PrintrBot Simple Heatbed

Heatbed for the Printrbot Simple http://printrbot.com/shop/printrbot-simple/
I changed the size from the reprap bed and fit it to the printrbot printer.

The temperatur sensor is a honywell thermistor: ntc 100k with beta value 3974K. I bought mine from farnell.
The temperatur sensor works out of box, when i connect to the T-bed connector.

The brd file is eagle format.

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PrintrBot Simple
http://www.indoor-hydroponic.org/?p=236