This buzzer trigger can be used for small alarms. We find it in an 80’s American documentation. The supply can be done with voltages from 3 to 18 V.
We found this circuit in an ancient American documentation. It can be adapted to operate in other...
Found in a 90s Popular Electronics, this circuit triggers a load from the audio signal applied to...
Found in ancient American documentation, this circuit produces a pulse every 8 Hz of a 400 Hz...