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 timer for long time intervals is from the 1990 Motorola Linear Databook. The setting applies...
The output voltage of the circuit shown in the figure is approximately 7.0 V for a 15 V supply...
Suitable for recovering tape recorded media from a common tape player mechanism, this circuit is...