This circuit with unijunction transistors was found in a documentation from the 80's. The trigger times of the SCRs depend on the capacitors and are adjusted in the 5M (4M7) potentiometers.
Found in a 1967 Electronics World, this circuit uses components from the time. Modern...
The National Semiconductor LM675 operational amplifier can provide up to 3 A of output current. In the...
This circuit is from a Radio Electronics from October 1970. The circuit uses transistors from that...