Osgeld wrote:@ UAirLtd its not all silly, and you can trace it back to telegraphs if you really wanted to dig in deep, its just archaic
I didn't mean "silly" as in "that was a silly design decision". I said "all silly", like sort of a childish way of saying "all strange and unusual".
DFTBA4ever wrote:How do we know it doesn't draw voltage from the RS232 and data on the PS2?
It's unusual for things to be powered off RS232 these days, you can kind of get away with it for low-power things, but definitely not for a GPS receiver. RS232 lines aren't designed to supply much current, and drawing current from it risks damage if you exceed the supply limits.
I bet if you pop it open you could find a max232 like circuit on board keeping a computer from blowing its 5 volt circuitry up.[\quote]
I agree, this is highly likely, if you do find an RS232 level converter circuit, you'd probably be able to trace the signals back to the original 5V TTL serial data lines that you could feasibly directly connect to an Arduino, bypassing all this need to use level converters.