Using this screwshield: http://www.ebay.com/...5-/271334265468/ http://proto-pic.co.uk/protoscrewshield/
It has an LED hooked up to D13 (I can blink it etc with no issue) but I need to use D13 for SPI as I want to set up a chain of shift registers. Is having the LED on the shield going to mess up my SPI usage?
Thanks!
Chris