MIT-CRE[AT]E-team-HAPlas

Code and CAD models repository for our MIT CRE[AT]E challenge device, a haptic and auditory feedback device.

BOM:

Electronics:

• Seeed Studio XIAO nRF52840 Sense
• DFPlayer mini MP3 player
• 1W 40mm 2 pin speaker
• UltraFire 10440 Li-ion battery
• Sacrificial USB-C Cable (it will be cut to hijack the power pins, so use one you do not need anymore)

Hardware:

• 4x M3x8mm Countersunk hex head screws
• 1.5mm thick, 15mm wide double-sided foam tape
• 26AWG wire (for the electronics)
• 250~ grams of PLA (PLA+ recommended, color is up to preference) We used Bambulabs PLA MATTE
• 12mm Brass rod (other types of dense metal can be used depending on preference and availiability)

Tools:

• Soldering Iron
• 3d Printer
• Screwdriver
• Lathe

Printed Parts and settings

STL's found here

Main Body STL

QTY: 1

Suggested Print Settings:

• 0.16mm Layer Height
• 3 Walls
• 6 Top & Bottom layers
• 20% Infill
• Cubic infill pattern
• Supports on (tree supports suggested)

Orientation in slicer (Orca slicer shown)

Sliced with Supports (Orca slicer shown)

Electronics Bay Cap STL

QTY: 1

Suggested Print Settings:

• 0.2mm Layer Height
• 3 Walls
• 100% Infill
• Supports off

Orientation in slicer (Orca slicer shown)

Sliced No Supports

Cap STL

QTY: 2

Suggested Print Settings:

• 0.16mm Layer Height
• 3 Walls
• 4 Top & Bottom layers
• 40% infill
• Cubic infill pattern
• Supports off

Orientation in slicer (Orca slicer shown)

Sliced No Supports (Orca slicer shown)

Battery Holder STL

QTY: 1

Suggested Print Settings:

• 0.16mm Layer Height
• 3 Walls
• 100% Infill
• Supports on (tree supports suggested)

Orientation in slicer (Orca slicer shown)

Sliced with Supports (Orca slicer shown)

Code upload instructions

Install the Arduino IDE

• Download link

Install the Seeed Studio board library

• After opening the Arduino IDE click on File > Preference, and fill in Additional Boards Manager URLs with the URL below: https://files.seeedstudio.com/arduino/package_seeeduino_boards_index.json

Select which program variant you want to use

• click here for code options

Select the board in Arduino programmer and hit upload