The DC 4-40V LED Digital Voltmeter measures DC (Direct Current) voltage from 4V to 40V and shows the reading on a bright LED (Light Emitting Diode) digital display. The mini led digital voltmeter uses direct voltage sensing — you connect the two probes across the voltage source and the reading appears immediately on screen. No calibration is needed. No coding required. Just wire it in and read.
The digital led voltmeter draws its operating power directly from the measured circuit, which is a detail worth knowing. If the source voltage drops below 4V, the module goes dark and shows nothing. That is the honest limitation — it cannot measure voltages below its own minimum operating threshold of 4V DC. One non-obvious detail — the LED display is bright enough for outdoor and workshop use but can appear washed out in direct sunlight unless viewed at a slight angle.
The 40v digital voltmeter panel-mounts into standard cutouts and is used in DIY power supply builds, battery testers, solar charge monitors, and lab bench setups. To start, connect the positive and negative leads to your DC source, and the display lights up with the voltage reading. StemVolt supplies this module tested with a stable confirmed display at all points in the 4V to 40V range.
Related Products:
Check out the Digital LED DC Voltmeter Ammeter 100V 100A
Features:
- Voltage range from DC 4V to 40V covers single-cell lithium, 12V lead acid, and 24V DC systems
- LED digital display type gives a clear bright readout visible from a distance in indoor environments
- Direct voltage sensing method needs no external components making wiring simple and quick
Technical specifications:
| Specification | Details |
|---|---|
| Voltage Range | DC 4–40V |
| Display Type | LED Digital Display |
| Input Voltage | DC 4V – 40V |
| Operating Method | Direct Voltage Sensing |
| Accuracy | High, stable readings |
| Power Consumption | Low |
Applications:
- Battery level indicator uses this to show remaining voltage on a 12V lead acid battery clearly
- DC 4-40V LED Digital Voltmeter monitors solar panel output voltage across the day on a wall panel
- 40v digital voltmeter reads DC bus voltage in a motor driver and triggers a low-voltage alert relay
- DIY bench power supply uses this display to show output voltage during adjustable regulator testing
Package includes:
- 1 x DC 4-40V LED Digital Voltmeter
Reviews
Clear filtersThere are no reviews yet.