Found in an Elektor from the 90s, this circuit simulates a rotary switch that provides a BCD output from a 1 pole x 10 common position switch. The circuit can be powered by voltages from 3 to 15 V.
The traditional circuit was taken from a French magazine Radio Plans that no longer exists but can...
This capacitance or approximation relay was found in an ancient American documentation. The SCR...
We found this receiver in an old English documentation. The JFET is commonly used and the bipolars can...