In this review we take a closer look at the MPR121 Proximity Capacitive Touch Sensor Controller - Development Board.
This breakout board is powered by Freescale's MPR121QR2 and offers up to twelve individual electrodes and a simulated thirteenth electrode. Its functionality is driven by an I2C connection, and it boasts four jumpers on its bottom surface.

What makes the MPR121 standout is its capacity to control up to twelve individual electrodes. This feature allows for a diverse range of applications from creating customized keyboards to designing innovative touch-sensitive devices. The chip's I2C connectivity ensures reliable performance, while the four jumpers on the bottom of the board make for easy customization. In practice, the MPR121 delivers excellent sensitivity and accuracy, making it an excellent choice for projects that require precise touch control.

It's worth noting that the MPR121 has no regulation on the board so the voltage supplied should be between 2.5 to 3.6VDC. This minor inconvenience aside, this touch sensor controller is an excellent choice for a range of touch-sensitive projects. The breakout board is well-built, and the finish is of a high standard. However, there are a few potential downsides such as the need for careful soldering to ensure optimal performance.

Without a doubt the MPR121 Proximity Capacitive Touch Sensor Controller - Development Board is a top performer in its category. Its versatility, reliability, and ease of use make it an excellent choice for any project that requires precision touch control. If you're looking for a high-quality touch sensor controller, the MPR121 is an excellent choice.