Project 4 · Arduino

Love-o-Meter

Measure body heat with a TMP36 and light up 1, 2 or 3 LEDs.

Easy 35 min 6 components
Love-o-Meter wiring diagram

What you'll learn

  • Read an analog sensor with analogRead.
  • Convert a raw 0–1023 value into volts and degrees Celsius.
  • Print live values to the Serial Monitor for debugging.
  • Drive multiple LEDs based on threshold comparisons.

What's in the kit

  • Arduino UNO
  • Breadboard
  • TMP36 temperature sensor
  • Green / Yellow / Red LED×3
  • 220 Ω resistor×3
  • Jumper wires×8

Protocol: analog