Voice Scrambler (CB22462E)

We found this circuit in a Popular Electronics from 1992. It consists of a voice scrambler used in telephone transmissions.

TTL Oscillator (CB9097E)
This low frequency circuit was found in documentation from the 1980s. The values of R and C...
12 V x 10 A Power Supply (CB18219E)
This source for devices for automotive use was found in a 1985 documentation. The power...
Air Pressure Change Sensor (CB6528E)
Found on Popular Electronics in the 1980s, this circuit detects a change in air pressure using a...