While working on a wind/PV system in a remote area of the Philippines the need   for a voltmeter which showed the system (battery) voltage in detail arose. Only analogue V and A meters were available in the local town. This simple design explains in detail how to convert a low range ammeter into a voltmeter that will display an expanded range of voltages. For a lead-acid battery this was chosen to be 10 to 16V DC.

Download the pdf voltmeter plans here

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