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KNACRO MPR121 12 Way Capacitive Touch keyboard keypad Touch Switch Panel for arduino RED
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*Packaging of actual item may differ from photo shown
- Electrical items MAY be 110 volts.
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About KNACRO MPR121 12 Way Capacitive Touch Keyboard
The module MPR121 touch control chip, which can have up to 12 touch points, eight of which also touch points can be set for the LED driver. The chip uses 1.71 V to 3.6 V power supply, when the sampling period of 16ms of current is only 29uA when external trigger input, the chip to interrupt and I2C way to notify the external device. Very versatile, it can be used as computer peripherals, MP3 player, remote control, lighting control, and mobile phones. When MPR121 induction to change IRQ interrupt pin will be pulled low. Chip: MPR121. Chip Type: touch control. Touch points: 12. Power: 1.71V ~ 3.6V. Size：90*53*11mm（L*W*H). Weight:22g. Module pin connections: MPR121 device is IIC, 2-wire serial connection. For 3.3V ~ 3.3V logic level; For 5V ~ 5V logic level; Choose one of the lines according to the MCU IIC support level. Just five lines: SCL, VCC, IRQ, GND. As with the Arduino connected: MPR121 keypad -> Arduino Uno; 5V-> 5V; SCL-> A5; SDA-> A4; GND-> GND; IRQ-> D2.
