ALLNET 4duino 8 Channel Capacitive Touch Button Switch Board (ALL_OY_3422)

The ALLNET 4duino 8 Channel Capacitive Touch Button Switch Board (ALL_OY_3422) is a versatile and easy-to-use capacitive touch sensor module designed for Arduino, Raspberry Pi, ESP32, ESP8266, and other microcontrollers. It features 8 capacitive touch channels controlled by the TTP229 chip, providing both parallel and serial output interfaces. The board includes 8 channel status LEDs and a power LED for visual feedback. With a wide operating voltage range of 2.4V to 5.5V DC and low power consumption, it is ideal for human-machine interface (HMI) applications, DIY electronics, and smart home automation.

Advantages

This touch button switch board offers reliable capacitive sensing with auto-calibration, eliminating the need for mechanical buttons. Its dual output modes (momentary and latching) provide flexibility for various projects. The compact design with standard 2.54mm pin headers ensures easy integration with breadboards and prototyping boards.

Suitable for

• Human-Machine Interface (HMI) projects
• DIY electronics and hobbyist projects
• Smart home automation systems
• Educational kits and prototyping

Key specifications

• Controller Chip: TTP229
• Number of Channels: 8
• Operating Voltage: 2.4V - 5.5V DC
• Output Interface: Parallel (8 individual outputs), Serial (2-wire interface)
• Output Signal Type: Digital (High on touch, Low on release)
• Output Mode: Momentary (default), Latching (configurable via jumpers)
• Response Time: Approx. 60ms (Fast Mode), 160ms (Low Power Mode)
• Current Consumption (Idle): Approx. 2.5µA (Low Power Mode, no touch)
• Current Consumption (Active): Approx. 10mA (5V operation, active)
• Indicator LEDs: 8 x Channel Status LEDs, 1 x Power LED
• Connectivity: Standard 2.54mm Pin Headers
• Compatibility: Arduino, Raspberry Pi, ESP32, ESP8266, Microcontrollers
• Detection Method: Capacitive Sensing
• Auto Calibration: Yes
• Operating Temperature: -20°C to +70°C
• Mounting Holes: 4 x M2.5
• PCB Material: FR-4

Recommendations

For best performance, ensure proper grounding and avoid placing the board near large metal objects. Use the serial interface for projects requiring fewer I/O pins. Configure latching mode via jumpers for toggle switch applications.