Found in the May 1988 issue of Radio Electronics magazine, this circuit is sensitive to small variations in input voltage. The power supply must be symmetrical.
This is a simple voltage tester for voltages from about 2V to about 15V with the indicated...
The integrated circuit used in this amplifier is not common today. The power can be between 4 and...
This digital thermometer circuit with MA1026 module was found in February 1981 Radio Electronics...