Using JFETs, this circuit from a 90’s American documentation can generate signals of 0.15 Hz. The JFET can be of any general-purpose type like the BF245 or MPF102.
Found in a Popular Electronics from the 90's, this circuit detects the approach of objects by the...
March 2017 - This new component of Vishay has a 16-bit resolution that allows it to be used in a...
This circuit indicates through LEDs when an automotive fuse is open. ...