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I found this great tutorial video on how to make your own solar heater out of household products.  If you already have the materials then its free, but you can buy everything you need for under $30.  The creator, Ross, estimates that it will raise the temperature of a 15′ x 15′ room by a minimum of 10 degrees and which could save you up to $45 a month in heating.  Watch the video and then read the tutorial below.

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Tags: DIY

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Author: John Giffard and Mark Lewin

The highly flexible Four-Channel PWM Controller is designed around the ATmega16L microcontroller. It has an RS-232 serial interface for computer control, a 12-button keypad interface, four 10-bit analog inputs, and an alphanumeric LCD interface (with backlight control). [source]

Four-Channel PWM Controller - [Download Project] [View Abstract]

Tags: controller, DIY, Electronics, LED, pwm

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Daniel Joliffe has been updating the Freeduino site. One of the exciting changes is that he has free advertising for sites devoted to DIY and open hardware. I am honored to be one of the sites given this opportunity. Featured sites include the main Arduino site, Libelium, Modern Device Company, NKC Electronics, PHAndeson, RepRap, The Shoppe [...] Tags: DIY, Electronics

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Have you ever wondered why the PS button lights up on pictures and ads of the PlayStation 3 Sixaxis controller, but not on your own controller? The fact of the matter is that Sony's original intention was to illuminate the PS button. They had to scrap the idea in the final design of the Sixaxis controller to save production costs and keep the retail price low. After I saw these pictures, I felt like putting a LED under my own PS button. I decided that since I am doing the project, I might as well write instructions on how to do it as well. I tried to include many pictures and make a very descriptive, concise, step by step guide. Please note that the controller is very hard to put back together but if you have enough patience you can do it. Please read all the way through this tutorial before attempting. If you feel at all like you cannot accomplish this modification to your Sixaxis controller, DON'T. I am not responsible for any damage to your Sixaxis controller, expressed or implied, simply because this is a DIY tutorial. USE THIS TUTORIAL AT YOUR OWN RISK! Tags: controller, DIY, LED, PIC

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