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1/4 inch mono audio jack question. REAL simple? Answered

I am building http://www.montagar.com/~patj/fuzz002.gif
 I am using a 1/4 inch mono audio jack like this one http://www.maplin.co.uk/images/Full/hf90x&fj00a.jpg

I know the output on the lft is negative while the one on the right is positive.
my question is on the circuit the jack on the far right only has one wire leading to it. it it positive or negative.



Best Answer 8 years ago

They answer it "neither". It's and audio signal.

The "output" as you call it on the left is actually the input.  It has a connection to the neg. terminal of the battery because it is also the on/off switch.  When you plug in a mono jack to this stereo socket you are shorting the neg terminal to ground turning everything on.

I still dont understand i undestood like the first half but all i need to know is on the right of the schemattic you see a wire going to the jack. I take that wire and solder that to input or output of my audio jack? and what do i do with the other input/output. im guessin that it connects to the input and the output goes to the negative in he 9v batt which in this case will be an AC wall adapter.

That jack has two connections.  But they are both output.

One is the ring and the other is the tip.

The ring connects to the ground (which is the ring on the input and the only other ground connection).

The tip connects to the wire going to d1 and d2.

Your "out" is the signal, it's relative to GND, so it's +ve. Tie the other connection to -ve/GND.