Digital Mood Ring

This video provides a brief overview of the TI-Nspire™ CX II graphing calculator and how to use it.

This video provides a brief overview of the TI-Nspire™ CX II graphing calculator and how to use it.

This video provides a brief overview of the TI-Nspire™ CX II graphing calculator and how to use it.

Are you new to Python? This video walks you through the process of creating a simple Python program on the TI-Nspire™ CX II graphing calculator.

Are you new to Python? This video walks you through the process of creating a simple Python program on the TI-Nspire™ CX II graphing calculator.

Discover the science behind real mood rings and how the famous color-changing stones actually work.

Discover the science behind real mood rings and how the famous color-changing stones actually work.

Discover the science behind real mood rings and how the famous color-changing stones actually work.

The color LED is controlled with the statement “color.rgb” for red value, green value and blue value.

The color LED is controlled with the statement “color.rgb” for red value, green value and blue value.

The color LED is controlled with the statement “color.rgb” for red value, green value and blue value.

What secondary color is created from mixing two primary colors? What happens when all three overlap? This activity lets you experiment to find out.

What secondary color is created from mixing two primary colors? What happens when all three overlap? This activity lets you experiment to find out.

What secondary color is created from mixing two primary colors? What happens when all three overlap? This activity lets you experiment to find out.

Use the color mixing simulation as a clue to figure out the RGB values for the secondary colors cyan, yellow and magenta. Write a program that displays all three. Use “sleep(2)” for a two-second pause between colors.

Use the color mixing simulation as a clue to figure out the RGB values for the secondary colors cyan, yellow and magenta. Write a program that displays all three. Use “sleep(2)” for a two-second pause between colors.

Use the color mixing simulation as a clue to figure out the RGB values for the secondary colors cyan, yellow and magenta. Write a program that displays all three. Use “sleep(2)” for a two-second pause between colors.

Use the color mixing simulation as a clue to figure out the RGB values for white. Write a program that displays white and two darker shades of white (grayer). Use “sleep(2)” for a two-second pause between shades.

This optional video continues Coding Challenge 3 with additional context and information.

Check out the range of electromagnetic radiation (EMR) that exists in the universe, including the narrow region humans perceive called “visible light.”

Check out the range of electromagnetic radiation (EMR) that exists in the universe, including the narrow region humans perceive called “visible light.”

Using the simulation to explore the RGB values and wavelengths of different colors. Try to find the values of the primary and secondary colors.

Using the simulation to explore the RGB values and wavelengths of different colors. Try to find the values of the primary and secondary colors.

This optional video continues Science Activity 3 with additional context and information.

Write a program that displays your favorite color using the RGB values from Science Activity 3.

Write a program that displays your favorite color using the RGB values from Science Activity 3.

Using the previous activities and your knowledge of color, find the RGB values for all of the colors listed. Use the RGB values you record in the Science Activity 4 spreadsheet to write a program that displays each mood ring color on the color LED.

Using the previous activities and your knowledge of color, find the RGB values for all of the colors listed. Use the RGB values you record in the Science Activity 4 spreadsheet to write a program that displays each mood ring color on the color LED.

Different colors can be created by mixing the brightness of the primary colors. The statement “color.rgb” sets the brightness of each element in the color LED.

The human eye has a lens that focuses light onto the retina at the back of the eye. When colored light enters the eye, each cone cell produces a weak to a strong stimulus that travels along the optic nerve and enters the brain.

Try out more fun experiments if you have the supplies available. Place a blue plastic filter over an eye and view a green plant with that eye. How does it appear? Explain why.

The differences between people's eyes can result in slight variances in perceptions of particular colors, or “color blindness.”

Georges Seurat was a 19th century French painter who used the pointillism method. A modern TV or mobile phone screen is composed of millions of tiny color LEDs packed tightly behind a glass screen.

This optional video continues Coding Challenge 1 with additional context and information.

Choose five mood messages from the previous list. Write a program to display them on the TI-Nspire™ CX II graphing calculator, each on a different line.

Choose five mood messages from the previous list. Write a program to display them on the TI-Nspire™ CX II graphing calculator, each on a different line.

Connect the temperature sensor to “IN 1” to write a program that creates a temperature object named “my_temp.” Measure the my_temp object and store value in the variable named temp.

Connect the temperature sensor to “IN 1” to write a program that creates a temperature object named “my_temp.” Measure the my_temp object and store value in the variable named temp.

Use the program from Coding Challenge 8 to explore the temperatures around you. What is the temperature of the room? What is the temperature of your skin?

Use the program from Coding Challenge 8 to explore the temperatures around you. What is the temperature of the room? What is the temperature of your skin?

Write a program using a For loop that will read and display 10 temperature measurements. Use “sleep(2)” for a two-second pause in each cycle.

Write a program using a For loop that will read and display 10 temperature measurements. Use “sleep(2)” for a two-second pause in each cycle.

Use a While loop to continuously monitor temperature, and include an If conditional statement using appropriate temperatures to display the text and LED color.

Use a While to continuously monitor temperature, and include an If conditional statement using appropriate temperatures to display the text and LED color.

Combine your knowledge from all previous coding challenges to design and code your very own digital mood ring. Your program should display mood messages and colors over a range of finger temperatures.

Combine your knowledge from all previous coding challenges to design and code your very own digital mood ring. Your program should display mood messages and colors over a range of finger temperatures.

Combine your knowledge from all previous coding challenges to design and code your very own digital mood ring. Your program should display mood messages and colors over a range of finger temperatures.