The circuit presented uses two common transistors and is powered by the circuit being tested. The circuit is for TTL logic, since its supply is 5 V.
This configuration, which appears on other circuits on this site, was found in a European...
This circuit can supply currents up to 1 A from alternating input voltages. The circuit uses...
This very simple circuit was found in a 1977 documentation. The L1 coil has 3 turns of AWG wire 22 to...