This circuit is from a 1977 Signetics integrated circuit manual. The output transistors can be BD136 and BD237 and the symmetrical supply can be from 6 to 12 V. The voltage gain is 10.
This circuit uses a metal enclosed transistor as a temperature sensor. The circuit is from an old...
This 13.8 V power supply with 10 A output is intended to supply power to automotive power...
This circuit with PUT is from a 1967 General Electric manual. The relay must have voltage...