Josh Koffman wrote:
> Is the serial remote input on an iPod 5v tolerant? Some of the
> websites I've found say it's a 3.3v port, some don't say. I found one
> that connects it directly to a PIC pin at 5v. I'd imagine the TX line
> is 3.3v but I'm only interested in sending commands to the RX line.

To be safe, measure the TX line and don't drive the RX line higher than
that.  If TX is 3.3V, then you only need two resistors if driving from a 5V
PIC.  I usually use 2Kohms in series and 3.9Kohms to ground.


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