This document describes a low-cost compact LCD voltmeter module that is ideally suited for high-volume applications. It features an exceptionally large display in a miniature package and includes auto-zero and auto-polarity functions.
The V125 module is a low‑cost, compact LCD voltmeter designed for high‑volume applications. It offers a 12.5 mm (0.5") digit height, auto‑zero, auto‑polarity and user‑selectable decimal points, and is supplied with a panel‑mounting bezel.
The manual includes electrical specifications, safety guidelines, dimensions, panel fitting details, functional block and circuit diagrams, as well as scaling instructions and application notes for proper installation and use.
| Accuracy (overall error) | 0.25 % (+3 counts) |
|---|---|
| Linearity (0‑1000 reading) | +3 counts |
| Linearity (0‑2000 reading) | +5 counts |
| Sample rate | 3 samples/sec |
| Operating temperature range | 0 °C to 50 °C |
| Supply voltage | 7 V to 12 V DC |
| Supply current | 1 mA to 2 mA |
Input voltages to the module’s pins must not exceed 60 V DC to comply with the Low Voltage Directive.
The module operates from a 7 V to 12 V DC power supply.
Connect the XDP pin to DP1, DP2, or DP3 to display Decimal Point 1, 2, or 3 respectively.
The module provides a 200 mV DC full‑scale reading.