Archive for the ‘solar’ Category

A solar charge controller made with Arduino

Wednesday, May 7th, 2014


Instructables user deba168 is an electrical engineer based in India. He posted a tutorial to solve a common problem in his country:

In India most of the people are living in rural area where national grid transmission line is not reached till now.The existing electric grids are not capable of supplying the electricity need to those poor people. So renewable energy sources (photo voltaic panels and wind-generators) are the best option I think. I know better about the pain of village life as I am also from that area. So I designed this DIY solar charge controller to help others as well as for my home.You can’t believe, my home made solar lighting system helps a lot during the recent Cyclone Phailin.


He then  made a charge controller  running on the Arduino Uno and with an important task: to protect the rechargeable battery of photovoltaic systems. It regulates the voltage and current coming from the solar panels and it’s placed between a solar panel and its battery . It is used to maintain the proper charging voltage on the batteries so as the input voltage from the solar panel rises, the charge controller regulates it,  preventing any over charging. It works on the principle of PWM which improves efficiency of the solar PV systems.

You can follow all the steps on his page but first take a look at the video:

The best possible solar dish

Monday, May 7th, 2012

The build is part of a high school class and they packed in some really nice features. The first is the parabolic mirror which focuses the sun’s rays on the chamber of the engine. The heat is what makes it go, and the video after the breaks shows it doing just that.

But the concept behind the mirror makes for an interesting challenge. The light energy is focused at a narrow point. When the sun moves in the sky that point will no longer be at an efficient position to power the engine. This issue is solved by a pair of stepper motors which can reposition the dish. It’s done automatically by an Arduino Uno which makes readings from four LDR (photoresistors) in that cardboard tube mounted at the top of the dish. If the light intensity is the same for all four, then the tube is pointed at the sun. If not, the motors are tweaked to get the best angle possible.


B-Squares: Modular Solar Power For Arduino

Tuesday, May 3rd, 2011

Shawn & Jordan wrote me about this project their are trying to put in production, with kictstarter.

We made B-Squares for ourselves at first, since we’re guys who like to make things too.  While working on another project dealing with solar batteries in emerging markets this January, we put together a few crude prototypes of what would become B-Squares, thought it pretty amazing, and decided to push to pre-production ourselves.  Now we’re trying to complete the journey and make it a real product with our launch on Kickstarter.

The mounting surface allows Arduino Pro to fit and be powered by the 3.3V of the B-Squares. I wonder if a standard Arduino module with its standar 5v  is on the way to come.

via [B-Square on kickstarter]

Sun Tracking Solar Panel with Arduino

Wednesday, May 12th, 2010

I h?? ??m? ??tt?? solar panels laying around ??? wanted t? see ?f t??? w???? power t?? Arduino. T??? ???. S?, I wanted t? see ?f I ????? m?k? a sun tracking circuit t? autonomously follow t?? sun throughout t?? day. S? I did. Here ?? t?? result. If ??? wanna try ?t, ??? ??n download ?t:  T?? code ?? n?t perfect ?r commented. Enj??

via [solarpowerforhomes]