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.
We find this circuit in 1975 documentation. The circuit can be used with other operational...
With this circuit we can use old conventional phones on a simple internal line. The circuit has a...
This circuit uses any trigger function according to the associated logic. The circuit is from an...