The transistor used in this circuit is uncommon today. AC124 or equivalent such as AC188K and 2N2431 can be used. The circuit is from the 80's and makes use of transformers.
This circuit is from an old publication, from the 80s, since in modern cars this type of circuit is...
Found in an American documentation from the 90's, this circuit aims to light a neon lamp with...
This is an old 1988 circuit consisting of a timer or time control for exposing silk-screen arrays. The...