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.
This configuration with FET and Unijunction can be found elsewhere on this site. The JFET admits...
This circuit, suggested by General Electric, increases the sensitivity of a common multimeter to 1 M /...
Suggested by an American technical documentation, this circuit is polarized in order to provide an...