600福利合集

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posted Aug 4th 2011 4:02am by
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automatic_mechanical_ac_control

600福利合集for anyone that works in a large office building, odds are you know the pains of dealing with a poorly regulated hvac system. [robovergne] and his co-workers recently moved to a new location, and found that the air conditioning control was less than effective, leaving the office

600福利合集while they manually triggered the a/c on and off every half hour for a while, that grew tiring, so [robovergne] decided to take things into his own hands. he had never used an arduino before, and figured that regulating the air would be a great first project. he mounted a small hobby servo onto the front of the a/c remote, and wired a ds18b21 temperature probe to the arduino. a small pot is used to adjust the temperature setpoints, which are displayed on the attached lcd screen. now, when the temperature starts to rise, the arduino triggers the servo to turn the air conditioning on without human interaction.

[robovergne] says that while his solution is ugly, it works quite well. it definitely gets the job done, we can’t argue with that!

600福利合集continue reading to see a video of his automatic a/c controller in action.

posted Jul 17th 2008 5:45am by
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[sprite_tm]‘s back with one of his excellent Atmel projects. he decided to turn an original XBox controller (cause he likes ‘em) into a standard USB HID device. He gutted the custom USB chip that Microsoft installed and replaced it with an Atmel ATMega88. The ATMega required a few changes to the board, but nothing too off the wall.

posted Feb 1st 2010 10:17am by
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600福利合集today our good friends over at are selling the leapfrog didj, a low cost educational toy aimed at little kids. lucky for hackers out there, the didj is actually , and gaining serial console access is as easy as . the documentation out there is a little outdated, with a number of broken links and stale wikis, but $25 for a portable linux device is a hard deal to beat. a list of sites which might be helpful are listed after the break, as well as the hardware specs of the didj.

600福利合集let us know if you have played around with hacking the didj before, and if you have any tips for other readers. don’t forget to with the didj as well!

thanks to [mark] for the tips and the hardware details.

(possibly) useful links:

600福利合集hardware specs:

* Processor: 393 MHz Arm 9
* Display: 320×240 resolution
* One 24-bit 2D layer (no hardware acceleration)
* One 16-bit 3D layer
* One YUV video layer (no hardware acceleration)
* Graphics: API OpenGL ES 1.1–A reduced instruction set version of OpenGL for embedded systems
* Main RAM: 32 MB DDRI 131 MHz
* NAND Flash: 256MB for data storage/download content
* Media Cartridge: 64MB
* System Software: Brio–Firmware is built on an abstraction layer called Brio to make OS and hardware transparent to developers. This means all software must be ported to Brio to run on this device.
600福利合集 * Screen LCD: 3.2 inches, 16.7-Million Color TFT

posted Dec 29th 2010 7:20am by
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wireshark, a tool recognized universally as being one of the best network analyzers available, has long been used by legitimate network professionals as well as a shadier crowd (and everywhere in between). while useful for analyzing both wired and wi-fi traffic, monitoring 802.15.4 protocols (such as zigbee) have not been a common use in the past. [akiba] of freaklabs has brought us which works around the normal limitations of wireshark’s libpcap base, which does not accept simple serial input fromtingmost homebrew setups that use ftdi or arduinos to connect to . using named pipes and a few custom scripts, [akiba] has been able to coax wireshark into accepting input from one of freaklabs freakduino boards.

600福利合集while there are certainly professional wireless analyzing tools out there that connect directly into wireshark, we at hackaday love showing off anyone who takes the difficult, cheap, out of the way method of doing things over the neat, expensive, commercial method any day.

posted Dec 18th 2011 12:16pm by
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this mirror has a large monitor behind it which can be operated using hand gestures. it’s the result of a team effort from [daniel burnham], [anuj patel], and [sam bell] tingfor their ece 4180 class at the georgia institute of technology.

600福利合集so far they’ve implemented four widget for the system. you can see the icons which activate each in the column to the right of the mirror. from top to bottom they are calendar, news, traffic, and weather. the video after the break shows the gestures used to control the display. first select the widget by holding your hand over the appropriate icon. next, bring that widget to the main display area by swiping from right to left along the top of the mirror.

600福利合集hardware details are shared more freely in (pdf). a sonar distance sensor activated the device when a user is close enough to the screen.tingseven ir reflectance sensors detect a hand placed in front of them. we like this input method, as it keep the ‘display’ area finger-print free. but we wonder if the ir sensors could be placed behind the glass instead of beside it?


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