Description
Disclaimer (Digital Product)
This product is a digital production pack, not a physical or assembled PCB. You will receive Gerber files, BOM, Schematics and documentation required to manufacture the PCB Module. No physical boards are shipped.
Download Product Datasheet: Download Now
Overview
The MX3I1 – 3-Channel Capacitive Touch Sensor Module is a compact and reliable solution for implementing touch-based user interfaces in embedded systems. Based on the CAP1203 IC, this module provides three independent capacitive touch inputs that can be used with PCB pads, wires, or external conductive surfaces.
Designed for seamless integration, the module communicates over the I²C interface and is compatible with popular microcontrollers such as Arduino, ESP32, STM32, and more. With built-in automatic calibration and environmental drift compensation, the MX3I1 ensures stable and consistent touch detection across different operating conditions.
This module is ideal for replacing mechanical buttons with touch inputs in modern electronic designs, offering improved durability and a clean user experience.
Key Features
- 3 independent capacitive touch input channels
- I²C interface (fixed address: 0x28)
- Operating voltage: 3.3V to 5V compatible
- Built-in automatic calibration and drift compensation
- Configurable sensitivity via register settings
- Active-low interrupt output (ALERT, optional use)
- Breadboard-friendly and compact design
Applications
- Touch-based buttons and control panels
- Smart home and IoT interfaces
- Menu navigation systems
- Appliance touch controls
- DIY electronics and educational projects
What You Will Receive (Digital Download)
This product pack will include:
- PCB Gerber File
- Bill of Materials (BOM)
- Pick and Place (CPL)
- Full product datasheet
- Documentation pack (README, License, T&C)
These files can be directly uploaded to PCB manufacturers such as JLCPCB, PCBWay and other manufacturers for fabrication.
Why Choose MX3I1?
The MX3I1 is designed with ease of use and reliability in mind. Unlike raw IC implementations, this module provides a ready-to-use solution with standardised pin headers, stable power design, and compatibility with both 3.3V and 5V systems.
Whether you’re building a prototype or a production-ready design, the MX3I1 helps you implement touch input quickly and efficiently.
Pinout Description
| Pin | Label | Function |
| 1 | VCC | Power supply (3.3 V – 5 V) |
| 2 | GND | Ground |
| 3 | SCL | I²C clock line |
| 4 | SDA | I²C data line |
| 5 | ALERT | Active-low interrupt output (optional) |
PCB Layout & Dimensions
| Parameter | Value |
| Board Size | 46mm x 14mm |
| Layers | 2 |
| Components Placement | Top layer (Single side) |
| Pin Pitch | 2.54 mm |
| Pin Header | 1×7 Male |
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