Heat Wave Alert
Temperature monitoring with threshold-based alarm
Watch the circuit build itself: components drop in, wires connect, and the output comes alive.
Components
Everything you need for this project.
1x NTC thermistor (10K)
1x 10KΩ resistor
1x Red LED
1x Active buzzer
1x 220Ω resistor
5x jumper wires
How It Works
Thermistor-based temperature measurement, Steinhart-Hart equation (simplified), analog calibration, and threshold alerting.
What You Build
Thermistor voltage divider on A1, red LED on D1, buzzer on D2. Alarm triggers above a configurable temperature threshold.
African Context
Temperature monitoring is critical for vaccine cold chains, greenhouse farming, and food storage, all major challenges across the continent.
What You'll See
Display shows live temperature in °C. Warming the thermistor (pinching it) triggers the LED and buzzer alarm.