DVB01 Digital Voltage Comparator Module DC 5V 12V 24V Display

DVB01 Digital Display Window Voltage Comparator Module

Take full control of your voltage monitoring with the ALLOYSEED DVB01 Digital Voltage Comparator Module. Engineered for hobbyists, engineers, and electronics professionals alike, this compact yet powerful module delivers high-precision voltage measurement, charge/discharge monitoring, and relay control — all in one easy-to-use package. Whether you're managing battery systems, power supplies, or custom automation circuits, the DVB01 has you covered.

Made in Mainland China.

Why Choose the DVB01 Voltage Comparator Module?

• High Precision Measurement: Measures DC voltages from 0–99.9V with an accuracy of ±0.1V, giving you reliable, real-time readings you can trust.
• Wide Input Voltage Range: Compatible with DC 5V, 12V, and 24V working voltages — perfect for a broad range of circuits and applications.
• 5 Selectable Functions: Choose from voltage measurement, charge monitoring, discharge monitoring, interval suction, or outside-interval relay control to match your exact needs.
• Fast Response Time: Ideal for high-frequency signal processing and real-time sensor feedback control applications.
• Low Power Consumption: Draws less than 3mA in display-off mode, extending battery life and reducing energy costs.
• Adjustable Delay Functions: Set 0–99.9 second delayed relay engagement and disengagement for fine-tuned automation control.
• Non-Volatile Memory: All user-defined parameters are saved automatically — settings are retained even after a power cycle.
• Auto Power Saving: Built-in automatic power saving mode that users can configure independently.

Module Functions at a Glance

1. Voltage Measurement: Relay remains inactive; digital display shows the live measured voltage.
2. Charge Monitoring: Relay engages when voltage drops below the lower limit; disengages when it exceeds the upper limit.
3. Discharge Monitoring: Relay engages when voltage exceeds the upper limit; disengages when it falls below the lower limit.
4. In-Interval Mode: Relay engages when voltage is between the upper and lower limits; disengages otherwise.
5. Out-of-Interval Mode: Relay engages when voltage is outside the set limits; disengages when within range.

Technical Specifications

Module Interface Guide

Voltage Input (4-wire terminal block):

• DC+ — Positive pole of DC power supply
• DC– — Negative pole of DC power supply
• V+ — Measurement voltage positive pole
• V– — Measurement voltage negative pole

Relay Load Output (3-wire terminal block):

• NO — Normally Open relay interface
• COM — Relay common interface
• NC — Normally Closed relay interface

Package Contents

• 1× DVB01 Digital Voltage Comparator Module

Safety & Standards Reference

For guidance on safe use of electronic components and electrical safety standards in DIY and professional environments, refer to the U.S. Consumer Product Safety Commission – Electrical Safety Resources. Always follow proper electrical safety practices when working with relay modules and live circuits.

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Learn more: Module

Frequently Asked Questions

Q: What working voltages are compatible with the DVB01 digital voltage comparator module?

A: The DVB01 module supports three working voltages: DC 5V, 12V, and 24V. You can select the appropriate supply voltage for your circuit. Note that the supply voltage should not exceed the rated voltage by more than ±10% to ensure stable and safe operation.

Q: Can the DVB01 module be used to protect batteries during charging and discharging?

A: Yes! The DVB01 includes dedicated charge monitoring (Function 2) and discharge monitoring (Function 3) modes. You simply set your upper and lower voltage limits, and the relay automatically engages or disengages to protect your battery or power source from overcharge or over-discharge conditions.

Q: Will my settings be lost if the power is cut?

A: No. The DVB01 features non-volatile parameter storage, meaning all user-configured settings — including voltage limits, function selection, and delay times — are automatically saved and will be retained even after a power outage or intentional power-down.

Q: What is the maximum voltage the DVB01 can measure?

A: The DVB01 has a measurement range of DC 0–99.9V with an accuracy of ±0.1V, making it suitable for a wide variety of battery systems, power supplies, and voltage monitoring applications.