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.
The configuration shown in the figure allows you to implement an debounced switch with CMOS or TTL...
This circuit was found in an old European documentation. When R2 is cut off the circuit triggers...
This circuit is primarily intended for the calibration of common radio IF steps using the...