This crystal oscillator generates a 20 MHz signal. Equivalent transistors such as BF494 and 2N2222 can be used. The stabilizing diodes can be 1N4148.
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...