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More Information aaabattery.zip 3D Printable AAA Battery Forms [[Screenshots]]
These 3D-printable AAA batteries can be used to power battery-powered devices off of wall power. You'll need screws and washers to complete these batteries, as specified in the readme file included in the zip.
More Information buildgcn.zip On the Design and Usage of globalCALCnet (gCn) [[Screenshots] [10/10]]
To accompany the 1.0 release of the gCnClient software to connect networks of graphing calculators to and across the internet, this documentation describes the hardware and software necessary to use the gCnClient, including schematics of the gCn bridge device build on a simple commodity Arduino, the alternate cheaper USBHID design for more experienced users, troubleshooting, and instructions for programming the Arduino or USBHID Bridge on Windows, Linux, and Mac OS and using the gCnClient on any operating system.
More Information CALCnet2.2.zip CALCnet 2.2 Whitepaper [[Screenshots] [9.8/10]]
This technical report details the CALCnet 2.2 networking protocol for graphing calculators. It begins with an overview of the motivations and inspirations for CALCnet, then reviews the existing alternatives for two-calculator linking, namely the TI-OS, BELL by Tim "Timendus" Franssen, and TachyonLink by Michael Vincent, and n-calc linking, namely CLAP by Mr. Franssen. It goes on to introduce the electrical systems in the calculator for linking, then proceeds to an in-depth section explaining the bit-level, byte-level, and frame-level protocols for one-to-one and broadcast frames. Although the average CALCnet 2.2 user or even programmer does not need to know any of that, it might help in case a coder wants to write CALCnet 2.2 drivers for another platform (Arduino? libticables?). Next is the meat of the manual for end programmers, how to send and receive data via CALCnet 2.2. I include a full experimental results and benchmarking section, detailing the maximum speeds of CALCnet, the overhead incurred by the protocol, effects of frame size on burst throughput, an effectiveness of collision detection and delivery guarantees. It concludes with information on logos and branding, a survey of possible future work, and a summary of CALCnet2.2's strengths and features.
More Information gCalcNetShield.wip.zip Arduino Shield for Calcnet/KiCAD format
A work in progress KiCAD Schematic for an Arduino shield that supports 3 calculator networking. The shield footprint and schematic are in separate zip files. Put the Arduino shield files in the library path for KiCAD, and put the gCnBridge files in a project directory. There\'s a PDF of the schematic in there as well, although it's mostly the same as the schematic in the Calcnet documentation, apart from the connectors. I\'ve cross checked with the Sparkfun zigbee shield, and that seems to use D2/D3 on the Arduino, so there\'s some compatibility there. WiFi seems to be a bit up in the air, the Sparkfun WiFi shield takes up most of the data lines. I haven't looked at the new, official Arduino shield yet, nor have I looked at the Ethernet shields yet. I have 3 2.5mm connectors for serial connections to calculators, but I haven't broken out the calipers yet to figure out how many I can add to the end of the board, it may be a couple of more. I also don't have footprints yet for the 2.5mm connector I'm using, so that's coming. KiCAD http://www.kicad-pcb.org/display/KICAD/KiCad+EDA+Software+Suite
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