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Ideally, you'd connect your computer directly to your ISP's modem with an Ethernet cable to run a speed test, but that's not always possible. Another option is to use your wireless router's app.

GizBot Internet Speed Test is the latest tool to measure mobile internet (2G, 2.5G, 3G, 3.5G, and 4G), Wi-Fi, and wired internet speed. GizBot's Internet speed test engine is powered by nperf's ...

Older cameras (and some newer ones) use mechanical shutters that creep out-of-spec over the years, so [Dean Segovis] built a handy shutter speed tester. With just a handful of basic components ...

Does the shutter still operate as it should? How long is a split second anyway? You need a shutter speed tester, and luckily for us, [Stuart Brown] has one. There are no sharks involved in this ...