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Welcome to Cemetech! Since 1999, Cemetech (pronounced KE'me'tek) has been developing software and hardware in many technology-related fields. Among Cemetech's specialties are TI graphing calculators such as the TI-83+/SE and TI-84+/SE, the Casio Prizm graphing calculator, web programming, and DIY hardware projects and modifications.

Our members, enthusiasts, experts, and teachers are led by Kerm Martian, né Christopher Mitchell. Since 2004 he held the title of the world's most prolific graphing calculator programmer, with over 400 completed programs and more than 1.2 million direct downloads. He has also developed many software and hardware projects. Our staff of friendly volunteers hang out on our forum and IRC and SAX chatrooms, and are happy to answer questions.

Numbers: 667 articles have been posted in Cemetech's News Archives. View current site statistics. Within the last seven days, 7 files have been added to the file archives. Click to show the new files.

Latest Forum Posts
Dino Puzzle Lua by KermMartian
ArTICL: Arduino TI Calculator Linking Library by geekboy1011
Candid Photos by geekboy1011
LED Marquee by geekboy1011

Cemetech Labs Updates
WiFi globalCALCnet with the Spark Core on 10/5/2014
Developing WiFi Calculator Communication with the Spark Core on 9/27/2014
PartyMode 2.0: The One-Room Instant Disco on 6/22/2014
Cemetech At World Maker Faire 2014 Plans on 5/28/2014

Highlights
SourceCoder 3 TI-BASIC Editor/IDE  jsTIfied online TI-83+/TI-84+ emulator  Cemetech Forum  Cemetech Projects  TI-83+/84+ Programs and Games  Casio Prizm Programs and Games  Using the TI-83 Plus/TI-84 Plus  Programming the TI-83 Plus/84 Plus  Doors CS 7  United-TI Fora  WikiPrizm 
ArTICL: Arduino TI Calculator Linking Library
Published by KermMartian on October 30, 2014 at 11:45:15 PM CST | Discuss this article (3)

In early 2010, we published a set of rudimentary routines to link graphing calculators to Arduino boards. In the intervening four years, a number of developers have given me feedback on the routines, including features that they'd like to see and improvements that could be made. Those improvements have made their way into a new library called ArTICL (Arduino-TI Calculator Linking). Like any good Arduino library, it contains a set of classes you can use in your own Arduino programs, plus a handful examples made by yours truly and other Cemetech members. We plan to continue to expand the library and eventually create one or more lesson plans that teachers could use to teach rudimentary electronics and programming with TI-83 Plus or TI-84 Plus calculators and Arduinos.

The ArTICL library (pronounced "article") lets Arduino programs send and receive TI link protocol-formatted packets at a low level. In addition, it includes a CBL2 class that lets the calculator emulate either a CBL2 device or a calculator speaking the CBL2 protocol (thanks to Cemetech member CVSoft for helping to make this possible). This means that you can use the Send() and Get() commands on your graphing calculator to control the Arduino, including turning LEDs and motors on and off, reading the state of buttons and switches, and performing measurements with sensors. You could even use the ArTICL library to control a Norland Research robot with an Arduino. The attached topic will be updated as the library progresses. In the meantime, check out the video below demonstrating toggling LEDs on and off with the Send() command on a calculator, and feel free to contribute to ArTICL by sending a pull request on GitHub.

More Information
ArTICL library on GitHub
ArTICL LED control demo video



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STEM Behind Hollywood: Zombie Apocalypse Part 1 (TI-84+CSE)
Published by KermMartian on October 27, 2014 at 1:24:47 AM CST | Discuss this article (1)

Two and a half weeks ago, we announced Earth Impact! activity for the TI-84 Plus C Silver Edition from TI Education's STEM Behind Hollywood series. Back in early 2014, we presented the teaching community's overwhelmingly positive reaction to the Zombie Apocalypse TI-Nspire activity, and I am happy to now present Zombie Apocalypse Part 1 for the TI-84 Plus C Silver Edition.

In Zombie Apocalypse Part 1, students learn about epidemiology and human anatomy in the context of a virulent "zombie virus". They explore the spread of diseases, what the virulence of a disease means for its success, the structure and function of parts of the human brain, and the roles of vaccines and immunization. This port of the Zombie Apocalypse Part 1 activity brings the excitement and education of TI's STEM Behind Hollywood program to the TI-84 Plus C Silver Edition. Made for Doors CSE 8.1 or higher, it provides the same engrossing facts, simulations, pictures, and assessments. Besides the on-calculator activity itself, it includes thorough teacher notes and a student handout, both heavily adapted from TI's original material. We would love to hear your feedback in the attached topic if you use this activity in your own classroom, and after a brief hiatus to create calculator-based programming and electronics lessons, we plan to soon port Zombie Apocalypse Part 2: The Humans Strike Back to the TI-84 Plus C Silver Edition. We tip our hats deeply to Texas Instruments and their hard work in creating the original material for this activity.

Download:
Zombie Apocalypse Part 1 activity for the TI-84 Plus C Silver Edition



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STEM Behind Hollywood: Earth Impact! for TI-84 Plus C SE
Published by KermMartian on October 10, 2014 at 1:58:01 PM CST | Discuss this article (2)

Cemetech has posted a number of articles on TI's STEM Behind Hollywood initiative, starting with the first announcement of the project, and continuing with the overwhelmingly positive reception at T^3 and the first two-part activity, Zombie Apocalypse. For Cemetech Programming Contest #12, Lorenzo "Ordelore" Orders planned to port the Earth Impact! activity, as detailed in his contest topic. Unfortunately, after learning about the gravitational force equation that governs cosmological movement, he was forced to drop out of the contest. I was inspired by his code, and ended up starting from scratch to create a TI-84 Plus C Silver Edition version of Earth Impact!

In Earth Impact!, students learn about gravitational force while they work to keep an asteroid from striking the Earth. This port of the Earth Impact! activity brings the excitement and education of TI's STEM Behind Hollywood program to the TI-84 Plus C Silver Edition. Made for Doors CSE 8.1 or higher, it provides the same engrossing lessons about Newton's law of universal gravitation, density, force, and other STEM topic that the TI-Nspire activity provides. Besides the on-calculator activity itself, it includes thorough teacher notes and a student handout, both heavily adapted from TI's original material. We would love to hear your feedback in the attached topic if you use this activity in your own classroom, and we plan to soon port Zombie Apocalypse, Body of Evidence, and Science Friction! to the TI-84 Plus C Silver Edition. We tip our hats deeply to Texas Instruments and their hard work in creating the original material for this activity.

Download:
Earth Impact! STEM activity for the TI-84 Plus C Silver Edition



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New HP Prime Revision C and Wireless Module
Published by tifreak8x on October 7, 2014 at 1:31:11 PM CST | Discuss this article (1)

Back in May, bhtooefr posted on Cemetech about a boondoggle with the HP Prime: Revision A devices could not use the promised wireless module. User balrog popped into IRC this morning and dropped a bit of news on us; Europe now has a new revision of the Prime in Europe. This promised Revision C fixes problems that they were having with the wireless kits that they have, and it seems the wireless kit itself is now available for purchase.

Announced in June 2014 in a Google Groups post, this new revision remains difficult-to-find in the US. The wireless device itself is described on educalc.net. Available information stresses that the wireless device, which strongly resembles the bright yellow wireless module for the TI-Nspire, can only be used for base station-to-calculator communication. Calculator-to-calculator communicate remains possible only with a wired cable.



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