This circuit is from the time when cars used contact breakers. This 80's version measures the dwell angle of the contact breaker for dwell adjustment using an era integrated circuit, the LM3917.
This variable power supply uses common components and can supply a current up to 1 A. The...
In the figure we have the receiver of a sequential remote control operating at a frequency in the range of...
I found this simple circuit from an English magazine from 1984. The circuit can be easily...