In this post we study a simple rechargeable LED lantern circuit which features battery charging option from a dynamo as well as from a mains 220V source. The idea was requested by Mr. Chidimonday. Technical Specifications I like what you doing here, i have even put in work some of your circuit and it functioned […]
Lamps and Lights
Sequential Timer Circuit using Transistors
In this post I have explained to make a simple sequential timer generator circuit which can be used for getting a sequential triggering of a connected load, or can be simply used like a sequential LED bar graph effect generator, using only transistors. The idea was requested by Mr Babusan. Technical Specifications Is it possible […]
Simple Scrolling RGB LED Circuit
A simple RGB (Red, Green, Blue) moving or scrolling LED display can be made using a few 4017 ICs. I have explained the procedure in detail. Understanding RGB LED RGB LEDs have become quite popular these days due to its three-in-one color feature, and because these can be driven independently using three distinct supply sources. […]
Transformerless Constant Current LED Driver Circuit
In this post I have explained how just a single IC MBI6001 can be used as a transformerless constant current LED driver circuit for illuminating a chain of many LED in series. The MBI6001 series of ICs are designed to work with mains AC inputs and convert it into a lower voltage DC output which […]
CREE XM-L T6 LED Driver Circuit – Specifications and Practical Application
This article explains how to illuminate a Cree XM-L T6 LED using a current controlled driver circuit while the supply input is from a battery, or in case a mains SMPS is intended as the driver unit. The idea was requested by Mr. Jaco. Technical Specifications Thanks for the great advice and circuits! Have you […]
Make this 2 Pin Bi-Color LED Flasher Circuit
This transformerless mains power supply circuit will allow flashing of a Bi-color 100 LED string, in an alternately switching red, green effect. Using 2-pin Bi-color LEDs The proposed circuit can be used as a Bi-color LED flasher, for generating an alternate red, green flashing effect over a string of 100 LEDs. Bi-color LEDs are available […]