With this simple circuit it is possible to simulate a telephone line for carrying out repairs on telephone sets. The transformer must be 36 V and the diode can also be 1N4004.
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...