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I copied the wrong image url :banghead: But just using a pot isn't CC and even though I've used a precision multi-turn pot in the past, it still did the same.

Thanks Lazerz for the advice, I'll incorporate that into my circuit. Sorry, I have got more questions :o : 1) I want to be able to measure the current on the PSU going through each of the binding posts, and the only way I found that could measure the current without the current literally going...

I've also read that the 3.3V rail and the 5V rail also shares a common power output, does this mean if I load either the 12V, 5V or 3.3V rail, all of them will be loaded properly? @Lazerz Looks great, do you think there is a possibility that I would be able to fit all the regulating circuitry...

^I don't know if it will stay the same after he is high :)

I'm planning to have all the normal voltages to pick from (12V, 5V, 3.3V and -12V), and one separate plug with an adjustable voltage which can handle up to 5 Amps. Thank you for all your help! I can't wait to get started on my PSU, especially after I saw your Blue Ice Machine :) +1 coming your...

Did you check just the solid yellows or the yellow wires with the black stripe on them also? According to THIS site you can parallel them for a higher current output, but it is not just the sum of the outputs. But according to the label of this PSU HERE The current output just adds up.

Thanks Spectre, I'll keep that in mind. I got just two more questions (sorry:o): 1) Say I put the two 12V rails in parallel, does the output just add up? Say 20A+20A= 40A output? There is much controversy on the web about this, can anyone clear this up? 2) On the label of the unit there is a min...

The best part is, that guy says in a third vid that the laser was built by Moh:wtf: I also found this huy, I saw him a while ago on YT (Lots of language!!):

Thanks Zeebit, that is exactly what the tutorial said. Sorry, I am a complete noob when it comes to PC parts. THIS review shows what max current I can pull from each voltage rail, does this mean I can pull all this current simultaneously for different applications at the same time? Or can I only...

Yeah, on the tutorial I'm going to follow there is already a load across the 3.3V and 5V output to prevent the PSU from failing, thank you for all your help guys! Also already have to digital voltage panel meters just for this purpose:) If I can, I'm going buy the PSU tonight so it should be...

Thanks Eud, but I'm not only going to use this just for lasers. I want to use this for all my projects and the higher voltages will come in handy. Thank you for your input! I just didn't want to buy a PSU and not be able to convert it to a bench supply. I see there are a 12V1 and a 12V2 rail, is...

Hi LPF, I'm planning on building a bench PSU from a PC PSU in the near future, and since I don't have any PC PSUs lying around I went online looking for one. I found a secondhand Thermaltake Litepower 450W for $17. It has been barely used (the guy bought the wrong PSU) and in very good...

Great pics......as always! Your making me want some optics to play with!!

That's the problem, you need a constant current source to control the current, otherwise you will keep on killing you diode. HERE is a link to the schematic. I suggest you read "The I want to build a laser thread" before proceeding.

Was the PSU on CC or CV mode? If on the latter, this will cause a thermal runaway as the resistance lowers as the temp of the diode rises, allowing more and more current, eventually killing the diode.

If you want you can easily build your own driver with a LM2941 or LM317. You can see at my build (HERE) it is possible to get them rather small. They are also VERY cheap to build.

O-Like also sells lasers in this host

Just note that you can edit your posts by clicking the "EDIT" button on the bottom right of your post

The output voltage is definitely not max 1V, I ran LPC-826 with one of these (Needs around 3.5V)

So you always need to add the dropout voltage plus the reference voltage to get the full dropout voltage when operating in constant current mode? Thank you, I will remember it! :beer: