The circuit was found in the February 1992 Radio Electronics magazine. The scale can be changed by changing R2 and R3.
This circuit locks after a short touch on the sensor. The circuit can be powered by voltages from 5...
This circuit is from a Radio Electronics magazine from August 1990. The circuit uses components from the...
This 8-channel converter was found in a 1970s American documentation. The integrated circuits used are...