Check out this current regulator...

[jayrob]

Hey what do you guys think of this thing? I found it on e-bay for about $40 bucks. I was thinking of maybe using it in a labby to run one of Daedal's Phazor diodes with a heat sink. Any comments on this?
Jay

 

[BlueFusion]

Re: Check out this current regulator!

= RIP OFF...
Make one of DDL's circuits and save the $30 spare for another bluray diode!

 

[Zarniwoop]

If the max output is really 2.5V that's not gonna cut it.
You'd need a max of something over 3V.
I've gotta agree with BlueFusion - Daedal's LM317 circuit is much cheaper, only needs a few components, will supply as much current as this thing, and at suitable voltage.

 

[Benm]

It will probably supply more voltage than 2.5 volts, most current sources supply close to the input voltage when required. I guess its quite similar to the opamp based sources i normally use - power control using a normal pot over the full range is defenitely a bonus compared to LM317 solutions.

Then again, you can build such a current source for under $10 easily, if you're up for some soldering.