Description

High-Precision 0.28-inch LED Voltage Display

Technical Specifications of Mini DC Digital Voltmeter 4V-30V

• Measuring Range: Accurately detects direct current between 4.0V and 30V without external power.

• Display Type: Features a bright 0.28-inch Red LED screen for clear visibility in dark environments.

• Accuracy Rate: High precision measurement with a low error margin of only 3 per thousand.

• Current Consumption: Extremely efficient operation requiring less than 20mA during active display.

• Refresh Rate: Fast detection speed updating measurements every 200 milliseconds for real-time monitoring.

• Dimensions: Ultra-compact footprint measuring 33 x 10.7 x 8.2 mm for tight installations.

• Protection: Integrated reverse polarity protection prevents board burnout if wires are switched.

• Application: Use this Mini DC Digital Voltmeter 4V-30V for battery health tracking.

Usage and Wiring Integration

• First, connect the red wire to the positive terminal of the power source.

• Next, attach the black wire to the negative ground terminal for a complete circuit.

• Then, verify that the LED display illuminates immediately with a numeric voltage reading.

• Afterward, mount the module into a 28.5 x 10 mm panel cutout for a professional finish.

• Consequently, monitor car batteries, solar systems, or DIY power supplies with ease.

• Finally, utilize the self-powered 2-wire design to simplify your project’s cable management.

Advantages and Disadvantages of Mini DC Digital Voltmeter 4V-30V

• Pros: Does not require a separate power supply because it draws energy from the measured source.

• Furthermore, the ultra-miniature size allows it to fit inside almost any portable electronic housing.

• Cons: The display will not function if the input voltage drops below the 4V minimum threshold.

• Additionally, exceeding the 30V limit for extended periods may cause permanent internal damage.

Precautions and Installation Safety

• Warning: Never apply more than 30V to the 2-wire configuration to avoid chip failure.

• Avoid exposing the delicate LED display to high humidity or direct liquid contact.

• Ensure the mounting surface is non-conductive to prevent short circuits on the exposed rear PCB.

What is Included in the Package

• 1x Mini DC Digital Voltmeter 4V-30V with pre-attached 2-wire cable.

• Built-in mounting ears for quick and secure snap-in installation to panels.

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