LCD display driver (CB7558E)

This LCD driver circuit uses a common component today. The circuit is from 90's documentation.

VCO CMOS (CB4434E)
This circuit produces signals that depend on the input control voltage. It is a Voltage Controlled...
110 V or 220 V Voltage Indicator (CB16899E)
This simple circuit uses a zener diode and two LEDs to indicate whether the voltage of a power grid...
Audio Priority Switch (CB12434E)
We found this circuit in a 1981 publication. We applied an audio signal, for example, a music...