Hardware System
The design for the Marple Tilt board was based off the following YouTube video which demonstrated the basic principles of the board design: https://www.youtube.com/watch?v=EN-1pWblSAw (thanks to the YouTube channel Simple Method). However, the video failed of offer any dimensions for the design which meant the board had to be designed from scratch with the original principles in mind. The tilting mechanism operates by having the screen platform connected to an inner wall that allows the board to tilt across an X-axis. This inner wall is then perpendicularly connected to an outer wall that allows it to rotate around a Y-axis. By then connecting 2 perpendicular rotating rods to the underside of the board with string, when the rods are rotated, the platform then tilts across the corresponding X or Y-axis as partially demonstrated below: (It should be noted that cross-hatching denotes negative space.)
Designs with dimensions were then created for each component of the board such as the outer walls:
Boards of plywood were then cut down to the correct specification for each part and assembled, before the string was wrapped around each control rod and glued to the underside of the board for stability, resulting in the final product which successfully met the project specification:
- In order to wire the MPU6050 please follow wiring guide for a typical I2c device, and connect the INT pin to
pin 13of the Pi. - In order to wire the matrix, please follow the guide on https://github.com/hzeller/rpi-rgb-led-matrix/blob/master/wiring.md
Assemble the above construction and affix the MPU in the correct orientation to the bottom of the matrix (The markings of axes are shown on the device).