printed circuit board (PCB)

custom 3d printed backplate

circuit breaker / circuit-breaker

on-board digital computer / on-board computer

Warning beeps when board is armed with motors off when idle (repeats until board is disarmed or throttle is increased)

amplifier circuit

bombing circuit

circuit

circuit-closing device

communication circuit

demodulator circuit

dual-firing circuit

electric firing circuit

electrical circuit

intensity mine circuit

remote-controlled radio circuit

safety circuit

voice circuit

weapon control circuit

wire circuit detector

air circuit breaker

air-blast circuit breaker

automatic overload circuit breaker

back-up circuit breaker

buried conduit wire circuit

circuit breaker with overload trips

highspeed circuit breaker

loop circuit breaker

main circuit breaker panel

miniature circuit breaker

oil circuit breaker

power circuit breaker

solenoid-operated circuit breaker