Yearly Archives: 2012

USB Mobile Phone Charger Using the L7805 Voltage Regulator

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I have a really big problem: my phone needs to be on all day, or at least for 8-10 hours. I own a really old Android phone, and its battery only lasts a few hours at most now. You may be wondering why I don’t just get a new battery and solve all my problems. I have tried three times, and none of the so called “compatible” ones work, but I have another one on the way. In the meantime, I was left with no choice other than to come

Setting Up An External Crystal Clock Source (with Fuse Bits) for AVR ATMega Microcontrollers

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Hi everyone, Recently, I came across the need to utilize an external clock source for my ATMega microcontroller. I was initially under the impression that it would be a relatively daunting task after reading about the mounds of bricked AVRs which had fallen into the unforgiving grip of incorrectly set fuse bytes. I didn’t find any tutorials geared specifically towards addressing this subject, suitable for beginners. Fortunately my experience wasn’t bad at all, and the main reason for that (I suspect) is that I did a lot of research and

Capacitive Touch Sensing Game Controller & Processing Game

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I really like my phone because of the way I can seamlessly interact with its touch screen – among many other things. Most touch screens nowadays utilize capacitive touch sensing technology (which I’ll explain later), so this project is my little way of exploring this amazing technology at a very rudimentary level. As you’ll soon find out, my project ended up going much further than I had initially anticipated, and resulted in the creation of a homemade video game which I played with a homemade controller and (you guessed it)

Transmitting Audio Wirelessly Through Light

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I love listening to, and playing music. I also enjoy playing with lasers, and using wireless technology! Why not combine these geeky interests to make my own wireless audio transmitter? You can wirelessly transmit music/data using all sorts of other technologies, but this project will utilize a portion of the visible light spectrum through a laser. This is a perfect project for kids wanting to clinch a science fair ribbon too. Wow the judges by using a laser pointer to transmit your favorite song from across the hall! I ran

DIY USB Solar Charger Tutorial (Wallet Size!)

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Hi everyone, I’ve got a quick, easy, and fun tutorial for you! I’ll show you how to make your very own solar charger for your mobile devices to charge them wherever you find a bright light source and no power outlet. Yep, it’ll work everywhere; from the beach, all the way to the Moon (not the dark side unfortunately). Needless to say, harnessing the power of the sun/photons is not a new concept. Even used to power Vanguard 1 way back in 1958, the sun provides enough energy every hour

Radio Controlled Parachute Drop

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Ever since I developed a passion for scratch building radio controlled airplanes about a year ago, I have been very eager to design a system to deploy parachutes and other fun payloads (I’ll keep those as surprises for future posts). Radio Controlled Parachute Drop from Treehouse Projects on Vimeo. I recently built an electric 41″ Cessna 185 out of foam, adapted from Mark’s plans over at www.budgetrc.com. He’s been a scratch builder since 1977 (well before I was even born), so he’s got a few more years of experience under

HC-SR04 Ultrasonic Ping Sensor Arduino Tutorial

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Hi everyone, Just the word ultrasonic sounds cool to me! It makes me think of something fast, hi-tech, and hard to understand. Fact is, I think I’m right about everything but the hard to understand part, which I realized after purchasing the HC-SR04 ultrasonic distance sensor and hooking it up for a test run. The uncanny resemblance to Wall-E just makes it even better. I can think of a whole list of applications of this technology for my future projects; particularly for autonomous robots and UAVs (Unmanned Air Vehicles). Hopefully

Accelerometer Controlled Robotic Hand

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This is my first post on Treehouse Projects, and I hope it will be the beginning of a lot more to come in the future. Prosthetic body parts have always intrigued me. The research I have witnessed and read about in the field has always inspired me to try and find solutions to assist people with disabilities. By no means is this project an innovative step in that direction, but it is a first for me, and I hope future versions will be much more practical and potentially useful from