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 simple two transistor timer can be used to measure short time intervals. The power supply...
This low noise, low frequency instrumentation circuit was found in a 1976 NASA circuit manual. The...
This circuit is from Signetics' 80s documentation. The circuit generates 100 kHz signals according...