With this circuit any number of 4017 integrated circuits can be connected in series. The circuit is from a Radio Electronics from April 1989.
This circuit for igniting gas flames was found in a 1967 Electronic Design. The SCR firing device is a...
This RF wattmeter was found in an American 1980s documentation. The components are common and the...
This signal follower, from a publication from the 1970s, uses old germanium transistors such as...