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-   -   Wire Kit for Battery (http://www.diyaudio.com/forums/power-supplies/167705-wire-kit-battery.html)

BubbaGump 29th May 2010 09:50 PM

Wire Kit for Battery
 
Can anyone tell me how to wire this kit for battery use? (Please don't say read the PDF data sheet. Trust me, I have.) I would like to use 3 AAA batteries.

EBM_dude 29th May 2010 09:55 PM

It is designed to run on 8 V to 24 V. You'd need six AAA batteries to get 9 Volts. Wire the batteries in series.

BubbaGump 29th May 2010 10:14 PM

Actually it runs on 2.4 to 5.5V, because it has a 5V regulator that I bypassed because I'm using batteries. What I really need to know is how to NOT use the 2.5mm DC power input, and wire those holes for battery use instead.

EBM_dude 29th May 2010 10:17 PM

Ah, I see. Then it probably has some capacitor near the regulator. Use three batteries in series, connected directly to the capacitor.

BubbaGump 29th May 2010 10:29 PM

So I don't connect any wires where the DC power input holes are? Right now I've tried connecting my positive lead to the hole that the center, in this case positive, pin would go in. There are two other pins, and I tried making both negative but that didn't work. Even with one negative it gets really hot and doesn't work.

EBM_dude 29th May 2010 11:03 PM

I suppose it's a 7805 regulator there. AFAIK they do nothing if the input voltage is not a few Volts above the set voltage.

BubbaGump 29th May 2010 11:05 PM

Hmmm. Well I removed the regulator and am going to try to hook up my battery to the male DC input, but should I remove the diode D2 as well?

EBM_dude 29th May 2010 11:13 PM

If you are REALLY sure you'll never confuse the polarity, then yes.

BubbaGump 29th May 2010 11:14 PM

Oh, well it won't do any harm leaving it, will it?

EBM_dude 29th May 2010 11:37 PM

It will lower the input voltage by approximately half a Volt. Otherwise, it's just fine where it is.


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