Gaqqee Mini Digital Voltmeter DC 0-30V OLED 12-Bit ADC
Gaqqee Mini Digital Voltmeter DC 0-30V OLED 12-Bit ADC
Gaqqee Ultra-Slim Mini Digital Voltmeter – DC 0–30V with 0.5" OLED Display
Meet the Gaqqee Ultra-Slim Mini Digital Voltmeter — a compact, high-precision voltage meter built for makers, engineers, and hobbyists who need accurate DC voltage readings in tight spaces. With a 12-bit ADC and a crisp 0.5-inch OLED display, this tiny powerhouse fits effortlessly into panels, enclosures, and embedded projects without sacrificing readability or accuracy.
Key Features
- Ultra-Compact Form Factor: Measures just 37.5 × 15 × 3 mm — slim enough to embed into virtually any device or control panel with minimal footprint.
- 12-Bit ADC High Precision: Delivers approximately 0.7% measurement accuracy (e.g., ±0.07V at 10V input), ensuring reliable and trustworthy voltage readings every time.
- 0.5-Inch OLED Display (88×48): Bright white characters on a crisp OLED screen provide clear, intuitive readings even in low-light environments.
- Adjustable Refresh Rate: Default 5 Hz refresh rate for stable readings; easily switchable to 10 Hz by shorting pin B for real-time tracking of dynamic voltage changes.
- Wide Measurement Range: Measures DC 0–30V with a supply voltage of DC 3.5–30V and an operating current of less than 20 mA.
- Flexible Jumper Configuration: Jumper A toggles the voltage (V) symbol on/off; Jumper B switches between 5 Hz and 10 Hz refresh rates — no software needed.
- CE & RoHS Certified: Meets international safety and environmental standards.
- No High-Concern Chemicals: Fully compliant with RoHS hazardous substance restrictions.
Technical Specifications
| Supply Voltage | DC 3.5–30V |
| Measurement Range | DC 0–30V |
| Operating Current | <20 mA |
| Refresh Rate | 5 Hz (switchable to 10 Hz via Jumper B) |
| Measurement Accuracy | ~0.7% |
| Display | 0.5-inch OLED, 88×48 resolution, white characters |
| Dimensions | 37.5 × 15 × 3 mm |
| Certifications | CE, RoHS |
| Country of Origin | Made in Mainland China |
Jumper Configuration Guide
- Jumper A (Open): Voltage symbol (V) is displayed — default setting.
- Jumper A (Shorted): Voltage symbol (V) is hidden — for cleaner panel aesthetics.
- Jumper B (Open): Refresh rate at 5 Hz — stable display for steady voltages.
- Jumper B (Shorted): Refresh rate switches to 10 Hz — ideal for monitoring rapidly changing voltages.
Ideal Applications
- Adjustable power supply output voltage display
- Industrial control equipment monitoring
- Sensor supply voltage detection
- Vehicle or battery voltage monitoring
- DIY electronics and embedded projects
- 3D printer and CNC machine power monitoring
What's in the Box
- 1× Gaqqee Ultra-Slim Mini Digital Voltmeter
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Frequently Asked Questions
Q: What is the measurement range of this mini digital voltmeter?
A: The Gaqqee Ultra-Slim Mini Digital Voltmeter measures DC voltages from 0V to 30V, making it suitable for a wide range of low-voltage electronics applications including power supplies, battery monitoring, and embedded systems.
Q: How do I switch the refresh rate from 5 Hz to 10 Hz?
A: Simply short-circuit (jumper) pin B on the device. This switches the display refresh rate from the default 5 Hz to 10 Hz, enabling faster, real-time tracking of dynamic voltage changes without any software configuration required.
Q: What power supply does this voltmeter require?
A: The voltmeter requires a DC supply voltage between 3.5V and 30V, and draws less than 20 mA of operating current, making it highly efficient and easy to power from the same circuit it is monitoring.
Q: Is this voltmeter suitable for embedding into a custom enclosure or panel?
A: Yes — at just 37.5 × 15 × 3 mm, this ultra-slim voltmeter is specifically designed for panel mounting and embedded integration. Its compact profile and jumper-configurable display make it ideal for custom DIY electronics builds, control panels, and industrial enclosures.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.