Found in an American publication of 1968, this circuit makes use of a pilot light of the time. It can be replaced with LED with appropriate series resistor. Transistors may be modern equivalents.
The circuit shown has a maximum output current of 1.5 A. We find this traditional configuration in the Linear...
We found this circuit in a 1977 National Semiconductor Databook. The circuit can use other FETs...
This decoder filter was found in a 1975 documentation. The integrated circuits can be 741. The...