This circuit with different colored indicator LEDs has an expanded scale. We found it in the March 1992 Radio Electronics magazine. For an adjustable range of 0 to 10.5 V.
The circuit presented is from the 1997 LinearTechnology Applications. The circuit uses components of...
Using an RCA CA3035 integrated circuit, this turntable circuit was found in the February 1970...
The circuit shown in the figure and uses the diode in the leakage current operation mode. In it,...