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.
The 556 integrated circuit is actually a double 555. This circuit can be assembled from an...
The transducer used in this configuration that appears elsewhere on this site is a piezoelectric...
This modern XTAL radio replaces the galena crystal for a germanium diode as the 1N34 or...