We found in this American documentation this circuit for activating common cathode displays. In it we have the way to cascade the 4033 to drive two displays (dozens and units).
Intended for use with signals from tape recorder pickups, this circuit was found in the December 1972...
In the figure we have the configuration of a voltage regulator with 3 transistors. The components depend...
This circuit was found in an 80s documentation. The integrated circuit used is from that time,...