STEM Resources

Modeling the Four Chamber Heart for the TI-Nspire CX

Modeling the Four Chamber Heart for the TI-Nspire CX

Publisher: Texas Instruments Inc.

Author: Frederick Fotsch

Topic:  Biology, Computer Science, STEM

Tags: Biology, Coding, Electricity, Engineering, Simulation, STEM

Students model the electrical activity of a four chamber heart using coding, LED's and Play-Doh, an electrically conductive modeling compound.

Build a four-chambered heart

Students will design a model of a four-chambered heart


Heart anatomy and Homeostasis

Calculation of rates (beats per minute)

Feedback and control system

Temperature sensor input

LED and sound output

Coding concepts:


  Conditional Statements



Learn to do the project yourself


Step 1: Get a practice kit from the TI STEM Team. 

Go to  Click on the  Get Started Now button. Then fill out the form to begin the conversation with the TI STEM Team.


Step 2: Do the following:


A. 10 Minutes of Code with the TI-Innovator Unit 1.  

These are step-by-step instructions that will give you a foundation for creating, running and editing TI-Basic programs with the TI-Innovator Hub.

Follow this link. Click on Unit 1 and then click step by step to go through the skill builders. (Note: Units 2 and 3 are also useful.)


B. Digital Mood Ring Project.

We have found this to be a great first project for doing feedback and control systems. The topic is fun and the set-up is not intimidating.

You will cover foundational concepts for programming and for feedback and control systems. After doing this project both adults and students say that the more advanced projects no longer look so overwhelming. 

Make sure to download and follow the “By Challenges” Teacher document and example programs at this link.

Also, we highly recommend a set of YouTube videos that we created based on workshops with teachers preparing to lead summer camps. Follow this link.


C. You are ready for this project. Download the teacher document, example programs and any other files from this page. Work through the challenges in the teacher document.


See other projects at

Contact with questions or comments.


Publisher specific license