Posted on Friday, May 20, 2011 • Category: LED
Here's a really simple and inexpensive Power LED driver circuit. The circuit is a "constant current source", which means that it keeps the LED brightness constant no matter what power supply you use or surrounding environmental conditions you subject the LED's to.
Or to put in another way: "this is better than using a resistor". It's more consistent, more efficient, and more flexible. It's ideal for High-power LED's especially, and can be used for any number and configuration of normal or high-power LED's with any type of power supply.
As a simple project, i've built the driver circuit and connected it to a high-power LED and a power-brick, making a plug-in light. Power LED's are now around $3, so this is a very inexpensive project with many uses, and you can easily change it to use more LED's, batteries, etc. 1.5V to 5V Converter Transformerless Joule Thief Power RGB LED Controller LED Torch Using MAX660 Eliminating LED Christmas Lights Flicker Running LEDs with PIC 12F675 555 LED Pulsing Breathing Circuit MAINS operate Christmas Star LED Bargraph Optical Tachometer RGB LED Controller with PIC12F675
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