The Arduino is basically just a processor chip on a breakout board that has some connectors, crystal, voltage regulator, USB interface. The standard processor is an Atmel ATMEGA328. The Arduino Nano is a shrunk down version that can be treated as a DIP packaged processor. You can also buy bare ATMega328 chips with the Arduino bootloader pre-programmed. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.