Solar telephone (CB20504E)

This low-power intercom can be powered by solar cells. The circuit is two-way, with an integrated of the time. The circuit is from 1991.

Handbook of Electronics Formulas and Calculations - Volume 1
Author: Newton C. Braga Published:Aug, 2016 Formato:Book and e-Book Pages:...
AM Demodulator (CB6197E)
This circuit is from a 1980s Signetics documentation. The circuit separates the modulation signal from a...
Two-Transistor Oscillator (CB1387E )
This old oscillator using germanium transistors has a high impedance headphone as inductor to...