Arduino project · Temperature and climate · Hard
Dual Axis Solar Tracker with Weather LCD
A two-axis solar tracker that also shows the air temperature and humidity on an LCD.
What you will learn
- How to combine a tracker with a weather display
- How many parts share one Arduino
- Why heat reduces solar panel output
How it works
The servos follow the light as in the dual-axis tracker. The DHT11 sensor gives temperature and humidity for the LCD. The Compare step checks one sensor against another, so you do not need to set a fixed number.
Try this next
- Send the readings to the cloud.
- Add a buzzer for high temperature.
- Compare output with and without tracking.
The simulator program and explanation on this page are original. The idea follows a classic Arduino project that students have built for years.
Parts: sensors and actuators (tap to show or hide)
Try the inputs (virtual sensors)
Pins (you can change them)
| Part | Arduino pin (change it here) | How to wire it |
|---|
Every wire, one by one
Red rail = 5 V from the Arduino 5V pin. Black rail = GND. The coloured wires carry signals. Match the wire colours on the drawing to this list.
| # | Colour | From (part and leg) | To |
|---|
Steps run from top to bottom, then start again. While the simulation runs, the active step is highlighted in green.
Quantities come from the parts you added. The store links open a search for that item on Robu.in, Amazon.in and ThinkRobotics, so you always see what is in stock today. Check the model, voltage and price before you order.
| # | Item | Qty | Search term | Buy / compare |
|---|
The PDF has the circuit sketch, pin table, every wire, sequence, full code, the parts list with store links, do’s and don’ts for each part, and the safety notes. The project file lets you come back and keep editing.
In the real world
A solar panel following the sun
Change the two light sliders. The sun moves to one side and the servo tilts the panel towards it, to catch more sunlight.
Tip: use the gold tab at the bottom of the circuit drawing to pull the real-world view up over the Arduino board. Your parts stay visible above it, so you can press a button and watch the real scene react.
- Two light sensors = where the sun is
- Servo = the panel tilt