This circuit was obtained from an 80's EDN. The components used are still common. The circuit can be used as a shield and the frequency is approximately 775 Hz.
September 2016 - It can be obtained from Mouser Electronics a kit for developing wireless remote...
We found this touch control on a Popular Electronics from 1970. The circuit makes use of an...
August 2016 - It can be obtained from Mouser Electronics the new temperature and humidity sensors from...