Mini Digital Voltmeter DC 3-30V 3 Digits 0.56″ 3 Wire LED Panel Blue
Specifications:
- Compact mini digital voltmeter with 0.56″ LED display for clear readings
- Measures DC voltage from 3V to 30V (supports up to 100V with three-wire access)
- High precision with ±1% tolerance for reliable measurement results
- Bright blue LED display ensures visibility in all lighting conditions
- Low starting operating voltage, requires minimum 5V to power on
- Ideal for DIY electronics, power supply monitoring, and battery projects
Original price was: 165৳ .145৳ Current price is: 145৳ .
23 in stock
23 in stock
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Description
🔵 Mini Digital Voltmeter DC 3–30V
3 Digits | 0.56″ LED | 3-Wire | Blue Display
📌 Overview
The Mini Digital Voltmeter DC 3–30V is a compact panel-mounted voltage measuring module designed to monitor DC voltage in real time. It features a bright 0.56-inch blue LED display with a 3-digit readout, making it ideal for DIY electronics, battery monitoring, and embedded systems projects.
🔢 Display Specifications
| Feature | Specification |
|---|---|
| Display Type | 7-Segment LED |
| Digit Count | 3 Digits |
| Digit Size | 0.56 inch |
| Display Color | Blue |
| Resolution | 0.1V |
| Reading Format | XX.X |
Example Display:
-
5.0V
-
12.4V
-
24.8V
⚡ Electrical Specifications
| Parameter | Value |
|---|---|
| Measuring Range | DC 3V – 30V |
| Operating Voltage | DC 3V – 30V |
| Measurement Accuracy | ±1% |
| Refresh Rate | ~200ms |
| Power Consumption | Low |
⚠️ Minimum input voltage required to power the display: ~3V.
🔌 Wire Configuration (3 Wire Type)
The module uses three wires:
| Wire Color | Function |
|---|---|
| Red | Positive Power Supply (+) |
| Black | Ground (–) |
| Blue | Voltage Measurement Input |
How It Works:
-
Red & Black power the module.
-
Blue wire connects to the voltage you want to measure.
-
For simple applications, red and blue can be connected together.
📏 Physical Specifications
-
Compact rectangular plastic housing
-
Panel mount design (snap-in type)
-
Lightweight
-
Durable ABS casing
-
Clear acrylic display window
Typical Size (Approx):
-
Length: ~48mm
-
Width: ~29mm
-
Height: ~22mm
💡 Features
✔ Bright blue LED display
✔ Easy panel installation
✔ Compact size
✔ Low power consumption
✔ Real-time voltage monitoring
✔ High visibility even in low light
🔋 Applications
-
Battery voltage monitoring
-
Power supply testing
-
Solar panel systems
-
DIY power banks
-
Automotive voltage monitoring
-
Robotics projects
-
Industrial control panels
-
DC adapter testing
🛠 Working Principle
-
The module receives DC voltage.
-
Internal ADC (Analog to Digital Converter) measures voltage.
-
Microcontroller processes the signal.
-
7-segment LEDs display voltage value.
🔎 Advantages
-
Simple wiring
-
Affordable
-
Accurate for general applications
-
Suitable for hobbyists and professionals
-
No external calibration required (usually pre-calibrated)
⚠️ Important Notes
-
Do not exceed 30V input.
-
Not suitable for AC voltage measurement.
-
Ensure correct polarity connection.
-
For voltages below 3V, display may not power on.
🆚 Comparison: 2-Wire vs 3-Wire Voltmeter
| Feature | 2-Wire | 3-Wire |
|---|---|---|
| Independent Power | No | Yes |
| Low Voltage Accuracy | Lower | Better |
| Flexibility | Limited | High |
3-wire version is more stable and flexible.
Customer Reviews
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