Found in a 1969 British publication, this circuit uses a regenerative switch with two transistors to produce pulses that depend on C1. The relay must be in accordance with the supply voltage.
The integrated circuit used in this project is not common today, but the circuit can be adapted to use a...
This circuit allows frequencies between 1.8 and 30 MHz to pass. Data for the coils is provided next to...
This circuit of starting lights for auto-race was found in an English documentation from the 80's....