Building a capacitance meter is a great exercise. If you’re feeling quite safe in your digital-circuit-only life, this will push just far enough out of the comfort zone for you to see there’s ...

There are a bunch of ways to go about it, and this capacitive rainmeter solution from [Magnus Thome] might just be the perfect solution you’re looking for. Like many who came before ...

But it's not just about the power density, which is impressive enough at 2,900 mW per cubic meter. It's also about storage.