Hands on with the super tiny arudino: FemtoDuino

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We originally heard about the FemtoDuino last year. It looked good enough and tiny enough, but we didn't really have a need for it. Recently though, we started on a new project (which you can follow on the forums!) which required an easy modification to an existing circuit. Space and weight were quite important so we decided to pick up a couple femtoduinos at $25 each, and give them a try. … [Read more...]

Cracking a SAM7XC cryptographic coprocessor

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[Adam Laurie] spent time tearing into the security of the SAM7XC chip produced by Atmel. Even if he hadn't found some glaring security holes just reading about his methodology is worth it. The chip is used in a secure RFID system. The chip is added to the mix to do the heavy lifting required when using encryption. [Adam] grabbed a couple of open source libraries to put it to the test. The … [Read more...]

Automatic volume control puts the kibosh on loud TV commercials

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If you're having a hard time tuning out those loud commercials why not let your electronics project do it for you? This is an Arduino-based setup which adjusts television volume when it goes above a certain threshold. It uses a microphone, rather than a direct audio signal, so you can set it based on what is actually heard in the room. The control scheme uses the IR LED and IR receiver seen on … [Read more...]

Script lets you import Eagle boards for use in FreeCAD

eagle-designs-imported-for-freecad

[Christian Aurich] wanted to use his Eagle CAD circuit board design in a proper CAD program in order to design enclosures. There are already a few options along these lines, but they didn't quite fit his needs so he developed a script to import Eagle boards into FreeCAD. The script is packaged as a python macro for FreeCAD. In describing the shortcomings of what's already out there [Christian] … [Read more...]

Digging deeper into the Apollo Saturn V LVDC

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[Fran] went all-out with her reverse engineering of the Apollo Saturn V LVDC board. Regular readers will remember that she was showing of the relic early this year when she took the board to her Dentist's office to X-ray the circuit design. Since then she's been hard at work trying to figure out how the thing functions using that look inside the board and components. When we say 'hard at work' we … [Read more...]

GLCD clock project packed with great UI and features

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This Graphic LCD clock doesn't have a fancy case, but [Gregory Wright] built in so many great features we think it will serve as inspiration for many projects to come. If he does decide to add a case it will be quite easy as there are no buttons to work around. Without buttons how can the thing be adjusted? He decided to go with an IR remote control for all settings. This gives him a lot more … [Read more...]

Harry Potter location clock spies on your smart phone

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The location clock found in the Harry Potter books makes for a really fun hack. Of course there's no magic involved, just a set of hardware to monitor your phone's GPS and a clock face to display it. [Alastair Barber] finished building the clock at the end of last year as a Christmas gift. The display seen above uses an old mantelpiece clock to give it a finished look. He replace the clock … [Read more...]