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 provide module tested with a stable confirmed display at all points in the 4V to 40V range.
Related Products:
- Checkout the Digital LED DC Voltmeter Ammeter 100V 100A
Features:
- 4V to 40V direct sensing covers 12V 24V and 36V battery packs
- Self-powered from measured voltage — no external power supply needed
- Bright LED digital display readable at distance in all light conditions
- Two-wire connection — install across supply without shunt or wiring modification
- Low power draw suits always-on battery state-of-charge indicator builds
Technical specifications:
Applications:
- DC 4-40V Voltmeter used for 12V car battery voltage display panel
- Project uses dc digital voltmeter for DC power supply readout
- E-bike dashboard uses mini led digital voltmeter for 36V pack monitor
- Solar system uses digital led voltmeter for battery charge level display
- Lab bench uses dc voltmeter 4-40v for variable DC supply voltage check
Package includes:
- 1 x DC 4-40V LED Digital Voltmeter
Sandhya Iyengar –
Product intact received
Bikram Samanta –
Bought from my favourite STEM store, product arrived intact and worked perfectly for monitoring power supplies during science project testing and development.
Suresh Kohli –
Online payment was easy and support team responded quickly, making the overall purchase experience smooth and reliable
Vijay Shrivastava –
Prompt delivery service
Milind Chitnis –
Received this digital voltmeter with fast delivery, display brightness was excellent and voltage readings were accurate for my STEM project setup.
Krutika Solanki –
Impressed with quality
Pritha Mukherjee –
Exactly as described
Arvind Chawla –
This voltmeter provides clear and accurate voltage readings, making it useful for STEM projects, power supply monitoring, and electronics experiments