7-segment display driver (CB20551E)

We found this circuit in English documentation from 1996 for PCs. The circuit is for common cathode display.

() CB7257E Headlight on reminder
Found in Popular Electronics this circuit will trigger a buzzer if the ignition key is removed...
6-Channel Sequential (CB17353E)
This sequential circuit drives 6 SCRs that control incandescent lamps. Other types of lamps should...
Telemonitor (CB9232E)
Suggested by a Popular Electronics from the 90s, this circuit triggers an external load, relay or...