Hello Everyone,
I am putting together a low voltage 3V circuit that senses motion via a PIR sensor, then the signal is amplified by a dual channel op amp that triggers a monostable vibrator IC to output a high voltage to a mosfet which will activate a LED light for a set time. The circuit works great on the breadboard... but on the PCB circuit the PIR and OP amp work fine but once I install the monostable vibrator the op amp keeps retriggering once the set time of the monostable vibrator kicks out. Any suggestions? Attached is the circuit
I am putting together a low voltage 3V circuit that senses motion via a PIR sensor, then the signal is amplified by a dual channel op amp that triggers a monostable vibrator IC to output a high voltage to a mosfet which will activate a LED light for a set time. The circuit works great on the breadboard... but on the PCB circuit the PIR and OP amp work fine but once I install the monostable vibrator the op amp keeps retriggering once the set time of the monostable vibrator kicks out. Any suggestions? Attached is the circuit