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5 Pack MPR121 Breakout V12 Capacitive Touch Sensor Controller Module I2C Keyboard Development Board for Arduino

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$9.95

$ 4 .99 $4.99

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About this item

  • 【Sensor Controller】 The MPR121 is the second generation sensor controller following the initial release of the MPR03x series of devices. The MPR121 features an increased internal intelligence plus Freescale’s second generation capacitance detection engine. Some major enhancements include an increased electrode count, a hardware configurable I2C address, an expanded filtering system with debounce, and completely independent electrodes with built-in autoconfiguration.
  • The device also features a 13th simulated electrode which represents the simultaneous charging of all the electrodes connected together. When used with a touch panel or touch screen array, the 13th simulated electrode allows a greater near proximity detection distance and an increased sensing area.
  • 【Features】 1.71V to 3.6V operation; 29 μA typical run current at 16 ms sampling interval; 3 μA in scan stop mode current; 12 electrodes/capacitance sensing inputs in which 8 are multifunctional for LED driving and GPIO; Integrated independent autocalibration for each electrode input; Autoconfiguration of charge current and charge time for each electrode input; Separate touch and release trip thresholds for each electrode, providing hysteresis and electrode independence;
  • 【Implementations】 General Purpose Capacitance Detection; Switch Replacements; Touch Pads, Touch Wheel, Touch Slide Bar, Touch Screen Panel; Capacitance Near Proximity Detection;
  • 【Typical Applications】 PC Peripherals;MP3 Players;Remote Controls;Mobile Phones;Lighting Controls; I2C interface, with IRQ Interrupt output to advise electrode status changes; 3 mm x 3 mm x 0.65 mm 20 lead QFN package; -40°C to +85°C operating temperature range;


1.Advanced Capacitance Detection Technology:
Discover enhanced touch sensitivity with the MPR121 sensor controller, featuring next-generation capacitance detection.
With 12 independent electrodes and a 13th simulated electrode, enjoy greater proximity detection and a wider sensing area,
ideal for touch panels and screens.
This device supports versatile applications, from switch replacements to touch interfaces.
2.Low Power Consumption and Efficient Performance:
Operate efficiently with the MPR121's low power consumption,
using only 29 μA in typical run mode and 3 μA in scan stop mode.
Whether for mobile devices or remote controls,
this sensor ensures minimal energy use while maintaining high performance,
making it suitable for battery-powered applications.
3.Flexible and Versatile Design:
The MPR121 supports 1.71V to 3.6V operation and includes 8 multifunctional electrodes for LED driving and GPIO,
offering flexibility across various projects.
Its compact 3 mm x 3 mm x 0.65 mm QFN package is designed to fit seamlessly into your designs,
supporting a wide operating temperature range from -40°C to +85°C.
4.User-Friendly Configuration and Calibration:
Simplify your setup with integrated autocalibration and autoconfiguration features.
Each electrode input is independently calibrated and configured,
ensuring consistent touch and release sensitivity.
The I2C interface with IRQ interrupt output provides real-time updates on electrode status,
streamlining the integration process.
5.Wide Range of Applications:
Expand your product's functionality with the MPR121, suitable for PC peripherals, MP3 players, lighting controls, and more.
Its advanced capacitance detection capabilities make it ideal for developing touch pads, wheels,
slide bars, and near proximity detection systems, enhancing the user experience in various electronic devices.


liam09
Reviewed in the United States on January 19, 2025
These are pretty basic and straight forward pressure sensors to setup and use. All of the ones that came in the package (4) worked on my test bench. I am looking forward to hooking these up to my project!
Scrimshaw
Reviewed in the United States on January 14, 2025
These MPR121 boards are fairly standard, often cloned boards that are very easy to get up and running. You can find lots of tutorials online using these boards for all sorts of touch sensitive projects. These Jessinie boards are good quality, and arrive in ESD packaging. I spot tested one board (with an Arduino Uno) using code from an online tutorial, and it worked fine. Just take note, you need to power it from the 3.3V supply from the Arduino, not 5V, and you will also need to solder on the header pins. These are a good value. 5 stars.