skip to Main Content
+971 55 881 1725 hmimthiaz @ imthi.com

Capacitive touch Drumkit with Raspberry Pi using MRP121

Couple of weeks ago I backed a new project Touch Board: Interactivity Everywhere on kickstater. This project excited me so much and I couldn’t wait for the finished product to arrive in March. I started to search for capacitive touch chips and finally landed on MPR121 breakout board on Sparkfun. Ordered them and received it 2 days ago and could not wait anymore and directly jumped into building a drums kit.

To make this work I did some research and everything was available but from different website. In this article I will put everything together in one place. I will go step by step

What do you need ?

1) Raspberry PI loaded with Raspbian OS.
2) MPR121 Capacitive Touch Sensor Breakout Board
3) Aluminium Foil for touch board
4) Connecting Wires

Configure I2C

I2C is a very commonly used standard designed to allow one chip to talk to another. So, since the Raspberry Pi can talk I2C we can connect it to a variety of I2C capable chips and modules. Please follow anyone of the following links to configure I2C on your Raspberry pi.

I2C and Raspbian wheezy
Adafruit’s Raspberry Pi Lesson 4. GPIO Setup

Connect the circuit

Can you detect the address of the MPR121 board ?

If you are not able to see 5a, try the command with i2cdetect -y 0. Still no luck! Google is your friend…

Download Code

Thanks to Scott Garner has contributed the complete source code of the beetbox. Download the code from github and run the program.

You should be able to hear the sound when you touch the foil inputs. If you are not able to hear the sound you can refer to this article to play sound file from command prompt in Raspberry Pi.

Thanks to Bare Conductive for inspiring this project… ­čśë

Bose QuietComfort® 15 Acoustic Noise Cancelling® headphones

Today I received a special gift from my wife for my birthday. Guess it was? QuietComfort® 15 Acoustic Noise Cancelling® headphones from Bose. Thank you so much and I am really enjoying every bit of it.

Highlights

  • The Bose┬« best headphones reduce noise across a wide range of frequencies
  • Enjoy music and movies with clear and lifelike sound
  • Comfortable, around-the-ear fit
  • Includes cable with remote for iPhone┬«/iPod┬« control, mic for hands-free iPhone calling
  • AAA battery: 35 hours average life
  • Ideal for frequent flyers

Full Spectrum Noise Reduction

They’re the best Bose headphones, period. QuietComfort 15 headphones feature exclusive Bose advancements in noise reduction technology. You hear less noise and more of your music and movies-with quality sound and a long-lasting comfortable fit. You won’t find this combination of benefits in any other headphone.

Bose technology at work

Within every pair of QC®15 headphones, advanced electronics use microphones inside and outside each earcup to sense the sounds around you-and reduce the noise. Proprietary ear cushion technology blocks some of the noise before it even reaches your ears. Together, these Bose innovations add up to a more enjoyable listening experience.

Relax with music – or without it

QC15 headphones also feature proprietary signal processing and TriPort┬« acoustic headphone structure for more lifelike sound-including deep low notes-from small, lightweight earcups. And when you’d rather relax without music, switch on QC headphones to simply reduce the noise around you, wherever you are.

Take calls. Take control

QC15 headphones come with a cable customized for select Apple® products. A three-button remote and microphone let you take calls on your iPhone and control music functions on other Apple devices. You can also purchase a mobile kit that lets your QC headphones work with other cell phones, too.

Welcome to a better-sounding world

When you fly with QC15 headphones, engine roar fades to a whisper. When you listen at home or at work, fewer distractions get in the way of your music. And when you want to stay connected, calls are just a button-press away. QC15 headphones continue to give you more of what you want to hear, and less of what you don’t.

QuietComfort 15 Acoustic Noise Cancelling Headphones Highlights

  • Significant noise reduction across a wider range of frequencies. Proprietary Bose innovations use microphones both inside and outside each earcup to sense and reduce the sounds around you.
  • TriPort acoustic headphone structure, another Bose exclusive, features tiny vents in the earcups to enable a tonally-balanced audio performance-including reproduction of deep, low notes-from relatively small and lightweight headphones.
  • Active equalization electronically tunes the headphones’ frequency response, enabling outstanding audio performance.
  • Interchangeable audio cables, one for general use, and one just for select Apple products, offer greater convenience than permanently connected Y-cables.
  • Inline microphone allows for hands-free iPhone conversation and access to certain voice applications, such as VoiceOver and Voice Control, in other Apple products.
  • Inline three-button remote switches between calls and music, and controls volume, track selection and voice applications on select Apple products.
  • Advanced ear cushions use new materials in a proprietary design to establish a critical acoustical seal-helping to further reduce noise while providing a comfortable fit.
  • Fold-flat earcups rotate 90 degrees for easy storage and portability in the included case.
  • Slim carrying case helps protect headphones and accessories during travel.

Apple cable compatibility

The QuietComfort 15 inline remote and microphone cable is compatible with iPod nano (4th, 5th and 6th generation), iPod classic (120GB, 160GB only), iPod touch (2nd, 3rd and 4th generation), iPhone 3GS, iPhone 4, iPad and iPad 2, and Macbook (unibody) and Macbook Pro. The remote is supported by iPod shuffle (3rd generation). Audio is supported by all iPod models. Requires latest iPod software.

Back To Top