This circuit was found in an old American documentation. It can operate with signals from 40 Hz to 50 Hz and the input voltage range is from 0 to 200 mV.
The basis of this project is a three-position lever switch or similar. When the switch is in the...
The purpose of this Hartley oscillator is to produce the shot effect on a toy or other...
This SCR thermostat circuit was obtained in a technical documentation from the 1980s. Some...