Mini Megaphone (CB8952E)

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

Joystick with Potentiometers (CB16015E)
Two potentiometers mounted at right angles, so that they can be operated by a lever, form a very...
Logic Control 555 (CB13832E)
The purpose of this modified astable is to make the initial pulses have the same duration as the...
Electric fence (CB6231E)
This circuit was found in an American 80's circuit board. The components used are current except the...