Introduction: Drum Pads With Arduino

By
About: Electrical engineering and computer science specialist

Hello,

In this tutorial I'm going to show you how to build a simple drum pads using Arduino.

I used tones to replicate In the end by Linkin Park.

Step 1: Required Components

  1. Arduino Uno (Nano, Mega etc)
  2. SD Card (Size depends on your tones, mine are less than 50 KBytes each)
  3. SD Card module
  4. TTP229 capacitive touch keypad
  5. Speaker (Headphones or 3.5 mm female jack would work aswell)
  6. Breadboard & Jumpers

Step 2: Required Software & Libraries

Arduino IDE

TTP 229 capacitive touch keypad library

TMRpcm audio library

Step 3: Preparing the Audio Tones

Now, the audio tones must be in a specific format in order to be playable with Arduino.

The main format must be .WAV with:

  • Bit resolution 8
  • Sample rate 16000
  • Audio channel Mono
  • PCM format unsigned 8 bit

for converting my tones I used Online Convert

Step 4: Schematic

Now connect everything as follows:

SD card:

  • MOSI - Pin 11
  • MISO - Pin 12
  • CLK - Pin 13
  • CS - Pin 4
  • VCC - 3.3V
  • GND - GND

TTP 229

  • VCC - 3.3V
  • GND - GND
  • SCL - Pin 2
  • SDA - Pin 3

Speaker (headphones etc)

  • Wire 1 - Pin 9
  • Wire 2 - GND

Step 5: Running the Code

Step 6: That's It.

Now upload your tones to the SD card, power up your Arduino and start playing..

NOTE: The output audio quality is pretty bad if you use it directly from Arduino, It is possible to create a amplifier/filter circuit to raise the quality.

Attachments