We found this circuit in an old magazine. This is an assisted ignition, where the contact breaker is kept. The circuit uses transistors that are uncommon today. Equivalents can be tested.
Using the ULN-3784B this circuit typically supplies 5 W at 24 W. However, it can operate from 9 V....
This circuit, from a former publication of 1968 was originally designed for germanium transistors, but with the...
This circuit simulates an 18-point digital display using light bulbs, but can be adapted to use...