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.
We found this circuit in an American 80's documentation. The circuit can be adapted to function as a...
This 80's circuit, suggested in Texas Insrtruments documentation, uses a Hall effect sensor. The...
This interesting benchtop circuit was found in the May 1977 issue of Radio Electronics magazine. The...