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Topics - thevargi

#1
Hi, folks.

I've been successful at building a few basic 9 Volt battery operated lm386 amplifiers, but I'm really a complete newbie and feel like I've lucked into being successful rather than because I have any real knowledge or skill. I say this because a few of my amps end up draining the battery when they're turned off (while a few have not). I know I must have a short somewhere, but I don't really know how to test for such a thing. Can anyone tell me how to test for a battery drain?

I'm using a standard, mono, unswitched 1/4 input jack, a toggle switch for power control (sometimes an on/off, sometimes an on/off/on just wired with two wires) and an output speaker.

Anyway, like I said. I'm a complete newb, and I don't know where to start testing (I can use a multimeter, so there is that at least!).

Thanks in advance.