https://github.com/obono/attiny85swingpov

A POV (persistence of vision) display by human-powered swinging with ATtiny85
https://github.com/obono/attiny85swingpov

Last synced: 13 days ago
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A POV (persistence of vision) display by human-powered swinging with ATtiny85

• Host: GitHub
• URL: https://github.com/obono/attiny85swingpov
• Owner: obono
• License: mit
• Created: 2024-04-27T10:15:00.000Z (8 months ago)
• Default Branch: main
• Last Pushed: 2024-04-27T10:24:12.000Z (8 months ago)
• Last Synced: 2024-04-27T11:36:11.098Z (8 months ago)
• Language: C++
• Size: 6.13 MB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# ATtiny85SwingPOV

![Movie](doc/movie.gif)

This is a POV (persistence of vision) display by human-powered swinging.

[![Click to expand](doc/picture1_thumbnail.jpg)](doc/picture1.jpg)

3 demonstrations are available and it's changed by pressing the button.

* Message mode: display the letters "ATtiny85SwingPOV" with scrolling.

* Counter mode: display the number of how many time it's swinged.

* Graphic mode: various colored OBONOs move up repeatedly.

## Hardware

### Components

* [ATtiny85](https://akizukidenshi.com/catalog/g/g109573/)

* Optical tilt sensor: [RBS32](https://akizukidenshi.com/catalog/g/g102742/)

* NeoPixel Stick (WS2812 × 8)

* Resistors: 220Ω and 15kΩ

* Wires, connectors, a button, a switch, etc...

### Schematic

![Schematic](doc/schematic.png)

### Example

[![Click to expand](doc/picture2_thumbnail.jpg)](doc/picture2.jpg)

[![Click to expand](doc/picture3_thumbnail.jpg)](doc/picture3.jpg)

[![Click to expand](doc/picture4_thumbnail.jpg)](doc/picture4.jpg)

## Software

### Build environment

[Install ATTinyCore boards to the Arduino IDE](https://github.com/SpenceKonde/ATTinyCore/blob/v2.0.0-devThis-is-the-head-submit-PRs-against-this/Installation.md) and configure the settings as follows.

Attribute         |Value

------------------|------------------------------

Board             |ATtiny25/45/85 (No bootloader)

Chip              |ATtiny85

Clock Source      |8 MHz (Internal)

Timer 1 Clock     |CPU (CPU frequency)

LTO (1.6.11+ only)|Enabled

millis()/micros() |Enabled

Save EEPROM       |EEPROM not retained

B.O.D. Level      |B.O.D. Disabled (saves power)

This sketch depends on following library. (You can add this by library manager)

* [Adafruit NeoPixel](https://github.com/adafruit/Adafruit_NeoPixel)

Also, you should modify ["SwingPov.cpp"](SwingPov.cpp) depending on your hardware.

* `SWING_TIME_MIN` and `SWING_TIME_MAX`: The threshold of each swing time in msec.

* `SWING_PHASE_ADJUST`: The delay to toggle the direction after sensing tilt change by the percentage of each swing time.

### License

These codes are licensed under [MIT License](LICENSE).