This a demonstration of solar tracker controlled by arduino board.
Tracker position is determined by comparing voltage drops across two photoresistors.
Step 1: Tracker Components
For this simple 1D solar tracker, we need for:
1. Arduino board.
2. Two photoresistors.
3. One servo-motor.
4. Solar cell/mini-module.
Step 2: Construction of Voltage Dividers
The solar sensor in our case is a simple two voltage dividers.
Construct a two voltage dividers using one photoresistor and a 10k resistor each.
Than, mounting this sensor on a Servomotor.
Step 3: Arduino Code
Attach Sensor outputs to Arduino board analog input A0 and A1.
Attach Servo signal wire to digital pin 9.
Upload the code and go on!