On Mon, 18 Aug 2008 00:20:24 -0400, "Josh Koffman" <joshybear@gmail.com>
said:
> Hi all. I've been trying to find an answer to this for awhile but so
> far haven't come up with anything definitive either way.
> 
> 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.
> 
> Kinda something I'd like to go straight before burning out my unit!

Hi Josh,

It is 3.3 volts. But whether or not it's 5 volt tolerant, I don't know
and since Apple doesn't publish real specs it's hard to say. The times I
have done it I have used 3.3 volts only, either through a voltage
divider or using a PNP transistor pulling up to the iPod's own 3.3 volt
output.

I imagine all the pins on the connector have some form of protection,
but I wouldn't want to risk driving it to latchup since there's no way
to pull the battery to release it from a latchup.

Cheerful regards,

Bob

-- 
http://www.fastmail.fm - Faster than the air-speed velocity of an
                          unladen european swallow

-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist