Using components from the era, this 90's EDN circuit is used in analog to digital conversion circuits. Components are not currently common.
This control was obtained in an old publication from 1985 and uses a triac, which today can be of...
This circuit was obtained from a 1990s documentation. The transistor admits equivalent and other...
This circuit can be used with the CIR12642E TTL Roulette, or other game circuits that must draw...