Repository files navigation

A pseudo-falling-sand toy using an ATtiny85.

• Some LEDs of the 16×16 LED matrix light like sands in a box. You can enjoy falling sands by tilting the device.
• The amount of sand can be changed by pressing one button.
• The arrangement pattern of the wall can be changed by pressing the other button.
• If it's powered on with holding both buttons down, the maintenance mode starts.
  • You can check current values of the axis accelerometer.
  • The calibration procedure will starts by holding both buttons down for a while. If it starts, place the device on a flat surface.

• AnATtiny85
• Two16×8 LED matrix modules with HT16K33
  • One module must be tuned to be assigned I²C address to 0x71 (default is 0x70)
• A3 axis accelerometer module with MMA7455
• A battery holder and battery(ies)
• Two tactile switches
• A slide switch
• Two 10kΩ resistors
• A 0.1μF electrolytic capacitor
• Wires, connectors, etc...

Install ATTinyCore boards to the Arduino IDE and configure the settings as follows.

• SimpleWire.h
  • Copyright (c) 2020 Sasapea's Lab. All right reserved.

These codes are licensed underMIT License.

• Raspberry Pi LED Matrix Sand Toy by Ruiz Brothers| Adafruit Learning System
• Falling-Sand-Matrix by witnessmenow | GitHub
• LED MATRIX SHIELD 13x15 by tuenhidiy | AUTODESK Instructables
• LED Matrixで砂シミュレーション機をつくろう by kotaproj | Zenn