HyperPixel 4 & Raspberry Pi 3 B+ Handheld

2019-03-02 Update:

• Added LCDBezel-TouchVersion.stl: Bezel which works with the HyperPixel 4 Touch version.
• Added Support1_v2.stl: Adds additional clearance around the border of the HyperPixel4 PCB.

This is a case used in a proof of concept build for the Teensy Thumb Keyboard PCB. More info at:

• https://hackaday.io/project/162281-teensy-thumb-keyboard
• https://github.com/AnthonyDiGirolamo/teensy-thumb-keyboard

I wanted a small tactile keyboard with a comfortable layout that could be used in any handheld based project. BASIC game console, graphing calculator, PDA, Raspberry Pi PocketCHIP replacement, etc.

The main use case is a PocketCHIP replacement device using a Raspberry Pi 3 B+. I'd like it to feel better than my PocketCHIP "Mechanical" Keyboard design.

There are a couple things that I plan on fixing before recommending anyone print this:

1. Add a slide switch cutout to the back of the case.
2. Create an LCD bezel compatible - DONE! 2019-03-02

Additional Parts:

Teensy 3.2 OR Teensy LC

• https://www.pjrc.com/store/teensy32.html
• https://www.adafruit.com/product/2756
  $19.80
• https://www.pjrc.com/teensy/teensyLC.html
  $11.65

HyperPixel 4.0

• https://shop.pimoroni.com/products/hyperpixel-4?variant=12569485443155
• https://www.adafruit.com/product/3578
  $49.95

PowerBoost 1000 Charger - Rechargeable 5V Lipo USB Boost @ 1A - 1000C

• https://shop.pimoroni.com/products/powerboost-1000-charger-rechargeable-5v-lipo-usb-boost-1a-1000c
• https://www.adafruit.com/product/2465
  $19.95

Lithium Ion Polymer Battery - 3.7v 2500mAh

• https://www.adafruit.com/product/328
  $14.95

Slide Switch

• https://shop.pimoroni.com/products/spdt-mini-power-switch
• https://www.adafruit.com/product/805
  $0.95

Panasonic EVQ-PAC04M Tacticle Switches

• https://www.mouser.com/ProductDetail/667-EVQ-PAC04M
• https://www.digikey.com/products/en?keywords=EVQ-PAC04M
  60x $0.0177 (order extras)

1N4148 Zener Diodes

• https://www.amazon.com/gp/product/B06XB1R2NK
  10x $0.02

Raspberry Pi 3 - Model B+ - 1.4GHz Cortex-A53 with 1GB RAM

• https://www.adafruit.com/product/3775
• https://shop.pimoroni.com/products/raspberry-pi-3-b-plus
  $35

SD Card

• https://www.amazon.com/Samsung-MicroSD-Adapter-MB-ME32GA-AM/dp/B06XWN9Q99
  $6.99

Steel Thread Rolling Screw for Plastic, Zinc Plated, Pan Head, Phillips Drive, #2-28 Thread Size, 5/16" Length (Pack of 100)

• https://www.amazon.com/gp/product/B00GDXU4WM/

M2.5 Machine Screws 6mm to 8mm long and matching hex nuts

• https://www.amazon.com/Hilitchi-400pcs-Phillips-Washers-Assortment/dp/B06Y3TVKMR/