Hughes suggests this circuit in a 1968 documentation. The circuit uses old transistors that can be replaced with equivalents. MOSFET is the critical component of the circuit.
This circuit was obtained from the September 1971 issue of Radio Electronics magazine. The 709 is an...
Other components of this series of comparators can be used in this TTL interface for CMOS. The...
This circuit activates a relay, lighting a lamp when the sensor receives light. The sensor is a...