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  • Why the $3 Voltmeter Cannot Work With Inline Resistance

    From Bret Cahill@21:1/5 to All on Sun Apr 17 06:10:15 2022
    The lowest voltage it can measure is what powers the LED display so something must be acting like a DC to DC converter set at the display voltage.

    Additional resistance in series lowers the current too much to power the display.

    It only works on an ideal voltage source.

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  • From amdx@21:1/5 to Bret Cahill on Sat Apr 23 08:43:16 2022
    On 4/17/2022 8:10 AM, Bret Cahill wrote:
    The lowest voltage it can measure is what powers the LED display so something must be acting like a DC to DC converter set at the display voltage.

    Additional resistance in series lowers the current too much to power the display.

    It only works on an ideal voltage source.
    What Brand and model is this meter?
                Mikek

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