Found in old American documentation, this circuit is intended for the control of heating elements. The SCR must have current according to the controlled load. Transistors are from the time.
This 555-based circuit was obtained from the 1995 Encyclopedia of Electronic Circuits volume 5. It...
This 1992 circuit was designed to operate with the CB16766E circuit auto alarm. The circuit...
This simple 2004 circuit uses a common sensor used in television and other equipment. It checks...