This multitool just earned a permanent spot on my keychain - here's everything it can do

The K3 Ultramulti EDC keychain tool is multifunctional, combining a flashlight, laser pointer, and lighter into one convenient device.
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How to make a servo tester using ATtiny85 micro chip

Making a servo tester using an Attiny85 micro chip, Attiny45 also works for this project. This diy servo tester is as good as any other servo tester, the difference is that it can be programmed to do ...