This 1968 Texas Instruments circuit uses diacs of the era. SCRs can be modern equivalents according to the controlled load.
In this circuit we have the voltage multiplied by 5, obtaining between 50 and 80 V output when the...
We found this circuit in a 1962 publication by General Electric. The circuit applies to common...
This timer for a few minutes was originally indicated for photographic applications. We found it...