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The 2 potentiometers are the simulation of photoresistors(LDR1 and LDR2), mind that resistance drops with increase in Lux.
"The 2 potentiometers, cant be equal to eachother by drag changing, this seems to crash the simulation for some reason."
Note, LDR1 and LDR2 are both at 81%, changing one to 80% "simulating darkness" should turn off the deathswitch, while making the H-bridge polarity match the input signal. Turning one them both back to about 81%+ should turn the deathswitch back on, so a sum percentage of both potentiometers of roughly about 162%. A way to imagine the potentiometers, is that the wiper position level is the indication of how much light they receive, the higher the light, the higher the wiper position percentage. Example of deathswitch functionality:
LDR1 = 81 ; LDR2 = 81 ; H-bridge = Off
LDR1 = 80 ; LDR2 = 81 ; H-bridge = Clockwise
LDR1 = 81 ; LDR2 = 80 ; H-bridge = Counter Clockwise
Schematic Component List
Logic:
2 LM393N U1 - U2
2 500 ohm resistor R1 - R2
2 5k ohm resistor R3 - R4
1 10k ohm resistor R5
2 Photoresistors R01 - R02
H-Bridge:
7 10k or 12k resistor R6 - R12
4 schottky diodes SB2040 D1 - D4
4 common diodes D5 - D8
3 N-Channel Mosfets 2N7000 Q5 - Q7
2 N-Channel Mosfets IRLZ24N Q3 - Q4
2 P-Channel Mosfets IRF9Z34N Q1 - Q2
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