W5100-SPI board "Pistachio"
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 connection of the transformer center tap.
This module works with Arduino. It is compatible with the Arduino Ethernet library in the Arduino 0012 distribution. It operates on 3.3V. However, it can be connected directly with 5V system like Arduino.
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. 2012 devices are relatively easy. The main chip is 0.4mm pitch 80 pins LQFP.
The schematics is here (bug fixed).
I am now working on a single board W5100 with AVR board. I will continue to use 1005 devices because I will not continue to hand solder every board.
(2008/10/17 - sgk)
You can reach me by email to sgk at this domain.
