This super regenerative detector circuit was found in an English documentation from 1963. The coil is frequency compliant. The transistors are germanium of the time.
When the lights turns off this circuit will produce a sound like a cricket. When the lights are...
The circuit shown by the figure below can produce signals in the range between 20 kHz and 30 kHz....
This circuit is suggested by Texas Instruments in his Optoelectronics Sourcebook. The transistors...