The humble piezo element is often used as little more than a buzzer in many projects. However, you can do more with them, as [Something Physical] demonstrates with their nifty piezo noise box. Check ...

So you've just bought one of the best soundbars to upgrade your TV speakers. It's out of the box, you've set it up, plugged it in, turned it on... and it's off. Something doesn't sound right. You ...