Josh Collins wrote: > And what is the PCF8574 chip I keep hearing about? How does it work? It's an I2C chip made by Philips. It has 8 quasi-bidirectional I/O pins so it can be used e.g. to blink LEDs or read switches, to take a simple example. It can be hooked up directly to the link port and used via I2C routines. -Ozone -- *** Osma Suominen *** ozone@clinet.fi *** http://www.clinet.fi/~ozone ***