This circuit uses a 7-segment display to indicate the logic level of a test circuit. The power supply is made with 5 V that can come from the analyzed circuit itself.
Suggested by Amperex in 1968, this circuit is intended for hearing aids. The integrated circuit...
This circuit was found in a Popular Electronics from April 1993. It is a voltage regulator circuit...
This simple unregulated power supply with half-wave rectification is for small appliances that do...