Mini 0–30V OLED Panel Voltmeter

Keep a low-voltage rail visible within a small project enclosure. This mini OLED voltmeter provides a numerical DC voltage display. It is for makers adding a panel readout rather than choosing a standalone protected multimeter.

• ✅ See the supply value locally — An OLED presents a direct voltage reading.
• ✅ Fit a compact panel area — The small module suits limited enclosure space.
• ✅ Choose a refresh setting — The described configuration offers two update rates.
• ✅ Match the physical version — Standard and ultra-thin options are separate.

Separate operating supply from measurement input

The detailed specification gives a 3.5–30V operating supply and 0–30V measurement range. Verify the board pinout and grounding before wiring; the display is not an isolated protective meter.

The stated typical accuracy is about 0.7%, not the unsupported high-precision figure elsewhere. Refresh is 5 Hz by default with a described 10 Hz configuration. Installation changes require an appropriate circuit procedure.

Technical details

• Display: 0.5-inch OLED, 88 × 48
• Operating supply stated: DC 3.5–30V
• Measurement range: DC 0–30V
• Current draw stated: Under 20 mA
• Accuracy stated: About 0.7%
• Refresh: 5 Hz, configurable 10 Hz
• Options: Standard or ultra-thin
• Quantity: One meter

Check the wiring and voltage limits before adding a compact readout to your project.

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