This circuit can be used as a shield for touch control. The circuit can use any common FET like the BF245 and should never be powered by a source without a transformer.
This circuit uses a 7-segment display to indicate the logic level of a test circuit. The power...
With the circuit shown, we have an excellent level for the signal obtained from an electret...
The integrated circuit used in this project is an old voltage comparator, since the configuration was...