This circuit uses two relays that switch when the voltage exceeds the value given by zener D2. The circuit is from a Radio Electronics magazine from April 1975.
This circuit can be used to add a delay to a logic signal as shown by the input and output...
Found in the April 1974 issue of Radio Electronics magazine, this circuit is based on CMOS...
This circuit converts a high impedance signal into low impedance. The circuit has unit gain and...