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PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please sub






Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

Thanks for finding that, I missed it on my search. Seems OK, but noise ripple is too high for me.
 
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

This looks a lot like one posted by lasersbee. Don't you need to supply a voltage and current source to it? It seems to just regulate what is supplied by another PS.
 
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Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

You do, but a non adjustable PSU is a lot cheaper than a full blow adjustable bench PSU with that many features.
 
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

It would need to be about 70 VDC at 25 amps, though. Wouldn't it?
 
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

Wow, Paul. Congratulations on exceeding 2 Million Reps!! :gj: Thanks for contributing so much to the forum.

-cd. :D
 
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

Cyberdoc, you often post with quite a familiarity with the members, seems you have been in the forum for years. I don't need to find a 60 VDC power supply for this regulator, maybe 24-30 VDC will be all I need, of course then I couldn't reach 60 VDC output, but I don't think I'd ever use that high of a voltage. Looking at that test page, the guy does not indicate what kind of power supply he used on the input, maybe some of the noise came from that?
 
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

paul1598419 said:
It would need to be about 70 VDC at 25 amps, though. Wouldn't it?
Click to expand...

This page says it takes up to 60VDC.
https://www.banggood.com/RD-DPS5020...unication-Digital-Power-Supply-p-1181200.html

Alaskan said:
Cyberdoc, you often post with quite a familiarity with the members, seems you have been in the forum for years. I don't need to find a 60 VDC power supply for this regulator, maybe 24-30 VDC will be all I need, of course then I couldn't reach 60 VDC output, but I don't think I'd ever use that high of a voltage. Looking at that test page, the guy does not indicate what kind of power supply he used on the input, maybe some of the noise came from that?
Click to expand...

I don't think so, his equipment is mostly lab quality. He does lots of battery and charger reviews.
 
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

I read somewhere the minimum input voltage to make it work was fairly low, 5 or 6 VDC, if I remember. That 60 VDC output is just top end.
 
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

Of course you don't have to run it at its maximum. And if you are going to use it to power laser didoes, you wouldn't want either. But, I imagine you will want the current to remain high. Otherwise you could get by with a cheaper version.

Thanks, Barry. I try best to help out when I can.
 
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Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

For laser diodes I just found a Xantrex 7.5 (up to 8 VDC, unofficially) 80 amp power supply instead, I wanted a lab PS made by that company, they come with 10 turn pots for both current and voltage, as well as have low ripple and power up/down protection from over voltage spikes (which our cheap China power supplies don't have, killed a diode with one of those). 80 amps? Yep, my FAP's can draw 50 amps. I did buy one of those DPS5020 units too along with a nice mounting case for it for another 20 dollars, that I will use for my higher voltage needs, so looking for a ~30 VDC ~20 amp or higher voltage brick with low ripple for that now, may have to settle for a lower voltage to find one at a good price and quality, higher voltage bricks at 20 amps are often spendy, even used on ebay.

Setting up my hobby bench here in Qatar :)
 
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Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

Great. I set my bench up several years ago. I hated trying to work on the floor. It's just no good. I have my scope on a metal scope cart that rolls around and my large laptop on its own fan cooled stand. It makes working on projects much easier.
 
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

I have one in Alaska already good to go, but couldn't bring all that stuff here, so duplicating.
 
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

paul1598419 said:
It would need to be about 70 VDC at 25 amps, though. Wouldn't it?
Click to expand...

While it does require a prohibitively large input PSU, it's probably closer to 55V at 20A for max range and power. If you're only going to use it up to 12V for example, 15V 20A, 24V 12A or 48V at 6A would be fine.

It's a buck converter, plain and simple. Power out plus inefficiency is the necessary power in.
 
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

Probably, 65 in gives 60 out, I have two on the way for my higher voltage (not LD’s) needs.
 
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

I am currently bidding on this NDG7475 diode. www.ebay.com/itm/142734900447. I'd appreciate it if no one would bid against me as I plan on getting this one. :thanks:
 
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