This simple circuit was found in the August 1984 issue of Radio Electronics magazine. The circuit monitors the power supply to a computer and has a backup battery.
Found in an old Electronic Design, this circuit provides an output voltage that is the absolute...
Other operational amplifiers can be used in this circuit obtained from the manufacturer's own...
Frequency in this oscillator is controlled by a crystal. Any 1 MHz to 15 MHz can be used. The JFET can...