Simple audio mixing

[Karlos]

A pair of 741 op amps (left and right) configured as a virtual earth  and a gain of 1? You can shove as many inputs as you want into that :-)

[Karlos]

Ah well.

If you know someone nearby who's handy with a soldering iron, you could knock it together for a fiver (inc case and connectors). The number of components needed really is small, the opamps plus a couple of resistors.

It doesn't quite qualify as a passive mixer (requiring a power supply) but it works.

You could just get some audio connectors and connect them all up in parallel. I wouldn't reccomend this however - especially when the different machine outputs may have different impedances etc...

[Karlos]

Same here, not sure how old I was though! I seem to recall it was something to do with souping up my old RC car with a beefier motor...

I think anybody with more than a passing interest in electronics has managed to burn themselves on a soldering iron at least once.

Its usually enough to make sure you don't do it again!

-edit-

Mind you, it wasn't a patch on the time when my poor mum dropped a pan of boiling spuds over her almost bare feet. That was nasty...