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I had it hooked up to a test load before the first time to make sure it was working at all, and it was putting out far lower than the diode can take. I also put a fuse in the driver to make sure that it doesnt go above 2A just to make sure.

so we're thinking its the driver then. thats what i was hoping for. still not totally convinced thats the issue, but its the cheapest place to start. i will post a reply when i get the new chip in. any other suggestions would be greatly appreciated until then though!

Oh yea, thats something i didnt mention, im almost certain its not battery because when i have it hooked up to an adjustable power supply, the results are the same. And Im pretty dang sure that my heatsink for the diode is more than sufficient. Are you saying the chip needs a really good...

Hi all, i tried searching for a solution to my problem. It seems others have had similar issues but with different solutions. So heres my issue... I built a driver using a lm338, and am using it to power a m140 diode, first time i tried this, it worked great for a little while but then, it...

no its 10v going into the driver. about 5.3 coming out if i remember correctly, i should check to make sure. the driver was working before i connected it yes. and i had the wires soldered to the diode and everything before i powered it up so i dont think there was any residual power in the cap...

hello, new to the forums and lasers. Before i get hit with people telling me to search, i did for quite a while and didnt find anything that helped me. If a solution is mentioned somewhere else, a link would be great :yh: . So i was really interested in building a 405nm laser as a first project...