This LED DC voltage indicator circuit is a voltmeter, rather than simply a battery tester. As such it may measure voltages as low as 3V. It utilizes venerable LM741 operational amplifiers applied as ...

There are many applications where the accuracy of a digital or analogue (bar graph) is not required but something better than a simple low/high indicator is desirable. A battery charge level indicator ...

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The Clearwater Voltage Sentry is an easy and unique way to keep track of the electrical drain on your motorcycle. Designed to be “thermally stable, highly accurate, reliable, flexible and with a very ...