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 is from an old American publication, using transistors of the time and operating with a 48...
This high quality audio preamplifier uses three bipolar transistor and is powered from 24 V...
The circuit shown in the figure allows a pressure switch to be used to turn a load on and off in a...