This circuit indicates the logical level of a CMOS circuit, extracting the power from the circuit being analyzed. The circuit is from an American magazine from the 90s.
Found in a 1965 General Electric circuit manual, this circuit uses SCRs from that time. Modern...
This frequency corresponds to musical note C3. Frequency accuracy depends on the accuracy of the...
This traditional signal injector configuration was obtained in a 1977 amateur radio manual. The...