jnesselr / Snack Vending Machine - History

fix for motor not stopping
due to the gate pull up resistor current in the high side driver,
the triac was not turning off.

Cut and dead bugged a triac based low side driver as shown in the schematic.
This will use 8 triacs for the low side.

Staying with triacs, but SCRs would work.

design review changes
fix VCC and GND swap on high side driver
simplify catch diode setup to 1 diode
schematic cleanup
correct dV/dt cap value to give 2 ms soft start
increase triac trigger current to 4.3 mA
add manufacturer part numbers and data sheet link on some parts