Thermometer with alarm
Calculate the temperature from an NTC, show it on a five-LED bar and sound an alarm when the limit is exceeded.
Hard55 minutesSteinhart–Hart / Beta equationfloat mathLED bar display
Parts
- ☐ Arduino Uno
- ☐ 10 kΩ NTC and 10 kΩ resistor
- ☐ 5 × LED and 5 × 220 Ω
- ☐ Passive buzzer
- ☐ Breadboard and jumper wires
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