W5100-SPI board

This is a very small SPI connected Ethernet TCP/IP module using the ​WIZnet W5100 chip. W5100 is a hardwired TCP/IP processor.

It required a small fix to make the board work. The bug was about the center tap of transformer.

This module works with Arduino. It is compatible with the ​Arduino Ethernet library in the Arduino 0012 distribution.

I have started this project before this summer. I have ordered manufacture of PCB on September, and I received it on October. I spent 3 hours to solder. I regret that I choose 1005 (metric) SMD LCR devices. The main chip is 0.4mm pitch 80 pins LQFP.

I am now working on a single board W5100 with AVR board.

（2008/10/17 - sgk）