4-Way Key Switch Module - Multi-Button Digital Input Board for Arduino Control Panels
The HS-KEY4B 4-Way Key Switch Module provides four separate button inputs on one compact board, making it useful for menu navigation, robot controls, game controllers, mode selection, and classroom input experiments. Instead of wiring four individual switches, the module gives a tidier multi-key interface for microcontroller projects.
It pairs naturally with the ELAB Nano V3, UNO R3 Prototype Expansion Board, and output devices such as the RGB Full Color LED Module. For touch-based input, compare it with the TTP223 Capacitive Touch Switch Sensor Module.
Use software debouncing for clean button events and confirm whether each key is active-high or active-low before writing final UI logic.
Technical Specifications
| Parameter | Value |
|---|---|
| SKU | HS-KEY4B |
| Product Type | 4-way key switch module |
| Inputs | 4 independent pushbutton inputs |
| Output Type | Digital button states |
| Typical Supply | 3.3V / 5V controller logic systems |
| Interface | Power, ground, and key signal lines depending on board label |
| Use Cases | Menus, robot controls, mode selection, game input |
| Host Requirement | GPIO inputs |
| Software Need | Debouncing recommended |
| Mounting | Panel or board-mounted button interface |
Board Layout & Label Guide
- Key 1-4 - Four physical pushbuttons for user input.
- Signal Pins - Button outputs to controller GPIO pins.
- VCC - Logic supply if required by the board.
- GND - Ground reference.
- Common Trace - Some button boards share common ground or VCC.
- Mounting Holes - Secure the board for reliable button feel.
- Debounce Note - Mechanical switches bounce and need filtering.
- Logic Note - Confirm active-high or active-low behavior by testing.
Application Scenarios
1. Arduino Four Button Read
Print which button is pressed.
2. Menu Navigation
Use four buttons as up, down, select, and back.
3. MicroPython Button Scan
Scan four buttons on a Pico-style board.
Packing List
- 1 x 4-Way Key Switch Module
FAQ
Q: How many buttons are on the module?
A: There are four key switches.
Q: Does it output analog values?
A: No, it is intended for digital button states.
Q: Do I need debounce?
A: Yes, debounce in software for clean events.
Q: Can I use internal pull-ups?
A: Yes, if the board wiring suits active-low input.
Q: Can it be used for menus?
A: Yes, it is well suited for menu navigation.
Q: Can it work with 3.3V controllers?
A: Usually yes for simple switch inputs, but verify the wiring.
Q: Why do buttons read backwards?
A: The module may be active-low depending on wiring.
Q: What should I test first?
A: Pin mapping, active level, and debounce timing.