T³ Schweiz Resources

Mood Ring for TI-84 Plus CE (OS 5.3 and above)

Mood Ring for TI-84 Plus CE (OS 5.3 and above)

Texas Instruments Inc.

Fach: Computer ScienceSTEM


Bring science and coding together (no coding experience necessary) while developing a mood ring! The science of color mixing is explored while determining the right body temperature thresholds.

Make a Mood Ring
This project is a fun way to begin your STEM and coding journey 


Students create a system to control the color of an LED based on the temperature of their finger.

Science of Color


Feedback and Control systems

Temperature sensor input

Color LED output

Coding Concepts:


  Conditional Statements



Digital Mood Ring Project Downloads

Teacher Document   PDF  link  Word doc  link

Student Document   PDF  link  Word doc  link

TI-84 Plus CE .8XP Programs in Zip File  link


Teacher Background Resources (optional)  PDF  link  Powerpoint ppt  link


Compound Inequalities Worksheet (optional)  PDF link  Word doc  link

Compound Inequalities Example Solution (optional)  PDF  link



Learn to do the project yourself

Download Learn to do the project PDF link

View step-by-step Youtube videos link


Setting up

NEW September 2019: Update your TI-84 Plus CE, TI SmartView CE emulator software and TI-Innovator sketch link

Download a tutorial on using the TI Connect CE software for program editing and transferring files to and from your calculator  PDF link  


See other projects at www.TIstemProjects.com

Contact STEM-team@ti.com with questions or comments about the project.

Publisher specific license