DIY Solar Tracker || How much solar energy can it save?

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Parts list (incomplete, see Instructables for more, affiliate links):
1x Arduino Nano:
2x SG90 Servo:
4x Photoresistor:
4x 1kohm Resistor:

1x Arduino Nano:
2x SG90 Servo:
4x Photoresistor:
4x 1kohm Resistor:

In this project I will show you how to create a solar tracker which like the name implies can follow the movement of the sun throughout the day. And at the end I will show you the energy harvest difference between a solar tracker mounted solar panel and a flat mounted solar panel.

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  1. I'm not sold on the underlying assumption of linearity here. The ratio between stationary/optimized solar panel output is inevitably going to change when you scale everything up, right?

    edit: probably shouldn't be extrapolating two hours of testing onto a full day either

  2. Hello sir thank you for sharing us you idea ang knowledge sir..sir can you send to me the data of arduino you that folliwing the light?thank sir good job..

  3. And you could save even more energy:
    For the tracking the sun you need only one motor. If you are tracking the sun, you don't have to bother with the azimuth and elevation – just tilt the vertical axis according your geographical latitude (so that you have equatorial mount, and not altazimuth mount you have used here).

    This way it will always track the ecliptic (the celestial trajectory of the sun), and you need only one servo to track the daily movement of the sun.
    This way the second servo would be needed only for the seasonal adjustment of the tilt (the ecliptic is higher in summer and lower in winter), but this would be totally negligible in terms of the energy consumption – probably an adjustment of 2 degrees of the elevation once a week would be sufficient.

  4. Hoping to build one of these with my daughter. Would you happen to be able to share your XAD files for the circular divided device with the resistors. Also, the code for the item to work, I'm not the greatest at coding. Thanks for the help!

  5. This is a brilliant no fuss tutorial.
    I can’t believe it got a thousand thumbs down.
    Shame on you keyboard idiots.
    Thanks for loading this up.
    I know know in just 8 minutes solar tracking is the way for me to go. Nice one brother.

  6. OK, it looks like you tried this out during mid day during summer. A lot more gain would be realised during winter when the sun peaks at about 15 degrees from the horizon. Solar tracking the daily travers has around 10% increase but annual tracking due to summer / winter elevation is considerably more.

  7. Has anyone factored how much energy has been put into producing and transporting that solar panel from extraction of natural resources all the way to point of sale? And then how much energy it will produce based on where it has been installed on the planet plus the life cycle of the panel? For all that matters, solar panels in some areas of this planet may be actually increasing carbon emotions.

  8. U love electronics right ? So please make a video on how you can make own radio transmitter receiver similar to that used in drones or rc cars, or any other ways to drastically increase range of radio control devices for example you can control a small truck capable of carrying some stuff from shop and you can control it from ur home . And that too with camera on it with gps

  9. I saw more of your videos you really are a real genius when it comes to moving solar panel with Any sunlight they are other ways moving solar doubt any Electronics with any sunlight

  10. ewwwwwwww why is the code full of blocking delays x']..
    JK haha, it's obviously just a POC =p Btw i love how at @8:38 we can see you hide the sun and the devices turns away to keep aimed at the light source x'] great job!

  11. It might also be the case that your solar tracking sensor shades a large portion of that solar panel. You might get more accurate results if you used a larger solar panel, or put the detector far enough away so that it can't cast a shadow on the panel. (This is not likely a large issue when it's tracking well because there's very little shadow) Additionally, some performance gains could be realized with a low-pass filter of some kind so that your servos aren't responding to passing clouds etc.

  12. Did you track the sun all the time, and power the servo motors like in the video? This is waste of energy. Only track the sun once in 30 minutes, then send tracking circuit and servos to sleep.

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