Easy to make, one side circuit board for using with Printbots like the ArduSkyBot or the HKTR-9000 :)
Update 1.1: Added component values to the schematic. Thanks to Martin Velickovski for the note!
You can use one of this methods to make the PCB:
http://www.instructables.com/id/Toner-transfer-no-soak-high-quality-double-sided/ (this one didn't work for me, you should try it anyway...)
Designed with Kicad