참고 page : http://www.hardcopyworld.com/ngine/aduino/index.php/archives/825
http://www.coldtears-electronics.com/images/XS3868.pdf
유용한 site
http://www.hardcopyworld.com/ - Arduino 등 다양한 정보
3D design
https://www.tinkercad.com/
Module
http://ko.aliexpress.com/item/5-pcs-BL3256-Bluetooth-stereo-audio-module-Bluetooth-speaker-module-Bluetooth-audio-calls-Wireless-Audio-module/32392654332.html
소형 아두이노 :
