## Wabbitemu TI Calculator Emulator

Developed By Spencer Putt, Chris Shappell, and James Montelongo

For Windows and Mac OS X and Android

From the project site:

• Wabbitemu – An accurate emulator/debugger for the TI-73, TI-81, TI-82, TI-83, TI-83+(SE), TI-84+(SE), TI-84+CSE, TI-85, and TI-86
• SPASM – The fastest Z80 assembler with extra features supporting TI calculator development
• Wabbitcode – An integrated development environment with auto-complete, syntax-highlighting, and comprehensive source-level debugging

Available on the Google Play Store

Wabbitemu creates a Texas Instruments graphing calculator right on your Android device. Wabbitemu supports the TI-73, TI-81, TI-82, TI-83, TI-83 Plus, TI-83 Plus Silver Edition, TI-84 Plus, TI-84 Plus Silver Edition, TI-85, and TI-86. Fast and convenient, Wabbitemu allows you to always have your trusty calculator with you. Because Wabbitemu is an emulator, the calculator it creates will act exactly like the real thing.
Wabbitemu, like all emulators, requires a ROM image. Wabbitemu includes an easy to use setup wizard that will help you create a ROM image for your TI.

If you need to make a ROM, you can download it from your calculator.  If you need help try clicking on appropriate link below:

## Solve Differential Equations with Wolfram Alpha

Wolfram Alpha now solves differential equations with step-by-step solutions!  They describe the new feature accordingly:

Wolfram|Alpha has become well-known for its ability to perform step-by-step math in a variety of areas. Today we’re pleased to introduce a new member to this family: step-by-step differential equations. Differential equations are fundamental to many fields, with applications such as describing spring-mass systems and circuits and modeling control systems.

From basic separable equations to solving with Laplace transforms, Wolfram|Alpha is a great way to guide yourself through a tough differential equation problem.

See examples and more on the Wolfram Alpha Blog.

## Wolfram|Alpha – Plotting Functions and Graphs in Wolfram|Alpha

The Wolfram|Alpha blog has published some information on plotting functions with Wolfram|Alpha.  The plots come out quite nice whether 2D, 3D, or contour, and you don’t need to install any software to do some quick plots.

Plotting Functions and Graphs in Wolfram|AlphaMay 17, 2011Plotting functions in the Cartesian plane is such a simple task with Wolfram|Alpha: just enter the function you are looking to graph, and within seconds you will have a beautiful result. If you are feeling daring, enter a multivariate function, and the result will be a 3D Cartesian graph. Wolfram|Alpha is certainly not limited to Cartesian plotting; we have the functionality to make number lines, 2D and 3D polar plots, 2D and 3D parametric plots, 2D and 3D contour plots, implicit plots, log plots, log-linear plots, matrix plots, surface of revolution plots, region plots, list plots, pie charts, histograms, and more. Furthermore, in Wolfram|Alpha we can generate specialized plots for illustrating asymptotes, cusps, maxima, minima, inflection points, saddle points, solutions of ordinary differential equations, poles, eigenvalues, series expansions, definite integrals, 2D inequalities, interpolating polynomials, least-squares best fits, and more. Let’s take a look at the plotting functionality in Wolfram|Alpha, some of which is newly improved!We will start simple with 2D Cartesian plots.

## Andie Graph

Andie GraphGet a TI-82, TI-83, TI-85, AND TI-86 emulator for your phone!ROM NOT INCLUDED. Due to a request from TI, this app will NOT WORK until you EXTRACT YOUR OWN ROM. See http://supware.net/roms for details. This is similar to other emulators on the market: GameBoid, SNESoid, GBAEmulator, NESoid, psx4droid, etc The TI-8X series of calculators work great as standalone calculators, showing 8 lines of history, using standard mathematical notation.

## Microsoft Mathematics 4.0

﻿﻿Microsoft Mathematics 4.0 is a free mathematics program from Microsoft (if you couldn’t already tell that from the name) for Windows.  It is definitely a better upgrade to the standa﻿rd windows calculator, and keeps a notebook of calculations/graphs.  It is more geared toward students, but can be useful for a general graphing calculator for anyone.  It can also be ﻿used with a tablet computer and stylus to accept written input.

Mi﻿crosoft Mathematics provides a graphing calculator that plots in 2D and 3D, step-by-step equation solving, and useful tools to help students with math and science studies.

