This circuit of starting lights for auto-race was found in an English documentation from the 80's. The LEDs must be of different colors, for greater realism.
This circuit is from a 2001 publication. The balun transformers are of the commercial type for TV...
This circuit is from an old publication from the 1950s. The circuit uses germanium transistors but can be...
This amplifier, from the 1990 Philips Databook, is suitable for automotive applications. The...