This multi-output power supply was found in an article in Radio Electronics magazine in November 1985. Voltage regulators must be equipped with heat sinks.
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...