[josh] pointed out this hack for Garmin C510 and C530 GPS units. The newer C550 and C580’s feature text to speech directions. [Phil Hornby] put together a walk through that will add this ...
We think [Brek Martin] set out to build a handheld GPS and ended up adding an mp3 Player to it. Regardless, it’s beautifully constructed. Hand built circuit boards and even a custom antenna ...