Meter & Visualization

LED bar graph spectrum analyzer with green gradient bars

Camera exposure compensation meter — vertical bar from center zero

Audio volume unit meter — green/amber/red gradient bars

Graphic EQ frequency band display with warm/cool color coding

Camera luminance histogram rendered on canvas

Video waveform monitor rendered on canvas

Loading/transfer progress indicator with gradient fill

Phone signal strength indicator — 5-bar ascending staircase

Battery charge indicator with 3-color fill states

Camera horizon level — spirit level with center mark

Viewfinder EV ruler with tick marks and floating indicator dot

D'Arsonval moving-coil VU needle meter with spring return

Full 360-degree rotating needle indicator — compass/tachometer

Animated CRT oscilloscope trace with phosphor persistence effect