This circuit is from a technical documentation on the National Semiconductor LM3909. The tripping transformer has a 1:1 turn ratio and the circuit is powered with 5V.
This configuration, found in many other circuits in this section, was obtained in a 1970s American...
This circuit for incandescent lamps was found in an American documentation from the 80s. The...
Found in old English documentation this circuit can be made with a BF245 or equivalent. Coils are...