Gents,
Have to drive a bucket full of 12V relays but the uC is only 3.3V. The ULN2803 is touted as a driver for 5V TTL logic by most companies (like TI) but datasheets hint that it can happily live down to around 3V drive level. Is that kosher?
App note SLAA148 suggests it is kosher but ... I figure I'd better ask the famous gurus in this here group :-)
A FET version would be nice as it gets the outputs lower but that's only available from the more boutiquish suppliers. Demasiados Dolares, as usual.