SunTracker2 Revision 4
This prototype is a follow-up project to SunTracker2 Revision 3, expanding into dual-axis control with optical endstops, GPS, wireless data transmission (XBee), and a 2.8" TFT display.
The design target is a self-orienting dual-axis, scheduled, Arduino-based solar tracker model, demonstrating PV panel orientation for both Elevation and Azimuth angles (dual-axis). The Sun orientation is achieved through pre-calculated solar position data for a specific geographic location and time (scheduled).
In order to clearly understand, demonstrate and validate the sun tracking function, a 48 dual-color LED ring represents the horizon with north, sunrise and sunset indicators. A green indicator displays the suns daily movement over time. Two NEMA stepper motors align the solar panel model with the sun.
Mainboard PCB, bottom layer
Mainboard, fully populated
Mainboard, TFT display layout
Displayboard, IO Expander close-up
Mainboard and Displayboard connected