This circuit was found in a 1964 Electronic Design. The transistors are of the time, but can be employed as modern equivalents. The system is for car with contact breaker.
This circuit uses components that are no longer easily found. The circuit is from a 1988...
Suitable for battery powered microcontrolled applications this Texas Instruments circuit from its...
June 2016 - It can be purchased from Mouser Electronics the new triacs Z04 for 4 A from...