An oscilloscope isn’t exactly the cheapest thing around as an entry-level version will cost you a few Benjamins at least, but this DIY version is perfect for the hard times we’re all going through at the moment – it fits snugly into your pocket, costing a mere $33 a pop. Known as the Digital Storage Oscilloscope, it might lack all the functions of a traditional model, but since it is open source, you can depend on your genius to get the most out of it. If you’re too lazy to come up with one yourself, there is always a pre-built version which is going for $49.
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