LED Matrix Dual Hourglass

LED Matrix Dual Hourglass
Sand Hourglass Hourglass
Rolling

An hourglass sand simulator built with ATmega328 (Arduino), MPU-6050 accelerometer, and four 8x8 red/green LED matrix displays.

The enclosure and stand are 3D printed PLA plastic. A 3000mAh LiIon pouch battery and charger are built in.

Design Documents

Bill of MaterialsK505_BOM.pdf
Schematic DiagramK505_schematic.pdf
3D Print FilesSand Wheel 3D Print Files.zip
PCB GerbersK505A_gerbers.zip
Source CodeArduino.ino

Operation

Reset buttonRestart current mode.
Allows brightness and mode setting.
Mode buttonChanges color when running.
Selects mode when pressed immediately after reset.
Speed dialChanges animation speed when running.
Sets brightness if MODE is pressed at reset.

Build Pictures

Block diagram
block diagram

PCB Schematic diagram
schematic

Front
front

Back
back

Back interior
back inside

Front interior
front inside

 

Enclosure
front

Back Plate
back

Mounting Ring
ring

Battery Holder
battery

Base
base