Look, I don’t know about you, but waveforms are the hottest thing on the planet right now. Everyone is rushing to Target and Walmart in an effort to get as many waveforms off the shelf as humanly possible. And while you’re at it, you might as well build one of these DIY oscilloscopes. They won’t rape your wallet and look how cute it is! Slope! Mode! Level! All you need is $33 and a soldering iron.