An inspection camera (or borescope) is invaluable for checking anything from engine cylinders and gun bores to plumbing and HVAC pipes. They come as self-contained devices, or as a gadget to use with ...
There is a lot to be learned from the experience of building something functional, and even better if doing so doesn’t break the bank. [Sergej Stoetzer]’s 20€ DIY-Eyetracker aims to be an educational ...
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