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 5 V circuit was found in December 1978 Radio Electronics magazine. The power transistor must...
The voltage gain of this circuit found in the 1982 SGS Linear Integrated Circuits manual is 10...
August 2016 - can be found at Mouser Electronics new crystals to surface mount CX series of AVX....