Mini Megaphone (CB8952E)

Found in Popular Electronics' 90s, this small megaphone is based on LM386. The circuit uses a high impedance microphone.

Solar panel linear power source (CB21023E)
The circuit is from an Electronics Hobbyst Handbook from the 90s, being valid for panels of the...
Sawtooth generator (CB8884E)
This circuit can generate signals from 80 to 800 Hz with an amplitude of 0.3 V. We find it in a...
Class A power amplifier (CB22236E)
This circuit is from an American publication from the 60's. The power is on the order of 600 mW....