General > Buy/Sell/Wanted

power supply kits and schematics

(1/3) > >>

MikeJuszkie:
I have been looking around for quite some time to build a bench power supply. I have found kits and schematics but I am not sure of the reliability of them. So that is when i thought to myself and realized why not ask the EEVblog forum. There is plenty of experience there, I'm sure someone will know exactly what I need.

I am looking for these specs.

Constant current control and constant voltage
0 to  +- 10V
0 to 1.5 A

What have you had success with?
Any good deals on kits?
 

caffeinatedbard:
Hey,

I would check out the power supply series that Dave is currently working on on the videoblog site.  I think it fits your requirements.

Good luck!

MikeJuszkie:
Believe me, that was the first place I looked

His is only going to be 0 to +6 V and 0 to +1 A
I am looking to have -10 to 0 V and 0 to +10V with 0 to 1.5A

grenert:
Finding a kit that goes down to 0V is going to be hard to do.
If you can live with a minimum of around 1.25V, the Elenco XP-720K is a nice project.  The manual says it outputs 1A for each rail, but the design is LM317/LM337, which typically put out 1.5A.  Replacing the stock pots on that kit with 10-turn ones will give you finer control of the voltage setting.

Here's some info:
http://c0nsumer.livejournal.com/836691.html
http://www.n5ese.com/xp720.htm
http://freezerdev.blogspot.com/2011/11/elenco-xp-720k.html

It's sold by a lot of places, this seems to be cheapest:
http://www.testequipmentdepot.com/elenco/power-supplies/xp720.htm

sacherjj:
The Kit that Dave is working on can be easily modified to fit your specs.  You would only need to modify the input voltage and the op amp gain resistors to go up past 12V.  The LT3080 can only push 1.1A, but the LT3083 can do 3A.  So with minimal changes, and swapping the LT3080 for an LT3083, you can have up to 3A and up to around 18V.  (Although, the higher the voltage you go, the more load on the regulator at high current and low voltage applications.)

If you build two of these, you can have two supplies or join Pos to Gnd and get your +/- voltages for op amp work.  You just have to use isolated feeds for the power. 

I will be working on very similar mods eventually.  However, there are tons of Honey Do projects in front of that.  :)

Navigation

[0] Message Index

[#] Next page