How do you add a headphone jack?

[Bionicomander]

How do you add a headphone jack to a portable?

[thewise1]

Well a simple one you can just hook up left and right audio signals to the console, however you need a circuit to turn the speakers off when you plug it in. plus there would be no audio control on the headphones. So basically you need an audio amplifier with a headphone jack. I don't know of any other way unless you made a circuit to turn off the speakers when you plug it in.

[Bionicomander]

What if it is mono?

[thewise1]

Well then it's the same, except you just connect one signal to the headphone jack. You still need a switch though.

[Kyo]

I take it the screen you're using doesn't have one?

If you don't want to build an entire amplifier, you could use a headphone with a switch & an inverter to turn off the speakers

[thewise1]

Kyo, how do you do that?

[Kyo]

Basically if no jack is in it's connected with headphone L and R, right? I took my multimeter and made a pinout (I think there was one somewhere, but oh well)


black is ground. Now; we want to use this jack (or something like it) independently. We need some way of detecting whether R or L is connected with the switch.(or - you know, to each other). This should not interfere with the sound, so here's my proposal:


I have not tested this! It should work, though. Unless there NEEDs to be a Vcc, which I don't think. I might test it later.

Edit: Actually this would effectively turn your stereo into mono... Unless you add some diodes inbetween the sound channels and the headphone jack, like so:

edit2: Actually the diodes would probably screw up the sound. Back to the drawing board.
edit3: There's more flaws with this. This is a crappy idea, just use an amplifier.

[Rekarp]

look at this and see if you can figure it out.

http://www.longhornengineer.com/DIY/Audiomono" onclick="window.open(this.href);return false;

[Kyo]

Ehhh, using something that was built for this purpose is cheating

[Rekarp]

Ehhh, using something that was built for this purpose is cheating