About Ethernut Ethernut is an Open Source Hardware and Software Project for building tiny Embedded Ethernet Devices. "When I was your age, we had 8 bit CPUs! And we liked it! And we didn't complain!" Hardware Five Open Source Reference Designs are currently available: Ethernut 1 Minimal low cost version, initially using the ATmega103 CPU, which had been later replaced by the ATmega128. The on-chip