High impedance stage (CB20564E)

This high input impedance amplifier stage was found in a 1963 documentation. The transistor germanium of the time.

Car Battery Power Supply (CB25334E)
This car battery power supply was found in the June 1990 issue of Radio Electronics magazine....
Micro Organ (CB16660E)
This toy musical instrument has the notes given by the capacitors on the keyboard. The circuit can be...
Flasher (CB22498E)
Originally designed for an incandescent lamp, this flasher or pulser can be adapted to operate with...