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Bare Conductive Touch Board

Bare Conductive Touch Board

  • 10000

The Touch Board from Bare Conductive is an easy-to-use Arduino@Heart board that gives you the ability to turn almost any material or surface into a sensor. Each Touch Board offers 12 electrodes for your a conductive ink or other type of connector that can be drawn or attached to create light switches, musical instruments, or custom interactive surfaces all through the Arduino IDE. The Bare Conductive Touch Board is even equipped with an onboard MP3 player making each board capable of turning your favorite song into a MIDI tune. Simply put: if you can do something with an Arduino or Arduino-compatible device, you can do it (and more) with the Touch Board and some conductive ink as well!

The Touch Board has been specifically designed to be a microcontroller board with dedicated capacitive touch and MP3 decoder ICs. Each board has a 3.5mm audio jack and micro SD card holder (for file storage), as well as its own 128MB micro SD card. The Touch Board has been based around the ATmega32U4 and runs at 16MHz from 3-5.5VDC. It has everything you would expect to be on an Arduino-type device including, a micro USB connector, a JST connector for an external lithium polymer (LiPo) cell, a power switch and a reset button. It should be known that there is limit of 32GB to the microSD card sized used with this board.

The Bare Conductive Touch Board is similar to the Arduino Leonardo and can be programmed using the Arduino IDE (1.5.6 or later). To power the Touch board simply attach it to a micro USB connection or from a 3.7V lithium polymer (LiPo) cell connected to the 2-way JST PH series connector. The onboard ATmega32U4 can appear to a connected computer as a mouse or a keyboard, serial port, or USB MIDI device.

Note: The Touch Board does NOT include a micro USB cable or LiPo battery. These items will need to be purchased separately and can be found in the Recommended Products section below.


  • 1x Touch Board
  • 1x microSD Card (128MB)


  • Arduino compatible (recognized as an Arduino Leonardo in IDE)
  • Atmel ATMega32U4 Microprocessor
  • Freescale MPR121 dedicated touch interface
  • VLSI VS1053B audio processor
  • Arduino Shield Compatible (check pins available)
  • 32 KB of Flash Memory of which 4 KB is used for bootloader
  • 5V operating voltage (automatic voltage selector for USB or battery operation)
  • Built in LiPo battery charging with onboard boost circuit for 5V operation
  • 16 MHz clock speed
  • Can be powered and programmed over USB
  • 20 digital I/O pins (3 used for Touch IC and 5 for MP3 IC – can be disabled)
  • 7 PWM channels
  • 12 analog input channels
  • 12 Touch electrodes of which 8 can be configured as extra digital inputs or outputs with PWM capability
  • 84mm x 62mm foot print with maximum height of 10mm (audio connector)
  • Up to 32GB via micro SD card
  • HID Capable


Brand: Sparkfun
Brand Part Number: DEV-13298
Our Part Number: h6004


Polymer Lithium Ion Battery - 2000mAh
Polymer Lithium Ion Battery - 1000mAh
Polymer Lithium Ion Battery - 850mAh
USB Micro-B Cable - 6'
Bare Conductive - Electric Paint (50ml)
SparkFun Touch Potentiometer
SparkFun Cerberus USB Cable - 6ft