DetectPulse PUBLIC

Detect activation pulse but not diagnostic, turn on diode to indicate pulse, reset with user button.

Need help to create a signal detecting circuit. Signal to detect is in a black box environment, can only measure voltage over resistor, not same ground as measurement circuit.

Detect Signal Ur1= 5V 1ms pulse but dont trigger on diagnostic Ur1=100mv 1ms pulse. Need to measure over the existing 2.2ohm resistor without disturbing measured circuit to much. When detecting signal, turn on diode and keep it on until checked by user.

Step one - Create functioning circuit Step two - Use as small and few parts as possible