ALLNET 4duino Touch Sensor (4duino_B08)

The ALLNET 4duino Touch Sensor (4duino_B08) is a capacitive touch sensor module based on the TTP223 controller chip. It provides a simple digital output that goes HIGH when the touch pad is activated, making it ideal for touch-sensitive input in microcontroller projects. The module includes an onboard LED indicator for visual feedback and operates over a wide voltage range from 2V to 5.5V DC.

Advantages

Easy to integrate with Arduino, Raspberry Pi, ESP32/ESP8266, and other microcontrollers. Low power consumption with quiescent current of only ~1.5 µA. Fast response time of less than 60 ms. Compact design with mounting holes for secure installation.

Suitable for

• Touch-sensitive user interfaces
• Home automation projects
• Interactive art installations
• Educational electronics kits

Key specifications

• Sensor Technology: Capacitive Touch
• Controller Chip: TTP223
• Number of Touch Channels: 1
• Operating Voltage: 2 V - 5.5 V DC
• Output Signal: Digital (HIGH/LOW)
• Output State on Touch: HIGH
• Output State No Touch: LOW
• On-board Indicator: LED for touch detection
• Interface Pins: VCC, GND, SIG
• Quiescent Current: ~1.5 µA (at 3V)
• Active Current: ~3.5 mA (at 3V, when touched)
• Output Drive Current: ~8 mA (at 3V)
• Response Time: < 60 ms (typical)
• Operating Temperature: -40°C to +85°C

Recommendations

For best performance, ensure stable power supply and avoid excessive noise on the touch pad. Use a 10kΩ pull-up resistor on the SIG pin if needed. Suitable for dry indoor environments.