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[Andrew Gibiansky] has just started a tutorial series called Computing with Transistors. It's purpose is to pull back the many veiled layers between high level languages and the controlling of electrons. And fittingly this first post starts off by explaining voltage source, load, and current. Don't be thrown by its simplicity though. [Andrew] quickly moves on to talk about switching transistors … [Read more...]
[Mahmut] calls this project SmartBox. It's a BeagleBone controlled LED marquee which can pull down information off of the Internet. The project started with the display itself. [Mahmut] used six 5x7 LED modules to populate a circuit board he produced himself. The low side of the modules is controlled by some MBI5026 constant current drivers, with PNP transistors on the high side. The display … [Read more...]
Google TV is a network connected television. It does what you would think: plays television programs, streams media from the internet, and allows you to open URLs on your TV. But one nice feature is that it can also be controlled over the network rather than just via an IR remote. Google publishes apps which make this simple with a smartphone. But the communications protocols are open source, so … [Read more...]
[Michael Clemens] was looking for gifts for his Grandmother's 90th Birthday. She is visually impaired and loves to be able to listen to audiobooks. The problem is that she doesn't really get the hang of using electronics. He made things easy by building her a one-button audiobook player. The Raspberry Pi board is a perfect solution for this project. It's cheap, it has an audio port, it has … [Read more...]
[Gregory Charvat] decided to see what he could do with this old Police radar gun. It is an X-band device that broadcasts continuous waves and measures the Doppler shift as they echo back. He cracked it open to see if he could interface the output with a computer. After a little poking around he's able to get it connected to a 12V feed from his bench supply, and to monitor the output with an … [Read more...]
So IT has your computer locked down, but if you're lucky enough to have this model of telephone you can still play video games while at work. [AUTUIN] was at the thrift store and for just $8 he picked up an ACN videophone on which he's now playing video games. We don't know what magical second-hand stores sell functioning electronics of this caliber but you should never pass up an opportunity … [Read more...]
we don't have one... yet. We're getting inundated with campaigns on crowdfunding sites like kickstarter and indiegogo. Sometimes they're really cool projects, sometimes they're not. Unfortunately, they are all basically appeals for coverage on hackaday so they can get money. That immediately puts a negative taste in our mouths. Then again, if a hacker legitimately makes something really … [Read more...]
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