Microsoft Mathematics provides a set of mathematical tools that help students get school work done quickly and easily. With Microsoft Mathematics, students can learn to solve equations step-by-step while gaining a better understanding of fundamental concepts in pre-algebra, algebra, trigonometry, physics, chemistry, and calculus.

Microsoft Mathematics includes a full-featured graphing calculator that’s designed to work just like a handheld calculator. Additional math tools help you evaluate triangles, convert from one system of units to another, and solve systems of equations.

## HP-48 Emulator for Android

For those of you who just loved your RPN HP48 graphing calculator and have an android phone, this app is for you.  Just looking at the screen brings back memories.  The developers have faithfully recreated the original calculator’s look and feel.  If you are a RPN fan, and you need a little more power than just a scientific calculator on your phone, then this is definitely worth a look.  From the developers:

HP 48 lives again on Android!

Emulator of the HP 48 scientific calculator, using RPN. Port of the X48 project (sources available on github). HP48’s “grayscale mode” cannot be emulated.

Visit www.hpcalc.org for a large program collection.

Cool tip: tap the HP’s LCD to show/hide a simpler numeric pad !

RPN calculator (The HP-48) Emulator for Android Screenshots (from the developer website):

https://market.android.com/details?id=org.ab.x48

## RealCalc Scientific Calculator

RealCalc Scientific Calculator for Android is made by Quartic Software.  This is a great standard scientific calculator which only shows one entry at a time.  There is also a setting for RPN functionality.  This is a great substitute if you want to leave your scientific calculator behind and need to do some light calculations using your Android phone.  This app is not very processor intensive.  Two screenshots from the developer’s website are below:

For more details visit their web link:

https://market.android.com/details?id=uk.co.nickfines.RealCalc

## GraphCalc The Ultimate Windows 2D/3D Graphing Calculator Software

This week, The Engineering Zone will feature calculator applications.

One of my Favorite PC calculators is GraphCalc (also available for Linux).  It is fast, easy, and you can use your number pad for input.  Even though it was last updated in 2003, it still works great on newer computers with Win7.

GraphCalc is ready to use out of the box. Don’t bother reading the documentation. Just start the program and you’ll see how easy it is to use.

Have a look at some screen shots of GraphCalc

This software is free and open source, so you can use it everywhere.  You can even export the 3d plots to DXF files.  These files can be imported into other programs.  This is convenient for surfaces that can be defined by a mathematical equation.

## Wolfram|Alpha – Intro

Wolfram|Alpha is becoming a more valuable tool for engineers practically every day.  If you haven’t used it before, you should definitely check it out.  Their goals are summarized on their info page:

Goals

Wolfram|Alpha’s long-term goal is to make all systematic knowledge immediately computable and accessible to everyone.

We aim to collect and curate all objective data; implement every known model, method, and algorithm; and make it possible to compute whatever can be computed about anything. Our goal is to build on the achievements of science and other systematizations of knowledge to provide a single source that can be relied on by everyone for definitive answers to factual queries.

Wolfram|Alpha aims to bring expert-level knowledge and capabilities to the broadest possible range of people—spanning all professions and education levels.

Our goal is to accept completely free-form input, and to serve as a knowledge engine that generates powerful results and presents them with maximum clarity.

Wolfram|Alpha is an ambitious, long-term intellectual endeavor that we intend will deliver increasing capabilities over the years and decades to come.

With a world-class team and participation from top outside experts in countless fields, our goal is to create something that will stand as a major milestone of 21st century intellectual achievement.

You can do a lot with it.  It can definitely serve as a quick replacement when you need to consult an infrequently-used table for some data.  What is the bulk density of sand?  Need to know the coefficient of thermal expansion for Copper?  What about the general properties of elemental Silicon?  Need to solve some engineering problems?  These examples only scratch the surface of the large number of topics that Wolfram|Alpha covers.

## Welcome to The Engineering Zone

Welcome to The Engineering Zone.  This is our first official post.  If you have any information or articles to share, you can post it in the comments.  Comments also support $\LaTeX$ markup for equations for those technical topics.  For example if you substitute a space for the astersik in the following line:

$latex*c= \sqrt{a^2+b^2}$

you get

$c= \sqrt{a^2+b^2}$

For more information, see the information from WordPress.  Wikipedia also has a list of the syntax available.