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Addition of Prototyping Perfboard
08/10/2023 at 14:05 • 0 commentsAfter adding six buttons to the already existing four on the Pimoroni Display HAT Mini, I was left with just enough GPIO pins for an IR transceiver (LED and receiver driven by LIRC), the antenna pin for RPiTX, and one pin for PWM audio. I needed to connect to these pins while the display HAT was attached to the Pi, and while still maintaining some measure of modularity and serviceability.
Enter the UUGear 2x20 low-profile female GPIO header. It's only about 2mm in height which allows it to fit perfectly under the HAT header, with about half of a mm clearance for wires to pass over it. This allowed me to create a removable connector with wires soldered to a 20mmx80mm prototyping perfboard mounted to the Pi with a custom designed 3D printed bracket. The components for the IR blaster, antenna connector, and speaker will be mounted to the perfboard. The plan is to use the Adafruit STEMMA speaker for audio output.
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Third Display
07/30/2023 at 07:19 • 0 commentsDesigned and printed new bracket and added third 128x32 OLED with 9-DOF and GPS sensor readings:
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Location, Motion, and Orientation
07/25/2023 at 12:20 • 0 commentsAdded a PA1010D GPS module and a BNO085 9-DOF sensor on right side. Had to rewire all the I2C devices to allow the wires to get where they needed to go. Also 3D printed a redesigned mounting bracket around the primary display with additional mounting points on the right side, and a 1mm increase in height to allow the secondary display to flip down parallel with the primary display.
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Biometrics
07/19/2023 at 13:26 • 0 comments- Added Qwiic / Stemma QT 5 Port Hub
- Added MAX30102 pulse and blood oxygenation sensor on 3D printed hinge
- Redesigned and replaced bracket for MAX17048
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Redesign and Upgrades
06/27/2023 at 14:44 • 0 comments- Redesigned and reprinted all 3D printed parts
- Swapped DreamGear MiniKey for BBQ20KBD.
- Swapped 128x32 OLED for 128x64 OLED
- Swapped 2-port USB hub board, for 4-port USB hub breakout
- Added additional tac buttons to Display HAT Mini for a total of 10 GPIO buttons.
- Added MAX17048 battery gauge
- Added AMG8833 thermal imaging module
- Added sliding rails mechanism under keyboard
- Relocated camera to back of unit next to thermal imager
- Battery terminals are now attached with magnets for easy swapping of batteries
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Display Swap
09/25/2022 at 01:37 • 0 comments2022-09-24
Completed swapping out of Adafruit Mini PiTFT 1.3" display and custom 7-button GPIO HAT for a larger Pimoroni Display HAT Mini. The Pimoroni Display has also been modified by adding five tac buttons in addition to the four that came with it, for a total of nine buttons mapped to GPIO, to compensate for keys that aren't on the DreamGear MiniKey keyboard.