This circuit is from the 1990 Motorola Linear Databook, which can be developed with more modern equivalent operating systems. The 1 uF capacitor should be of good quality polyester with small leaks
An OR gate can be improvised using NAND gates of a 4001 as shown here. The diodes are...
This electronic ignition circuit uses a new component at the time, the Ignistor, a transistor with...
January 2017 - Omron G7L-x relays for PCB mounting can now be purchased from Mouser Electronics. These...