Published in the September 1973 issue of Radio Electronics magazine, this diagram may be useful to restorers, since the integrated circuit is no longer manufactured.
We found this circuit in an old documentation. The instrument can be an ordinary multimeter in the...
This simple electroscope with bipolar transistors is not the most sensitive, but can detect static...
This circuit was found in an old Popular Electronics. It causes an LED to pulse and, at the same...