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Newly Updated Circuit Projects:

3 Automatic Fish Aquarium Light Optimizer Circuits

Last Updated on June 1, 2026 by Swagatam 3 Comments

solarfishaquariumlightoptimizercircuit

In this post I have explained a 3 beautiful fish aquarium light optimizer circuits your fishes will love. These are designed to automatically control the illumination of a group of appropriately selected LEDs with respect to the varying daylight and after darkness sets in. The first idea was requested by Mr. Amit 1) Sun light […]

Filed Under: Lamps and Lights Tagged With: Aquarium, Automatic, Circuits, Fish, Light, Optimizer

Wireless Helmet Mounted Brake Light Circuit

Last Updated on May 16, 2026 by Swagatam 106 Comments

In this post I have explained an innovative wireless LED brake light circuit which can be attached to a biker’s helmet. The LEDs attached with the helmet circuit illuminates in response to the motorcycle braking  generating an enhanced brake light effect from the user’s helmet. The idea was requested by Mr. Bugoy. Technical Specifications Good […]

Filed Under: Automobile Electronics Tagged With: Brake, Helmet, Light, Mounted, Wireless

Automatic LED Candle Light Circuit

Last Updated on June 1, 2026 by Swagatam 18 Comments

The post describes a simple 220V  mains transformerless LED candle light circuit which switches ON automatically in the absence of ambient light in the room and vice versa. The idea was requested by Mr. Don Technical Specifications I only dabble with electronics here and there but in trying to move from incandescent and CFL’s to […]

Filed Under: Lamps and Lights Tagged With: Automatic, Candle, LED, Light

LED Brightness and Efficiency Tester Circuit

Last Updated on June 8, 2026 by Swagatam 4 Comments

In this post I have explained a simple LDR brightness and efficiency tester circuit set up using an LDR and a digital Ohm meter. The idea was requested by Mr. Prashant Technical Specifications I want to check brightness and light of 1 watt led. Can i check it with help of ldr. Bekoz luminous sensor […]

Filed Under: Meters and Testers Tagged With: Brightness, Efficiency, LED, Tester

How to Measure Dissolved Oxygen in Liquids

Last Updated on April 19, 2020 by Swagatam 3 Comments

dissolvedoxygensensor

In this post I have explained a sensor device used for measuring the level or amount of dissolved oxygen in water and other fluids. The idea was requested by Mr. Amit Technical Specifications  I didn’t find sensors or sensor modules for Dissolved Oxygen or pH readings for us to use with controllers for our projects. […]

Filed Under: Water Controller Tagged With: Dissolved, Liquids, Measure, Oxygen

Digital Up/Down Volume Control Circuit

Last Updated on January 1, 2019 by Swagatam 2 Comments

digitalvolumecontrolcircuit

In this post I have explained a simple digital volume control circuit using the IC DS1668 which can be used in amplifiers and all audio equipment for achieving a push button press up/down volume control facility. What are Electronic Rheostats The DS1668 and DS1669 Dallastats are electronic rheostats or potentiometers. These devices present 64 possible […]

Filed Under: Sensors and Detectors Tagged With: Control, Digital, Down, Volume

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