Farm Soil Monitor
Monitor soil moisture levels with visual LED indicators
Watch the circuit build itself: components drop in, wires connect, and the output comes alive.
Components
Everything you need for this project.
1x Capacitive soil moisture sensor
1x Red LED
1x Green LED
2x 220Ω resistors
5x jumper wires
How It Works
Capacitive sensor interfacing, analog signal interpretation, multi-threshold decision logic, and practical sensor calibration.
What You Build
Soil sensor on A1, green LED on D1 (moist), red LED on D2 (dry). Includes a calibration step to define wet/dry thresholds.
African Context
Agriculture supports 60%+ of sub-Saharan Africa's population. This sensor circuit is used in real precision agriculture projects across Kenya, Nigeria, and South Africa.
What You'll See
Real-time moisture percentage bar. Green LED for moist, red for dry. Calibration teaches students to set their own thresholds.