This circuit was found in a 90s Popular Electronics. The circuit uses 4 bicolor LEDs to indicate signals of both TTL and CMOS logic. The circuit is powered by the source of the circuit under test.
This circuit was found in an Electronics Now of the 90s. It is intended for amplifying composite...
This circuit published in the November 1964 Radio Electronics magazine powers a light bulb but can...
This mixer uses only four passive component and can be used with high impedance sources. The input and...