Nice PSU

[ped]

30V 20A LED High-Power Switching Variable DC Power Supply 220V New | eBay

Massive 20A variable PSU...

Very handy for testing these new diodes & phatlights

Looks ok doesnt it?

 

[Blord]

Looks like the beefier version of the 30V-3/5A PSU we seen around here. I wander if the voltage ripple has also improved.

 

[sinner]

I didnt had a bench psu so i got this one as my first..
I wanted to charge multiple 18650's and test the diodes and whatnot..
it says 0.6A-2.0A.. 0V-16V! should i get a better one like the one posted by ped..

 

[Cyparagon]

They're fine for charging batteries and powering circuits, but do NOT use these Chinese PSUs to power laser diodes unless you put them on a scope first. The Yihua I have (I think it's spelled Yihua, anyway :undecided has a small voltage spike at startup. It has an even larger spike if you're running it in current mode, and considerable ripple current. The Mastech I have is very clean.

 

[sinner]

I tested several diodes, it worked okay.. I followed dtr's instructions on that one..
I guess i was lucky then.. thanks for the suggestion, will get it tested on a scope..

 

[ped]

Anyone who connects a diode THEN switches the PSU on needs thier head ready anyway.

Lots of PSU's will surge at switch on, Like most other people who know what their doing, I reduce the current to minimum and short the leads out, then connect the load.

 

[Tonga]

They're fine for charging batteries and powering circuits, but do NOT use these Chinese PSUs to power laser diodes unless you put them on a scope first. The Yihua I have (I think it's spelled Yihua, anyway :undecided has a small voltage spike at startup. It has an even larger spike if you're running it in current mode, and considerable ripple current. The Mastech I have is very clean.

That's good to know from you. I use a Mastech GPS-1850D:thanks:!

Anyone who connects a diode THEN switches the PSU on needs thier head ready anyway.

Lots of PSU's will surge at switch on, Like most other people who know what their doing, I reduce the current to minimum and short the leads out, then connect the load.

Thank you for the good advice man, that will be my standard procedure for not blowing a diode while testing it:wave:!

 

[LEDSanders]

Do we really need 20A?
I had a 1A I used for years that I eventualy burnt out, and I have been thinking about getting a 5A.

Digital DC Power Supply 30V 5A Precision Variable Adjustable Lab Grade X5045 | eBay.

 

[ped]

Do we really need 20A?
I had a 1A I used for years that I eventualy burnt out, and I have been thinking about getting a 5A.

Digital DC Power Supply 30V 5A Precision Variable Adjustable Lab Grade X5045 | eBay.

Short answer? yes.


For the hobbyist the >5A would be fine...but for the extreme builder who fiddles with phatlights and multi diode array's , you need a bit more oomph.

 

[LaZeRz]

20 amps would even be sufficient for small scale anodizing, but a higher amperage would be more ideal.

 

[Fiddy]

that looks good, maybe too good to pass up...

 

[Things]

I have a 0-16V 40A PSU. Works a treat. Only voltage adjustment mode though, but 40A is enough to have a bit of fun with

 

[ped]

When my finances are better, I'll go for one I think