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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: 666 articles have been posted in Cemetech's News Archives. View current site statistics. Within the last seven days, 6 files have been added to the file archives. Click to show the new files.

Latest Forum Posts
Cemetech Contest #12 Results and Winners by KermMartian
Robot War 2: The Bionic Wars by DJ_O
Cemetech minecraft server: Plugin idea by CalebHansberry
[CSE] Doodle god by zeldaking

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 
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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WiFi globalCALCnet with the Spark Core
Published by KermMartian on October 5, 2014 at 12:00:08 PM CST | Discuss this article (26)

Two weeks ago, the folks from Spark gave us two Spark Core WiFi development boards. These unique boards are based around TI's CC3000 chip, and also include an STM32F103 microcontroller for running user code. One of the key selling points of the Spark Core is that it includes a library providing compatibility with the Arduino Wiring "language". It was the work of two weeks to port my Arduino globalCALCnet bridge (first announced here in 2011) to the Spark Core, then integrate the functionality of the gCn Bridge code.

Previously, connecting a local-area CALCnet2.2 network to the wide-area globalCALCnet network required an internet-connected computer. A piece of software running on the computer, called the gCn Bridge, was responsible for encapsulating incoming packets ("frames") from calculators in TCP/IP packets and sending them across the internet, and unpacking incoming packets to deliver back to calculators. A previous Cemetech project attempted to use the ENC28J60 Ethernet module to directly connect CALCnet2.2 to globalCALCnet, but that project was put indefinitely on hold in 2013. This current project achieves all the goals of that project, and more: it provides a computer-free way to connect calculators to the internet, and lets the calculators independently configure the bridge device as well. The two components that were necessary to make this work are the Spark Core firmware itself, modified and expanded from the original Arduino gCn bridge firmware, and a Bridge Configurator program written in TI-BASIC that is used to set the WiFi credentials and local and remote gCn hub names on the Spark Core.

You can view a video of the device in action below, as well as download the Spark Core firmware and the gCn Bridge Configurator program at the links provided. I look forward to seeing more exciting developments based on this project.

Downloads and Information
WiFi Bridge firmware for Spark Core
Bridge Configurator program
Video of WiFi gCn in action



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