Teacher's guide

Part 0

At the beginning of the lesson, you can show videos to your students in order to get them familiar with the topic. There are plenty of them at YouTube. Just an example is the video bellow.

Some theory about the Stroboscopic effect can be found at:

• https://en.wikipedia.org/wiki/Stroboscopic_effect

Part 1

In this part the students will create their first stroboscopic light.

• worksheet (pdf or word)

• solutions of worksheet

• list of items needed for each team

• source codes for Arduino

Part 2

In this part the students will observe bayblade or spinner using a stroboscopic light. The frequency of the strobe light is kept fixed while the object reduces its rotation frequency.

• worksheet (pdf or word)

• source codes for Arduino

Videos of the result:

Part 3

In this part the students will change Arduino's program and circuit in order to be able to change LED's frequency with a potentiometer.

• worksheet (pdf or word)

• solutions of worksheet

• source codes for Arduino

Part 4

In this part the students will observe a fan using a stroboscopic light. The frequency of the fan is fixed while the students will change the frequency of the strobe light.

• worksheet (pdf or word)

Video of the result: