Voltmete Module with 7 Segment 0.28 inch 0-100V (3 Wires)

Overview

The Voltmete Module with 7 Segment 0.28 inch 0-100V (3 Wires) is a compact and precise digital voltmeter designed for real-time voltage measurement in DC circuits. It features a bright and clear 0.28-inch 7-segment LED display, making it easy to read even in low-light conditions. This module is widely used in battery monitoring, DIY electronics, power supply testing, and automation projects. With its simple 3-wire connection and wide measurement range,  delivers accuracy, reliability, and convenience for both professionals and hobbyists.

Key Features

• Measurement Range: 0V to 100V DC — suitable for most low and medium voltage applications.

• Display: Bright 0.28-inch 7-segment LED — ensures clear visibility from multiple angles.

• Wiring Type: 3-wire system for easy integration and accurate readings.

• Power Supply Voltage: DC 4.5V–30V — allows flexibility in powering the module.

• Display Color: Available in red, green, or blue variants depending on model.

• Accuracy: ±0.1V — provides reliable and precise voltage measurement.

• Refresh Rate: Rapid response for real-time monitoring.

Applications

 is used in various electronic systems, including:

• Battery level monitoring in portable power systems.

• Voltage display in DC power supplies and chargers.

• Automotive and solar energy systems for voltage tracking.

• DIY electronic projects and robotics applications.

• Industrial panels and automation control systems.

Advantages

• Compact and lightweight design suitable for embedded circuits.

• Easy 3-wire connection for quick installation.

• Low power consumption and long operational life.

• High display brightness for indoor and outdoor readability.

• Accurate, real-time voltage readings for precise diagnostics.

Technical Specifications (Data Sheet)

Wiring Guide

• Red Wire: Power supply positive (+Vcc)

• Black Wire: Ground (GND)

• Yellow/White Wire: Voltage input for measurement (Vin)

Usage Notes

• Ensure correct polarity during wiring to prevent damage.

• The measured voltage must not exceed 100V DC.

• For voltages under 4.5V, use a separate power source for stable operation.

• Suitable for both standalone projects and integrated monitoring systems.

Conclusion

) is a reliable and efficient solution for monitoring voltage in a wide range of electronic and industrial applications. With its clear LED display, easy installation, and accurate measurement, it is ideal for engineers, students, and DIY enthusiasts. Whether used for testing, automation, or battery monitoring, this digital voltmeter provides the perfect balance of performance, precision, and simplicity.