In this post I have explained a simple LM317 IC based RGB 3 watt LED color mixer circuit, which can be used for demonstrating the color mixing effects of red, blue, green colors as specified in the standard color charts. The idea was requested by Mr.Praveen. Technical Specifications My name is Pravin, I work in […]
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How Crank Flashlights Work
A crank flashlight basically works by hand cranking a permanent magnet motor, which generates electricity for illuminating the attached LEDs. Motor Becomes a Generator Normally, a permanent magnet motor is used for executing a rotational movement by applying a DC potential across its specified supply terminals. However we also know that the same motor can […]
3 Best Joule Thief Circuits
A joule thief circuit is basically an efficient, self-oscillating voltage booster circuit, built using a single transistor, resistor and an inductor, which can boost voltages as low as 0.4 V from any dead AAA 1.5 cell, to much higher levels. Technically it may seem impossible to illuminate a 3.3 V LED with a 1.5V source, […]
Controlling LED Strip Light ON/OFF and Brightness with any Remote Control
In this post I will show how to construct LED strip controller circuit using Arduino, which can turn ON/OFF and decrease/increase brightness of LEDs using ordinary IR (Infrared) remote. What is LED Strip Light? (For noobs) If you are not familiar with LED strip lights, let’s understand what it is. LED strips (sometimes called as […]
Illuminated Crosswalk Safety Light Circuit
In this article I have explained a simple illuminated crosswalk safety light circuit for ensuring a safe walking passage for the user amidst heavy traffic. The idea was requested by Mr. John. Circuit Objectives and Requirements I recently came upon your website while researching circuits for a hobby project i’m working on. I certainly admire […]
“WELCOME” LED Display Circuit
In this post I have explained how to make a chasing “WELCOME” display circuit sign board, which illuminates each alphabet sequentially until all the 7 alphabets are lit and then the whole display shuts off, the cycle continues permanently as long as the circuit is powered. Overview I have already discussed a similar concept explaining […]