This circuit is from 1999 documentation. The integrated circuit used is not very common today. Both transistors are used if the motor current is greater than 500 mA.
Indicated for automotive use in an American documentation of 1975, this circuit uses components of the...
This flip-flop with neon lamps was found in a 1969 publication that deals precisely with neon...
The frequency depends on the coil and is not found in the original documentation but should be...