Use the o-TOOL to locate an invisible beam or align a laser or optic with ease. Add attachments to display polarization or beam profile, center or attenuate a beam, or determine beam size. The o-TOOL, ...

When working on electrical projects around the home—whether that’s troubleshooting an issue with your HVAC system, repairing an appliance, or testing a car battery—a multimeter is essential. These ...

This is the type of crowd that’s famous for building their own test equipment. If you need a way to program a flash chip, don’t go out and buy one — you can just build one. Need a spectrum analyzer?