This Intersil circuit was found in a 1980s documentation. Operational are of the time, but current equivalents can be experienced. The graph with the circuit performance is given next to the diagram.
This circuit with unijunction transistors was found in a documentation from the 80's. The trigger...
We found this alarm in an English publication from 1978. Although the original power supply is 3...
This TTL circuit was found in the February 1973 issue of Radio Electronics magazine. The power...