This circuit is from a 1968 documentation using one of the first integrated circuits available at the time, the TAA370. The circuit is powered by 1.3 V using a 200 ohm handset.
The MC1436 can also be used on this circuit found in Motorola's 1993 Linear Interface ICs. The...
The basic purpose of this circuit is to apply an audio signal to a video carrier for sound and...
When the sensor X1 is opened, the relay is energized. When waiting, the current drained is very...