Dear All About Circuits community,
I would like to show you my open source electronic toy design based on Arduino - BitCake. That's electronic cake with candles you can blow out.
I use ATTiny44 MCU programmed as Arduino. There's piezo sensor and air trap to detect blowing using resonance effect. The program constantly takes signal samples and makes partial Fourier transform to read amplitude around 750 Hz frequency. The device has astounding sensitivity and selectivity!
I would like to show you my open source electronic toy design based on Arduino - BitCake. That's electronic cake with candles you can blow out.
I use ATTiny44 MCU programmed as Arduino. There's piezo sensor and air trap to detect blowing using resonance effect. The program constantly takes signal samples and makes partial Fourier transform to read amplitude around 750 Hz frequency. The device has astounding sensitivity and selectivity!
When blowing is detected, LEDs are blinked with randomly generated period, phase and time-to-live. The phase hops ±180 degrees depending on the blowing amplitude so candles behave very lively.
Official webpage of the project is http://bitcake.eu
Maksym
Official webpage of the project is http://bitcake.eu
Maksym