0.28 Inch DC 0100V 2Wire Mini LED Voltage Meter
Compact Digital Panel Voltmeter for DC Monitoring
This mini 0.28 inch LED display voltmeter measures DC voltage from 0V to 100V using a simple 2-wire connection. It provides clear digital readout for battery monitoring, power supply testing, and DIY electronics projects.
Wide 0100V Range Monitors various DC voltage levels
UltraCompact 0.28 inch LED for tight spaces
The 2-wire design means power and measurement share the same wires
Connect directly to the voltage source you want to monitor
Do not exceed 100V input
Technical Specifications
| Parameter | Value |
|---|
| Display | 0.28 inch LED |
| Voltage Range | 0V to 100V DC |
| Power Supply | 4.5V to 30V DC |
| Wiring | 2-Wire (VCC and GND) |
| Color | Red / Blue / Green |
| Accuracy | ±0.5% |
| Dimensions | 22mm x 11mm x 6mm |
= Key Features =
Universal DC Measurement - 0V to 100V range
Simple 2Wire Connection Easy installation
Wide Power Supply Range - 4.5V to 30V
Power Reverse Protection - Prevents damage from wrong polarity
Low Power Consumption - Draws 30mA typical
Mini Display - Fits in small panels
= Applications =
- Battery voltage monitoring
- Power supply output indication
- Solar panel system voltage display
- Car and motorcycle battery check
- Generator output monitoring
- Portable electronics projects
Versatile Use - Monitors many DC systems
Simple Wiring - Only two wires needed
√ Panel mountable
√ Self-contained module
√ Great for battery monitoring
Connection Guide
Two wires:
- Red wire: VCC (4.5V to 30V positive power and test)
- Black wire: GND (Ground)
Connection is simple:
- Connect red wire to positive side of source
- Connect black wire to negative side (ground)
- Meter will display voltage reading
The meter powers itself from the measured voltage
Ensure source voltage is between 4.5V and 30V
Never exceed 100V on the red wire
Double-check polarity before connecting
Understanding the 2-Wire Design
The 2-wire design simplifies installation:
- Both power and measurement share the same wires
- No separate power supply needed
- Works when measured voltage is 4.5V to 30V
- Built-in voltage regulator for stable display
No External Power Needed - Powered by measured source
UltraSimple Wiring Only two connections
Common in automotive applications
Perfect for portable devices
√ Built-in reverse polarity protection
√ Good accuracy within the range
Installation Tips
For panel mounting:
- Drill a hole for the meter
- Secure with mounting bracket
- Route wires carefully
For portable use:
- Solder wires directly to source
- Use heat shrink for insulation
- Secure meter in enclosure
Use proper wire gauge for your application
Mount in visible location for easy reading
Avoid short circuits during installation
Protect wires from sharp edges
Troubleshooting
No display:
- Check voltage is 4.5V to 30V
- Verify polarity
- Avoid loose connections
Display reads "0V" or no change:
- Check voltage source
- Ensure connection is secure
- Avoid using below 4.5V
Inaccurate reading:
- Measure voltage directly with a multimeter
- Check for electrical noise
- Avoid voltage drop in wires
