DC 0-30V Mini Digital Voltmeter – OLED 12-Bit ADC Gaqqee
DC 0-30V Mini Digital Voltmeter – OLED 12-Bit ADC Gaqqee
Gaqqee Ultra-Slim Mini Digital Voltmeter – Precision Voltage Monitoring in a Compact Form Factor
Meet the Gaqqee DC 0–30V Ultra-Slim Mini Digital Voltmeter — a high-precision, space-saving voltage measurement module purpose-built for DIY electronics, embedded systems, industrial control panels, and automotive battery monitoring. Measuring just 37.5 × 15 × 3 mm, this sleek module slips effortlessly into tight enclosures while delivering professional-grade accuracy you can rely on.
Made in Mainland China.
Why You'll Love This Voltmeter
- Ultra-compact, ultra-slim profile – At only 3 mm thick, it integrates seamlessly into power supplies, control boards, and custom enclosures without sacrificing readability.
- 12-bit ADC high-precision sampling – Delivers approximately 0.7% measurement accuracy (e.g., a 10 V input displays with ≤0.07 V error), ensuring reliable and repeatable readings every time.
- Crisp 0.5-inch OLED display (88×48 resolution) – Bright white characters with auto-shifting decimal point make readings instantly clear, even in low-light environments.
- Adjustable refresh rate: 5 Hz / 10 Hz – Default 5 Hz is ideal for stable readings; short-circuit Pin B to switch to 10 Hz for real-time tracking of fast-changing voltage dynamics.
- Wide measurement & supply range – Measures DC 0–30 V; supply voltage DC 3.5–30 V; operating current <20 mA — efficient and versatile.
- Configurable jumper settings – Jumper A toggles the voltage "V" symbol on/off; Jumper B switches refresh rate — customize the display to suit your project.
- CE & RoHS certified – Meets international safety and environmental standards.
Key Specifications
| Measurement Range | DC 0–30 V |
| Supply Voltage | DC 3.5–30 V |
| Operating Current | <20 mA |
| ADC Resolution | 12-bit |
| Measurement Accuracy | ≈0.7% |
| Display | 0.5-inch OLED, 88×48 px, white characters |
| Refresh Rate | 5 Hz (default) / 10 Hz (Pin B jumpered) |
| Dimensions | 37.5 × 15 × 3 mm |
| Certifications | CE, RoHS |
| Country of Origin | Mainland China |
Jumper Configuration Guide
- Jumper A (open – default): Voltage symbol "V" is displayed. Jumper A (closed): "V" symbol hidden.
- Jumper B (open – default): 5 Hz refresh rate. Jumper B (closed / short-circuited): 10 Hz refresh rate for dynamic voltage tracking.
Ideal Applications
- Adjustable bench power supply voltage display
- Industrial control equipment panels
- Sensor supply voltage monitoring
- Vehicle/battery voltage monitoring
- DIY electronics & embedded system projects
- Robotics and maker projects
What's in the Box
- 1× Ultra-Slim Mini Digital Voltmeter Module
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Frequently Asked Questions
Q: What voltage range can the mini digital voltmeter measure?
A: The Gaqqee mini digital voltmeter measures DC 0–30 V. It requires a supply voltage of DC 3.5–30 V and consumes less than 20 mA during operation, making it suitable for a wide range of electronics and embedded applications.
Q: How do I switch the refresh rate from 5 Hz to 10 Hz?
A: Simply short-circuit (jumper) Pin B on the module. By default the refresh rate is 5 Hz, which is great for stable voltage displays. Shorting Pin B switches it to 10 Hz, enabling faster real-time tracking of changing voltage levels.
Q: Can this voltmeter be embedded into a custom enclosure or power supply?
A: Absolutely. At just 37.5 × 15 × 3 mm, the ultra-slim profile is specifically designed for embedded integration into adjustable power supplies, control panels, battery monitors, robotics projects, and any compact DIY electronics build.
Q: What does the 12-bit ADC mean for measurement accuracy?
A: The 12-bit ADC provides high-resolution analog-to-digital conversion, resulting in approximately 0.7% measurement accuracy. For example, at a 10 V input, the display error is no more than ±0.07 V — highly reliable for electronics testing and monitoring.
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.