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 components used in this 80's circuit are not common today. The circuit is very sensitive and must...
This flood or humidity alarm was found in an English publication in 1991. It can still be fitted...
We found this circuit in an old amateur radio manual. The circuit makes use of PIN diodes to...