Can any one recommend a good but affordable power suppy

I use a Tenama, its not the best but it sure does the job.

Kas

Single output? Volts, amps?

I am looking for a dual output, 1A and +/-15V as the minimum.  Thanks for asking.

Hi Gene,

What you describe is a standard low cost unit up until you mentioned micro amps. I would recommend that you get a low cost unit that will read down to 10 milliamps and then get a bench multimeter that you can use for more precise amp readings. I have this power supply which has worked very well for my simple bench top experiments.

http://www.mastechpowersupply.com/mastech-linear-dc-power-supply-30v-3a-hy3003f-3-triple-outputs.html

I have made several similar units that were not quite as good as the commercial unit and if you counted my labor as worth anything the one I built would be more expensive than the commercial unit.

John

uAmps won't be doable cheaply unless you route through an external ammeter. I have used these two units and they are OK. If I recall correctly, they are heavy.

http://www.newark.com/gw-instek/gpc-3030d/power-supply-bench-adj-3o-p-30v/dp/86K0359

http://www.newark.com/b-k-precision/1672/power-supply-dc-32v-195va/dp/08J5304

Kas mentioned a Tenma and Newark has one that looks like it is made by the same factory that made mine.

http://www.newark.com/tenma/72-8695a/power-supply-3ch-32v-3a-adj-fixed/dp/47X1650

John

Thanks for all the good recommendations!

Thanks to jw0752 and @Michael Wylie for the suggestion to use an external ammeter as a way to get better current resolutions.  I have tried this in the past with my cheap multimeter with less that stellar results.  Now it looks like I need and new power supply and a new multimeter!

Although I've never used it, Dave Jones makes a uCurrent adapter for multimeters

https://www.eevblog.com/projects/ucurrent/

Yeah, that is pretty cool.  I have seen a couple of write-up on this product before.

I have used a ACS712 (Hall effect, linear current sensor) in another product and I might be able to adapt my design slightly to build a suitable current monitor (hopefully with a gain selector to allow current ranges).  I just have to either find some extra time or extra money (it always seems to come down to one of the two).

Thanks!

Gene

michaelwylie  wrote:

 

Although I've never used it, Dave Jones makes a uCurrent adapter for multimeters

https://www.eevblog.com/projects/ucurrent/

I have one. It gets regular use.