Content for MPR121

MPR121

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.

How to make a Perfect Home Automation System

“For a Perfect Home Automation, I selected these points - Compact - IoT Enabled - Works without internet - Features - Easy to Install - Long Life For making a system like this I break this operation into 3 parts - Hardware Phase - Software Phase - Installation Phase …

Bluetooth RPM Letterboard

“A Rapid Prompting Method (RPM) letterboard with capacitive touch sensors & Bluetooth connectivity for enhanced functionality The Rapid Prompting Method (RPM) is a technique developed by Soma Mukhopadhyay as a vehicle for non-verbal autistic children (and adults) to communicate and pursue …

Make It So! Star Trek TNG Mini Engineering Computer

“This is a working display based on Star Trek TNG. Uses APIs and sensors for weather, VOCs, power measurement, calendar, fitness, and news. Overview I grew up watching Star Trek: The Next Generation. I’ve always wanted to build a …

Capacitive Touch Sensing Grid

“Build a 6x6 grid with an MPR121, expanding possible inputs from a mere 12 to 36! Capacitive Sensing A capacitor is simply two conductors with an insulator in between. This allows for a charge to be stored and then discharged …

Teensy 4 Large Music Synth

“Place several screws into their respective locations to build a song, then simply let the large wheel turn to trigger some notes! Story Music Boxes Music boxes have been around since their invention in the mid-nineteenth century. They work by …

Turn (Almost) Any Surface Into a Touch button with MPR121

“Capacitance capabilities at the tip of your finger! MPR121 is a 12-pin touch sensor, using capacitance capabilities of the IC. There are 2 libraries for this IC, I personally prefer Using the bare conductive one. https://github.com/BareConductive/mpr121 …

Easy DIY Arduino Touch Sensor Piano

“This mini piano requires no soldering and is very easy to make.It’s a great starter project to get into Arduinos. I had tons of fun making it and playing it once finished!This project can be completed by …

A PSoC-Based Digital Load Box

“If you’ve ever had to build a power supply, you may have needed to test it to a certain current limit. Too often, the way to do this is by stacking up large wattage resistors in series and parallel …

Android Things Capacitive Touch Piano

“Play music like a scientist using Android Things and a MPR121 capacitive touch sensor controller.”

Touch LED table - Retrogaming and ambiant light

“Arbalet is an ARduino-BAsed LED Table, a flat surface filled with several hundreds of coloured square lights designed for Education, Geeks, and Pleasure. With its limited number of pixels and a DIY touch interface, Arbalet brings our old 80’s …