Found in a 73 magazine for radio amateurs of the 1980s, this circuit uses a dual-gate MOSFET. This component is not currently common.
This circuit can be used as a shield. Its purpose is to detect the positive front of a signal...
This circuit, from a 1988 documentation, makes successive actuation of the shower to control the...
This solar powered circuit was found in a 1991 documentation. The transistor is a general purpose...