[specto]

Can I re-purpose an old dell power supply to power my cmoybb? The voltage is correct so I think it should work?

Specto

 

[Zaubertuba]

Are you talking about a laptop wall-wart or a full sized desktop PSU? I'm actually using the former (a cheap generic switching one, no less) on my a47, using a buffered TLE2426 rail splitter, and it works just fine. As far as the latter, a relatively modern full-sized supply won't power up if it's not plugged into a motherboard.

 

[specto]

sorry I should have clarified, a 20V, 70 watt, dell ac adapter from an old laptop

 

[Juaquin]

You can use a regular desktop power supply. You just have to jumper two pins - the Green one (there will be only one) to any black one (ground). That's it. Of course, you'd need a high quality PSU if you wanted to use it for audio, not one out of a cheap old machine. It would be cheaper just to buy a wall-wart than a quality PSU, but if you have one lying around it could work (although it would be messy and overkill).

That Dell laptop adapter should be ok; what's the upper limit for the input voltage on the CmoyBB? 20V might be a bit high, depending on your opamp.

 

[specto]

Sounds good, the cmoybb can use up to 24V so I think it should be fine. I really wasn't sure because of the high wattage on the ac adapter.

 

[Juaquin]

Wattage isn't a problem - they are rated for a maximum amount of power. Using less than the maximum is fine, using more causes problems. The power supply won't even know the cmoy is there.