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).
This damped oscillator that mimics the sound of a gong was found in 90s American documentation. The...
PIC16F19197 Microcontroller Family Combines Battery-Friendly LCD Drive with Core Independent...
We find this circuit in a 1977 technical documentation. The circuit generates signals in a wide...