Huidu HD-W3A Wi-Fi LED Control Card
The HD-W3A is a compact asynchronous controller for single-color and dual-color LED text displays. It is suited to door header screens, storefront signs, and other information displays that need wireless content updates. Connect to the card over Wi-Fi to edit programs using supported Huidu software or the Screen Control app.
Control capacity and compatibility
Choose the screen size according to its color mode. For a single-color display, the HD-W3A supports 1024 × 48 pixels or a wider 1280 × 32 layout. For a dual-color display, the specified control range is 768 × 32 pixels. These are different limits; the single-color width must not be assumed for a dual-color screen. Confirm the LED module interface, scan configuration, and finished screen dimensions before ordering.
| Specification | HD-W3A |
|---|---|
| Display type | Single-color or dual-color LED text display |
| Single-color control range | 1024 × 48 pixels; up to 1280 × 32 pixels for a wide layout |
| Dual-color control range | 768 × 32 pixels |
| Communication | Wi-Fi |
| HUB interfaces | 3 × HUB12 and 1 × HUB08 |
| Flash memory | 2 MB; about 900 KB available for use |
| Programs and areas | Up to 1,000 programs and 20 independent content areas |
| Content | Text, time, timers, counters, lunar calendar, and clock display |
| Brightness control | Manual, automatic with an optional brightness sensor, or by time period |
| Scheduled screen control | Timed screen on/off |
| Operating voltage | DC 3.3–5.5 V |
| Power | 3 W |
What you can show
- Create text programs with effects, program or area borders, and flexible layouts across up to 20 areas.
- Show a digital or analog clock, multiple time zones, lunar calendar, countdown or count-up information.
- Schedule the screen to turn on or off and select manual, time-based, or sensor-based brightness adjustment. Automatic light-based adjustment requires a compatible external brightness sensor.
Software and setup
Huidu lists HD2018, HD2020, HDsign, and the Screen Control app for configuring the HD-W3A/W4A series. Check the selected software version and screen parameters for your installation. The controller stores programs locally after they are sent over Wi-Fi, so a computer does not need to remain connected for normal playback.
Frequently asked questions
Can the HD-W3A control a dual-color LED sign?
Yes. The HD-W3A specification gives a dual-color control range of 768 × 32 pixels. Check module wiring and scan settings before installation.
What is the largest single-color layout?
The specified single-color layouts are 1024 × 48 pixels and 1280 × 32 pixels. The 1280-pixel width applies to the 32-pixel-high layout.
Does automatic brightness need an accessory?
Automatic light-based adjustment uses an external brightness sensor. Manual and time-period adjustment are also supported.
Images and specification
Download specification: Huidu HD-W3A Single-dual Color LED Wi-Fi Control Card Specification. For model information, see the Huidu HD-W3A/W4A manufacturer page.
Conclusion
Choose the HD-W3A when you need Wi-Fi program updates for a compact single-color or dual-color LED sign. Match the screen’s color mode, dimensions, HUB connection, and sensor requirements to the specifications above before purchasing.
