Grove I2C Touch Sensor - 12-channel module with a touch sensor

Description

Module with a 12-channel capacitive touch sensor MPR121. The sensor combines two functions: capacity measurement and touch detection. Constant current capacitance sensing allows you to measure capacitances from 10 pF to over 2000 pF with a resolution of 0.01 pF. After collecting data on the electrode capacity, the sensor determines whether the electrode has been touched or released by comparing it with a baseline value of the capacity. The module has 12 completely independent electrodes with built-in auto-configuration and an output that generates a break. To each of the channels, the user can connect a touch probe (4 touch feelers in kit) and create a touch keyboard. The board is equipped with a Grove connector, so it can be used with the Base Shield V2 and Arduino extension. The module communicates via the I2C interface and is supplied with the voltage of 3.3 V or 5 V. Full documentation of the module with examples of use is available on the product page.

Features

• Internal 10-bit ADC
• Integrated independent auto-calibration for each electrode input
• Completely independent electrodes with built-in auto-configuration
• I2C interface, with IRQ interrupt, interrupt output informing about the change of the electrode state
• 12 inputs for electrode and capacity detection
• Autoconfiguration of the charging current and charging time for each electrode input
• Separate trip and trip thresholds for each electrode, ensuring hysteresis and electrode independence
• Capacitance measurement from 10 pF to over 2000 pF
• Resolution 0.01 pF
• I2C interface
• I2C address: 0x5A
• Supply voltage: 3.3 V or 5 V

Kit contains

• Grove I2C Touch Sensor module
• 4 x touch fellers