this is a simple led blinker. using two transistor. it's a basic astable circuit
you could go google for led flasher or something...
the prototype process is fairly long but needs little practice.
to make it an actual prototype...
a presensitized pcb has to be cut into shape
print the circuit on a transparency paper.
Preparing and cleaning of the exposure box and setting the time.
preparing to expose!!
Toasty!
Etchant and Developer
Caustic soda (sodium hydroxide) developing.
Ready to be etched!
the pcb being etched...
etched with exposed copper removed.
all hole done!
testing if it fits.. yes it does! yey!
always bend, cut and solder.
Cut the lead wires
Almost Done...
adding the components
i don't solder pretty good...
finally!
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