This circuit makes use of a 741 single source operational amplifier to measure resistors on a linear scale. The circuit may use as an indicator a common multimeter on a low current range.
Operated directly from the power grid, this detector was found in an 80's RCA documentation. The sensor is...
This circuit with 24 dB per octave attenuation was found in the November 1973 Radio Electronics magazine....
This amplifier was found in an Electronics Now from the 90s. The FETs are part of a CD4007CB. |...