We found this circuit in a Motorola manual. The circuit has the capacitor charging at 15 to 30 V, then discharging through the coil and generating a voltage that reaches 500 V for the spark plugs.
This circuit divides the grid 60 Hz frequency to obtain 20 Hz to drive mechanical watches used at...
This 80's circuit can be implemented with modern equivalent FETs with lower on resistance. The...
This circuit was obtained in a 1964 Electronic Design. Equivalent modern transistors can be used....