Got samples from analog.com.brNow to put them into use:
1) get geda installed
2) check/find the schematic symbols
3) check/find the pcb footprint
4) draw the schematc
5) layout a pcb
6) ask a friend to make the pcb
7) go into soldersmoke ( is a podcast actually)
8) make program for a pic or simply control it with an USB to lpt converter
#1 is done, to #2 though symbols needs to be created.