The layout had been drew using Pad to pad
software for design the circuit and
print out on the plastic sheet size A4. Then, that plastic will be iron on PCB board so that the ink will be melt
onto it surface.
The
circuit then will be etching using etchant which is an acid, then unwanted part
will be varnish away and leave only the wanted one.
PCB board after
etching :
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