This circuit is from an American 1967 documentation and can be implemented with modern equivalent transistors. The circuit serves as a Q multiplier.
This circuit functions as a thermostat triggering a relay when the boil control temperature...
This circuit used in signaling for boats, cars or barriers was found in a 1980s documentation. It still...
This low current solenoid driver was found in an ancient American documentation. The solenoid must be...