This commercial clock circuit was found in the August 1976 issue of Radio Electronics magazine. The circuit uses a period module and includes power from a special transformer.
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...