Introduction: DIY Make Led Driver for Laser or Led Diode

Led driver made of two componets LM317 regulator and one resistor,value of resistor is calculated by formula R=1.25/current you get the resistance of resistor for example in video I use 1.5ohms 2resistor in parralel each one is 3 ohms.
Watch the video how to make your own led driver

Comments

AsdOmega (author)2016-10-19

Nice one

JeremyG1 made it! (author)2014-08-20

Thanks for sharing this simple driver. It has really helped!

abu.saud.5268 (author)JeremyG12015-04-20

how u given the connections i cant see turn it back.

miicchhii (author)2014-08-14

An extended curcuit with current adjustment, reverse-voltage protection can be found in this post:

www.langeder.org/homemade-laser-driver-with-lm317/

take care

survivorwolf (author)2013-01-02

Resistors in parallel don't add up. Only series resistors add together. right now you are using an equivalent resistance of .75 ohms.

In fact he is using two 3 Ohms resistors put in parallel, which means an equivalent resistance of 1.5 Ohms.

Yeah I realized that later. The way I read it and the way it was pictured threw me off. I had a fail moment but he is indeed correct.

D-A-N (author)2012-08-05

Great video, I found it very helpful thank you.
What song is playing?

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Bio: My name is marjancho and I love electronics,makeing gadgets,hack and pranks.
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