When I got into electrical circuits and solar power the first thing I wanted to do was build a little solar powered battery charger. Only I had a heck of a time trying to find a simple and strait forward guide to doing this.
$4 Solar Battery Charger – [Link]
Christian writes: [via]
Having your own egg laying chickens in times of food scandals like the latest dioxin scandal is a fine thing. Although these chickens from my little cousin on the pictures here are not some fancy bred “hybrid chicken”, they lay almost one egg a day during summer and live a happy life. They have a large area to peck and paw and sleep inside a beautiful coop.
However, keeping chickens has one major drawback: You have to get up with them in the early morning and open the door at the coop. Everyday. Including Sundays and holidays. It can be quite tedious sometimes. That’s why my litte cousin asked me to construct an automated door for his chicken coop that opens at the break of dawn and closes at dusk.
The actuator raising and lowering the door is a strong gear motor from a wiper. I bought it at a local scrap merchant for 10 euros. The motor includes a worm drive so it holds its position when powered off.
Two switches in a parallel arrangement recognize when the door is open or closed. Because of the parallel arrangement, the microcontroller can only recognize that the door has reached an end position but not which one. This mean saves one input/output controller.
As sensor for the brightness, I use a photoconductive cell.
The whole system gets its power from a 12 V / 7 Ah accu. It can be charged by a small 2.1 W solar panel.
Solar Powered, MSP430-based Automatic Chicken Coop – [Link]
A team of researchers at French WYSIPS (what you seem is photovoltaic surface) claim to have developed a film that’s accurate to within a pixel. The technology they say can provide a high-definition solution applicable to all types of screens. Just like touch screen technology, Wysips is designed to become an integral part of the screen, allowing all tomorrow’s telephones to produce their own power from the sun. [via]
Mobile phones and laptops charge from the sun – [Link]
This month, Shawn Blaszak, at Pumping Station: One, shows how to convert a standard TV remote control to solar power. Leave your remote sitting on a sunny windowsill and let it top off the charge in your batteries while you are away from the TV. [via]
Solar Powered Remote Control – [Link]
An attempt to make a good solar reflector out of mirror pieces and a Direct TV satellite dish
Building a Parabolic Solar Reflector out of a Satellite Dish - [Link]
Make writes: [via]
With the Solar TV Remote project from MAKE Volume 25, you’ll never have to replace your remote control’s batteries again. Instead, just leave it in the sun to charge up! This project is fairly easy and you may already have most of the tools and supplies you’ll need.
Solar TV remote - [Link]
MintyStick! Andrew writes:
Finally, I have succeeding in producing my own variation on the MintyBoost. I found inspiration on this post (http://forums.adafruit.com/viewtopic.php?f=15&t=18225) on the Adafruit forums. It looks like a stick of gum, and I like it, because it’s single-sided, and because it looked like it would be pretty easy to make at home with my toner transfer setup. I call it the MintStick, because sometimes I don’t like to spend a lot of time trying to come up with good names for things. It’s version 3.0 to indicate compatibility with the MintyBoost 3.0 (since it ought to support the same devices).
MintyStick – Solar Charger – [Link]