An hourglass built with Trinket M0 (SAMD21 processor) and eight 8x8 red/green LED matrix displays.
In this hourglass a SAMD21 processor was used for speed. It turns out the speed is limited by the I2C bus to the displays; the SAMD21 can go much faster than the display can be updated.
Design Documents
Block Diagram | big_hourglass_block.jpg |
Schematic Diagram | K601_schematic.pdf |
PCB Gerbers | Gerbers_K601.zip |
3D Print Files | Big Hourglass Mechanical.zip |
Source Code | Arduino.ino |
Build Pictures