Category Archives: ATTiny 85

A Buck-Boost Converter from the Ground Up

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DC to DC conversion has come a long way. What was once took an electromechanical vibrator and transformer has been reduced to a PC board the size of a largish postage stamp that can be had for a couple of bucks on eBay. So why roll your own buck-boost converter for the ground up? Maybe because sometimes the best way to learn is by doing.

When it comes to clear and succinct explanations, [GreatScott!] has you covered. We recently reported on one of the videos from his Electronic Basics series, but the video below covers the slightly more advanced topic …read more

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Raspberry Pi Plays All That Jazz

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[James Bellafaire] wanted a good looking old radio with a modern sound. Granted, you could hollow the case out and replace it with an iPod. Or you could convert the thing to an Internet radio. But where’s the fun in that?

[James] took a different approach. Part woodworking project, part Raspberry Pi project, and part microcontroller project, he wound up with a hard drive-based music player in a 1930’s case with knobs that control the playback.

Since the Pi isn’t great at reading potentiometers, [James] took at ATTiny85 and used it for that purpose. Coupled with a few hundred old …read more

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Hackaday Prize Entry: Shakelet

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A person who is deaf can’t hear sound, but that doesn’t mean they can’t feel vibrations. For his Hackaday Prize entry, [Alex Hunt] is developing the Shakelet, a vibrating wristband for that notifies hearing impaired people about telephones, doorbells, and other sound alerts.

To tackle the difficulty of discriminating between the different sounds from different sources, [Alex’s] wants to attach little sound sensors directly to the sound emitting devices. The sensors wirelessly communicate with the wristband. If the wristband receives a trigger signal from one of the sensors, it alerts the wearer by vibrating. It also shows which device triggered …read more

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