ET-A20
4-Button Pad
Four debounced tactile buttons in a D-pad layout
AED 9.00
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Overview
Four debounced tactile buttons in a D-pad layout
The ET-A20 is built around the 4× 5.1mm tactile, 160gf.
Designed in Dubai by ElectroTrical — the full schematic, BOM and design notes are published below.
Good for
- Menus and games
- Remote controls
- Simple user input
Key features
What makes it different
Buttons
4× 5.1mm tactile, 160gf
Conditioning
10k pull-ups + 10k/10nF RC per button
Use
Menus, game controls, D-pad layouts
Open documentation
Schematic, BOM and layout notes published for every board.
Breadboard friendly
Standard 2.54 mm pitch and M2.5 mounting holes.
Specifications
Technical specifications
| Buttons | 4× 5.1mm tactile, 160gf |
|---|---|
| Conditioning | 10k pull-ups + 10k/10nF RC per button |
| Use | Menus, game controls, D-pad layouts |
| Size | 25.4 × 25.4 mm |
|---|---|
| Mounting | 4 × M2.5 holes, 2.54 mm from each corner |
| Connectors | 6-pin 2.54 mm header |
| Revision | Rev A |
Performance
Buttons
Pinout
Pin map and connections
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VIN | Power | 3.3–5V (pull-up voltage) |
| 2 | GND | Ground | Ground |
| 3 | B1 | GPIO | Active low |
| 4 | B2 | GPIO | Active low |
| 5 | B3 | GPIO | Active low |
| 6 | B4 | GPIO | Active low |
Mechanical
Dimensions and what's in the box
In the box
- 1 × ET-A20 4-Button Pad (assembled)
- 1 × 6-pin 2.54 mm male header, unsoldered
Getting started
- Wire the header: VIN, GND, B1, B2, B3, B4
Compare
Which input board?
| 4-Button Pad (this board)This board | ET-A15 Rotary Encoder Breakout | ET-A18 16-Channel Analog Multiplexer | |
|---|---|---|---|
| What it does | Four debounced tactile buttons in a D-pad layout | EC11 encoder with push switch and hardware debounce | Read 16 analog or digital signals with one pin |
| Interface | — | 3 GPIO (interrupt-capable recommended) | — |
| Best for | Menus and games | Menu navigation | Many potentiometers or sensors |
| Price | 9 AED | 15 AED | 17 AED |
Downloads
Documents and design files
PDFET-A20 schematicRev A
STEP3D modelComing soon
Need a custom version of this board?
Different connector, size or sensor? We design and build custom variants.