This type of configuration, which appears elsewhere in this section, was found in a 1965 publication by General Electric. The circuit is half-wave and can be built with equivalent SCRs.
This circuit can be used for several purposes such as pulse counter, pass counter, roulette, etc....
This circuit is from Radio Electronics. The magazine no more exists, but the circuit can be...
We found this circuit in a French documentation from the 80's. The components used are still...