This analog instrument circuit was found in a 1990s William Sheets. The components are common and are only suitable for cars with mechanical switching (platinum).
This circuit with two 555s was found in the Encyclopedia of Electronic Circuits volume 5 of 1995....
This high frequency pulse generator was found in an old American documentation. The circuit makes use...
This 6-transistor receiver was manufactured in Japan in the 60s. The circuit is superheterodyne and has a 6V...