Electronics > Beginners

I dont know how to wire this simple amp

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Hextejas:
Those PAM devices look kewl and they're cheap enough. So I am going to get some.  :-DD

6PTsocket:
My suggestion of two 9 volt batteries was mostly to illustrate a split power supply. It really  is too small to be usefull. I was trying to point out why he would have to use a cap with the speaker  if he could not get to the "center tap" on the supply. If he goes with a split supply he has to figure out which of those two "grounds" in his picture is ground and which is V- to the chip, as they would no longer be tied together.

Sent from my SM-G900V using Tapatalk

tooki:
The thing is prewired as a PCB. It’s very unlikely that it can be used with a split power supply. I reckon the chances that the two ground terminals aren’t permanently connected are somewhere between zero, zilch, and nil.

oPossum:
I have that exact board. The two ground pins are both connected to the ground plane. It would have to be modded to run with split supplies.

oPossum:
I did a brief test of this amp board.

At 12V the idle current is 35 mA. Enough volume to hear it over the fan of the HP 6632A that is powering it.

At 9V the idle current is 30 mA. It has usable clean output.

At 6V there is noticeable distortion at moderate volume.

At 4V it is essentially useless.

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