This circuit was found in a 1969 Motorola documentation. The FET admits an equivalent. The circuit has high input impedance and is powered by voltages from 6 to 30 V.
This is one of the many versions we have of this alarm on our website. It was found in an English...
In the figure we have the simple way of controlling a load or having a signal from an optical...
Found in General Electric and 1967 documentation, this circuit automatically turns off the...