Build Custom Meters

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Voltmeter[v_, opts___] := 
  Graphics[{{(*case*){EdgeForm[{Thickness[.007], GrayLevel[0]}], 
      GrayLevel[.2], 
      Rectangle[{-1.2, -1.1}, {1.2, 1.3}, 
       RoundingRadius -> .2]},(*case holes*){White, 
      Disk[{-1, -.9}, .05], Disk[{1, -.9}, .05], Disk[{1, 1.1}, .05], 
      Disk[{-1, 1.1}, .05]},(*case outer rim*){Black, 
      Disk[{0, .1}, 1.15], GrayLevel[.5], Disk[{-.02, .12}, 1.13], 
      GrayLevel[.2], Disk[{0, .1}, 1.11]},(*face highlight*)
     EdgeForm[{CapForm["Round"], Thickness[.02], Hue[.125, .7, .6]}], 
     Hue[.125, 1, 1], 
     Disk[{.02, .1}, 
      1, {1.1 Pi, -.1 Pi}],(*face shadow*){EdgeForm[{CapForm["Round"],
         Thickness[.01], Hue[.125, 1, 1]}], Hue[.125, 1, 1], 
      Disk[{-.02, .12}, 1, {1.1 Pi, -.1 Pi}]},(*face*){EdgeForm[], 
      Hue[.125, .5, 1], 
      Rotate[Polygon[({.1, -.04} + # &) /@ 
         Flatten[{{{0, 0}, {0, 1}}, 
           Array[{Sin[2 Pi*(#/50)], Cos[2 Pi*(#/50)]} &, 30]}, 1], 
        VertexColors -> 
         Flatten[{Hue[.125, 0, 1], 
           Array[Hue[.125, .5, 1] &, 50 + 1]}]], 
       30/50 Pi, {0, 
        0}]},(*case mid line highlight*){Hue[.125, .7, .6], 
      Thickness[.025], CapForm["Round"], 
      Line[{{-.95, -.2}, {0, .1}, {.95, -.2}}]},(*case mid disk \
highlight*){Hue[.125, .7, .6], Disk[{0, 0}, .25, {.95 Pi, .05 Pi}]}},
    Inset[
     AngularGauge[v, {0, 100}, GaugeFaceStyle -> None, 
      GaugeFrameStyle -> None, 
      GaugeMarkers -> 
       Graphics[{Hue[0, 1, .7], 
         Polygon[{{.1, .03}, {.1, -.03}, {.95, -.03}, {1, 
            0}, {.95, .03}}]}], 
      GaugeLabels -> {Placed[
         Style["VOLTS", FontFamily -> "Helvetica", Bold, 
          FontSize -> Scaled[.08], White], {.5, .35}]}, 
      LabelStyle -> 
       Directive[FontFamily -> "Helvetica", FontSize -> Scaled[.06]], 
      ScaleOrigin -> {{.85 Pi, .15 Pi}, .9}, 
      ScaleDivisions -> {2, 10}, 
      ScaleRanges -> {{Scaled[.75], Scaled[1]}}, 
      ScaleRangeStyle -> Hue[0, 1, .7, .7], AxesStyle -> Opacity[0], 
      TicksStyle -> {Thickness[.01], Thickness[.005]}, 
      ImageSize -> Automatic, ImagePadding -> None], {0, 0}, {0, 
      0}, {1.75, Automatic}], {(*case mid disk*)GrayLevel[.2], 
     Disk[{0, 0}, .2], GrayLevel[0], Disk[{0, 0}, .075], 
     Disk[{-.85, -.4}, .05], Disk[{.85, -.4}, .05]}}, 
   PlotRangeClipping -> True, opts];

Create custom meters by combining gauges and graphics.

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