Found in a 90s Popular Electronics, this circuit interfaces the telephone line with an audio amplifier, reducing impedance matching and noise problems.
With calibrated RV1 it is possible to find a zener diode voltage. The integrated circuit is 0 741...
This power supply was originally created for the CB16760E (Loudness System) but can be used in any...
This car turn signal circuit was found in the April 1969 issue of Radio Electronics magazine. The...