Field Control
Early Controller Experiments
PIC Analogue Timers
...using a 555 monostable triggered by the PIC and fired back into it.
Original gschem schematic
Varying VR1 varies the time period killing two bird with one stone.
The software can use this instead of an internal timer making it separate to the software and this provides analogue control without ADC input.
See
PIC Analogue Control
for the software.
This would use two pins for each monostable circuit.
Two monostables: one for each mark and space; so 4 pins on total.
This removes the need for the buttons so this is a straight swap for them.
Original gschem schematic
Original inkscape drawing
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Drilling mask
Software
