I try a 4 relay module like
http://4tronix.co.uk/store/index.php?rt=product/product&product_id=153
I check relay one by one using D13 - D10 but only D13 works.
I turn on / off relay with arduino sketch bridge.ino and firefox with http://192.168.0.9/arduino/digital/13/1
this work on every relay (tested connecting one by one with D13)
but by example http://192.168.0.9/arduino/digital/12/1 (or 11 or 10) doesn't work
Try with all other digital pins, but not work !!
Seems that other digital pins are broken or D13 output is more high than others ?
Thank's