This CMOS circuit was obtained in a 1980s documentation. The circuit has a 10-second time delay before firing. The transistor is a general-purpose type and power supply according to the relay.
Motorola's integrated circuit used in this' 70s amplifier is no longer common today. Neither do...
This circuit activates a relay when the phone rings allowing the control of a warning lamp or even...
Found in a 1969 British publication, this circuit uses a regenerative switch with two transistors to...