Build a portable Bluetooth speaker with light effects
Wireless Bluetooth speakers and sound systems have quickly become very popular devices. Although very practical, the sound quality may not always be as good as you would like it to be. So, then, why don’t you build your own? The electronics needed for it are available as cheap modules from China, the acoustics are up to you. And while you’re at it, why not add lighting effects too? Here is a great tutorial.