Huidu HD-W3A Wi-Fi controller for single- and dual-color LED signs
The Huidu HD-W3A is a Wi-Fi LED control card for shop signs, doorway displays and information boards. Update text and clock programs by connecting a phone or laptop to the card’s Wi-Fi hotspot. Its function table documents separate single-color and dual-color screen limits.
HD-W3A technical specifications
| Single-color control range | 1280 × 32 or 1024 × 48 pixels |
|---|---|
| Dual-color control range | 768 × 32 pixels |
| Display connections | HUB12 (black) and HUB08 (yellow) |
| Communication | Wi-Fi hotspot connection |
| PC / mobile software | HDSign / LedArt and LedArt lite |
| Flash memory | 2 MByte; practical usable space 900 KByte |
| Programs / areas | Up to 1,000 programs / 20 independent areas |
| Display content | Text, time, counting and lunar calendar; sequential display |
| Brightness modes | Manual, automatic and scheduled adjustment; brightness-sensor connection available |
| Scheduled screen control | Timer on/off supported |
| Voltage / power | DC 3.3–5.5 V; standard 5 V recommended / 3 W |
| Operating temperature / humidity | −40°C to +80°C / 0–95% RH |
| Storage temperature | −40°C to +105°C |
Programming and scheduled operation
Use HDSign on a PC or LedArt/LedArt lite on a mobile device to configure the sign and distribute programs. Up to twenty areas can use separate effects and borders. Digital and dial clocks, multiple time zones and timed screen switching support routine signage schedules.
Before ordering, match the sign color mode, pixel dimensions and HUB12/HUB08 connection. The basic voltage range is DC 3.3–5.5 V, while the connection instructions recommend a standard 5 V supply. Check polarity and the module wiring before installation.


HD-W3A FAQ
Does the Huidu HD-W3A support dual-color signs?
Yes. The V1.0 function table lists 768 × 32 pixels for dual-color displays. For single-color signs it lists 1280 × 32 or 1024 × 48 pixels. Check the module and HUB wiring for the selected configuration.
Which software is used to program the W3A?
The specification lists HDSign on a PC and LedArt or LedArt lite on a phone. After the card is powered on, connect the phone or laptop to the card’s Wi-Fi hotspot to configure the display or update programs.
Can W3A switch the screen on and off automatically?
Yes. It supports scheduled screen on/off and brightness adjustment by time period, as well as manual and automatic brightness modes. The P7 connection is provided for a brightness sensor.
Can the HD-W3A play full-color video?
The documented functions are for single- and dual-color information signs showing text, time, counting and lunar-calendar content. The specification does not list full-color video playback.
Download specification
Huidu HD-W3A Single-dual Color LED Wi-Fi Control Card Specification






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