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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

Battery Current Indicator Circuit – Current Triggered Charging Cut off

Last Updated on June 1, 2026 by Swagatam 32 Comments

In this post I have explained about a simple battery current sensor with indicator circuit which detects the amount of current consumed by the battery while charging. The presented designs also have an auto cut off when the battery stops consuming current at its full charge level.. Why Current Drops as Battery gets Charged We […]

Filed Under: Indicator Circuits Tagged With: Battery, Charging, Current, Indicator, Triggered

Battery Charging Fault Indicator Circuit

Last Updated on May 17, 2026 by Swagatam 130 Comments

li ionfaultindicator

In this article I have explained a battery status indicator circuit which can be also used as a battery charging fault indicator circuit. The idea was requested by Mr. Faizan. The Design The idea presented here takes care of all the parameters required for charging a battery ideally and safely. Referring to the shown battery […]

Filed Under: Battery Charger Circuits Tagged With: Battery, Charging, Fault, Indicator

4 LED Temperature Indicator Circuit

Last Updated on June 27, 2020 by Swagatam 28 Comments

temperartureindicator

The 4 LED temperature indicator circuit discussed here is very useful for getting a visual information regarding the state of temperature which is to be monitored. Circuit Operation In the circuit temperature status is displayed using four LEDs. – A green LED, indicating that the temperature is in the desirable level- Two yellow LEDs are […]

Filed Under: Temperature Controllers Tagged With: Indicator, LED, Temperature

Flashing LED Battery Low Indicator Circuit

Last Updated on June 1, 2026 by Swagatam 36 Comments

In this post I have explained a simple low/normal battery voltage status indicator circuit through a flashing and a constant LED, where the flashing LED indicates a normal status while the solid indicator warns against a low battery condition. The idea was requested by Mr.Alf. Technical Specifications Hi, I found and built your “Low Battery […]

Filed Under: Indicator Circuits Tagged With: Battery, Flashing, Indicator, LED

Car Radiator Hot Indicator Circuit

Last Updated on June 1, 2026 by Swagatam 3 Comments

car radiator indicator circuit 1

The proposed circuit is very useful which warns the car driver before hand once the radiator gets heated up above the preset level. How it Works The working of this circuit is very simple and works off on the car battery. The familiar IC555 is used here which is the heart of the circuit. The […]

Filed Under: Automobile Electronics, Indicator Circuits Tagged With: Indicator, Radiator

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