This old version of analogue switch was found in a 1969 documentation. Components of the time are used, with emphasis on the CAG7 integrated circuit. It is worth as a reference.
We found this circuit in an American 1980s documentation. The circuit uses a piezoelectric transducer...
A ring and pendulum of stripped wires form the sensor for this alarm. Once triggered, to reset, you...
Other operational amplifiers in the series, such as the MC34072, MC34074, MC35071, MC35072,...