown, Brake, Broken, Detect, Indicator, Light

Ultrasonic Fuel Level Indicator Circuit

Last Updated on May 16, 2026 by Swagatam 53 Comments

fuel installation

An electronic device or circuit which detects and indicates the various fuel levels in a fuel tank without a physical contact, through ultrasonic waves, is called an ultrasonic fuel level sensor In this post I have explained how to build a simple fuel tank level indicator circuit using Arduino and ultrasonic sensors. In every vehicle […]

Filed Under: Arduino Projects, Automobile Electronics Tagged With: Fuel, Indicator, Level, Ultrasonic

3-Pin Solid-State Car Turn Indicator Flasher Circuit – Transistorized

Last Updated on May 16, 2026 by Swagatam 6 Comments

car solid state flasher unit

Although, most of the car electronics have evolved into solid-sate versions, a turn indicator flasher unit is one device which still depend on a relay based design in many of the modern cars. Disadvantages of Relay Based Flasher There are a couple major disadvantages of a relay based electromechanical flasher unit: 1) First, these being […]

Filed Under: Automobile Electronics Tagged With: Flasher, Indicator, Solid, State, Transistorized, Turn

Windshield Washer Fluid Indicator Circuit

Last Updated on May 16, 2026 by Swagatam 1 Comment

windshield washer fluid indicator circuit

In this article I have explained a permanent indicator of the windshield washer fluid level. Knowing that electronics do not mix well with liquids, instead of using a float gauge system, we have devised a completely different operating principle for you. The operation of our circuit is based on timing the duration of the motor’s […]

Filed Under: Automobile Electronics Tagged With: Fluid, Indicator, Washer, Windshield

Music Power Level Indicator Circuit using IC LM3915

Last Updated on May 15, 2026 by Swagatam 9 Comments

level2Bmeter2Bcircuit

In this post I have explained a  LED music power level indicator for indicating a subwoofer bass power range, which can be also modified as an effective dancing Electroluminescent Wire light show. The idea was requested by Mr. David. Technical Specifications Here’s an idea or suggestion for your projects or what ever lol My son […]

Filed Under: Audio and Amplifier Projects Tagged With: Indicator, Level, LM3915, Music, Power

IC 555 Low Battery Indicator Circuit

Last Updated on February 2, 2026 by Swagatam 59 Comments

lowbatteryindicatorcircuitusingIC555

In this article I have explained a simple low battery indicator circuit using the IC 555 and a few resistors only. Circuit Concept Many electronic circuits such as emergency lights,  battery chargers, UPS systems, flashlights etc essentially require a low battery indication feature in order to avoid over discharge of the involved battery. An over discharge could mean a permanent damage […]

Filed Under: Sensors and Detectors Tagged With: 555, Battery, Indicator

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