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.
Found in an Electronic Design from the 90's, this circuit supplies voltages according to the...
This simple two-transistor circuit used transistors from the 60s, having been found in a...
The circuit shown, found in French documentation from the 1970s, functions as a variable...