The simples method to manufacturing PCBs at home is the toner trasfer method.But the laser printer is the most important a part of this technic and the laser printer is expensive stuff for only printing some PCB / month. The cheapest method to manufacturing PCBs at home is using alcoholic pen and drawing the traces with your own hands . But our hands resolution or the precision is not enough in most case. The PCB plotter machine with CNC controlling are the solution of this problem. I spend my last weeks to build this PCB plotter machine from 2 CDROM driver and a floppy driver. The parameters: 38mm*38mm Workspace (enough in most case) 0.0735 mm / steep (in halfsteeping mode) Parts that is used: As I said : 2 CDROM and 1 Floppy driver 3 * L293 Dual Full Bridge Motor Driver IC Power supply of course ATMEGA88 and USB2Serial bridge Some wires and pin headers The full cost is about 15$!! The manufacturing flow I using Eagle Cad for design the circuits a...
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