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The Sound Blanket

Its key aspects are:-

  • Sounds specific to the user are recorded
  • Light but strong box
  • Runs on batteries
  • No programming skills needed
  • 8 Push Buttons with 8 Sounds

Sound Blanketr

Narrative

The purpose was to provide a set of sounds which the recipient would find "calming". This required a recording session using a Zoom H4n portable sound recorder. These files were then copied onto an SD card to be loaded on to the "Bare conductive" board. This board was used because of it's multi-functional capability thereby saving space in the container box. Reducing component count keeps the weight down and improves reliability. The push button were either "Arcade" buttons or industrial grade to provide reliability. The whole device then being powered by (originally) a set of 4 * 1.5 batteries.

The device lasted about 9 months until it eventually got damaged. The unit was refurbished. The 4 cell battery case replaced by a 9v arrangement to further reduced weight and prevent damage if dropped. It has since (Nov 2016)been returned back to it's user.

Sound Blanket ~ Front
Sound Blanket ~ Inside
Components Description / Hardware Functional Areas
Bare Conductive Board

Bare Conductive

  • This is a multifunction board that combines.
  • Sound file playing (MP3 or MIDI)
  • Capacitive Sensors
  • On board processor (Leonardo eqv of an Arduino).
  • Can be power by LIPO battery or external regulated 5v supply.
3w Stereo Amp

Amplifier

PAM8403 Two-Channel Amplifier Module Mini Digital Amplifier Board

This is a "Class D" stereo amplifier that will happily run on 5v, so needs a regulator to drop the e9v battery down to 5v.

5 volt regulator

Voltage Regulator.

As the eBoard is powered by a single 9v battery, an onboard 5v regulator was required to provide the 5 volts for the "Bare Conductive Board". This regulator can source up to 2.5 Amps so it is useful if a 5 volt amp is used.

Other components

  • 9 volt battery case.
  • On off switch (Take care not to se one with a built in light ~ they can cause excess current drain.
  • LED (to show the board is switched on.
  • 2k resistor for current limitater the LED.
  • Chopping board for push buttons panel
  • 3 Arcade buttons, 5 "industrial" quality small buttons.
  • Wooden off cuts.

 

 

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