See the Buying Guide for more details on what and where to buy materials for this activity.

Each group needs:

• Arduino^TM Uno Development Board or equivalent
• breadboard
• computer with Arduino IDE software loaded; download the Arduino software from https://www.arduino.cc/en/Main/Software
• USB cable, for powering Arduino/uploading code
• 10 wires to connect components, such as 6- or 7-inch jumper wires for Arduino boards
• 3 LEDs
• TMP36 temperature sensor
• 3 220 ohm (Ω) resistors; alternatively, use 330 ohm resistors
• 1-megaohm (MΩ) resistor
• IRF510 n-channel MOSFET (metal-oxide-semiconductor field-effect transistor)
• 12V computer cooling fan
• 12V AC adapter, to power the fan
• Circuit Building Instructions Sheet, one per student
• science notebook, journal or paper, and pen or pencil, for each student