Balanced Modulator MC1594 (CB14588E)

This circuit is from the Motorola Linear Databook from 1990. The integrated circuit used is uncommon today.

Optical shield (CB20698E)
This circuit was found in American documentation from the 90s. The coupler is the type that uses a...
Flasher Power MOSFET and 555 (CB15694E)
Incandescent lamps of up to a few amps can be placed to flash with this circuit. The frequency depends...
Liquid Level Detector (CB19922E)
This circuit is used to detect the water level in a reservoir. It triggers the charge when the...