Your collection of MOSFETs can be replaced by a single integrated circuit 
called an 'audio crosspoint switch.

Bob Ammerman
RAm Systems

----- Original Message ----- 
From: "Robert Ussery" <uavscience@frii.com>
To: "Microcontroller discussion list - Public." <piclist@mit.edu>
Sent: Monday, December 27, 2004 6:56 PM
Subject: [EE] Voltage/current specs for audio output


> Hi, folks
>
> Synopsis: what are some general current/voltage specs for an audio output 
> of the computer or cd-player type (for headphones, etc. 3.5mm plug)?
>
> Specifics:
> I'm planning to build a software customizeable audio panel to connect 
> various audio input devices to various audio output devices. The input 
> devices will be a computer, a receiver, and a cd player. The output 
> devices will be a set of amplified computer speakers (Logitech Z-2300's, 
> if you're interested - great speakers), two pairs of wireless headphones, 
> and a couple sets of wired headphones.
>
> I need the voltage/current specs to decide on some MOSFETS to use for this 
> project. Any MOSFET p/n suggestions would also be appreciated. The MOSFETS 
> will be used to connect each input to an output. Each input will be 
> connected to every output via a MOSFET which may be switched on/off via 
> software control from a PIC.
>
> BTW, do ya'll know of any similar projects out there on the web? I googled 
> a bit, but I don't know what terms to use... Any project 
> suggestions/inputs would be appreciated.
>
> TTYL!
>
> - Robert
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