This software implements logic for a Clap Switch. Two claps turns it on. Two claps turns it off again. Features include:

• controllable light hue and brightness
• a mechanical push button for when clapping is inappropriate

Please note that this is not an officially supported Google product. Though I am employed by Google, this is a personal project.

Speaking of which, I'm not a professional hardware engineer, just a very enthusiastic hacker. Let me know if you find bugs, I'll try to fix them.

This project is documented on hackaday.io at https://hackaday.io/project/165448-happy-clap-switch.

The implementation consists of three files:

• .atmelstart/atmel_start_config.atstart The Atmel START configuration file, used to generate hardware intitialization, libraries and boilerplate code. Edit this file using the online editor at start.atmel.com.
• main.c The actual code that does things.
• driver_isr.c An empty file that replaces the default driver_isr.c file generated by Atmel START.

This should be compatible with any IDE/environment that uses Atmel START but has only been tested with Atmel Studio.

To use this repository with Atmel Studio:

1. Clone this repository to a temporary location. This is important because Atmel Studio wants to create its own directories.
2. Upload the atmel_start_config.atstart file to start.atmel.com and generate and Atmel Studio configuration.
3. Open Atmel Studio and import the configuration. You will now have a project full of boilerplate code.
4. Copy the temporary repository directory into the Atmel Studio project directory. This will overwrite main.c and driver_isr.c. Make sure to copy the .git directory and .gitignore files too.

This was written to run on an Atmel ATtiny3217 processor. It takes input from a microphone, a push button and two rotary encoders. Output is to a short string of WS2812s LEDs.