This circuit for car engine spot adjustment was found in an 80's Radio Electronics. The circuit makes use of a xenon lamp and the pulse transformer must have a turn ratio of 1:50.
The circuit presented emulates an OR gate with the LM3900, operational transconductance amplifier....
This circuit was obtained from an English magazine from 1977. The magazine no longer exists, but...
This low power audio amplifier was found at 1992s Popular Electronics. Transistors are general...