There are people making amazing things around the world, are you one of them? Join the 54,893 strong! And check out scores of projects they shared this week after the jump!
Featured Community Project
For the entire month of June, Nikolaus Gradwohl has been working on a series of great projects, including his great RadioPi project for a RasPi and Arduino-based retro car radio. Here’s his piece from Thursday: “Day 27 of 30daysofcreativity – testing the amp module” (read more)
Don’t miss the chance to catch up with great pieces from the community from this past week! Click the link below!
From the Google+ Community
(Note: Google+ login required.)
Bob Beattie shared: “Collected the XY base of my pick and place machine. Quickly attached and aligned a test PCB and gave the mechanism a quick run to get a first impression of the positioning system.” (read more)
Michael Harris shared: “I needed a precise relay board for a project, so I hacked a crystal onto an Art Controller from +Evil Mad Scientist It needed a custom duty-cycle program anyway, so the dip switches will be saved for another project ^_~ ” (read more)
Jason Birch shared: “Raspberry Pi Media Center Handheld Portable and Battery Powered. A full write up for this project can be found here. A media center which can be used on the go, using AA batteries via it’s LCD display and internal audio amplifier. Or can be used at home with a large HDMI or composite video display. It can play video or audio from a playlist, it can also play internet radio stations.” (read more)
Jason Clark shared: “Mobile Storm Telemetry V2, this is what it looks like mostly assembled. The Solar radiation shield will be larger and everything will be white, but functionaly it is correct. The top of the stack is on bearings and all of the sensors are tucked up inside. Humidity, pressure, temperature, wind speed and direction are all fed from this unit over bluetooth to an android tablet that adds GPS and does dew point/humidx calculations. Everything gets dumped out in google earth friendly formats.” (read more)
Mark Miller shared: “Last week I showed off a simple solenoid motor that I had made with some acrylic bits, and over the weekend I added a servo driven clutch assembly as well as a final gearbox to make it capable of actually driving/moving something. I also added servo throttle control, to get a few extra RPM while shifting gears, and engaging/disengaging the gearbox. I am pretty much done with this project, at least for now-So it goes up on my already overflowing shelves of misc…..Until I figure out what to install it into that would be interesting. The servo pushes a spring loaded slotted hub into a mating end and smoothly locks into rotation. It took me a while to get it all figured out, and now looks simple enough. The gearbox has the space to add different ratios by sliding an different idler gear to connect top to bottom shafts(green one is alone for now). Fun project, ate up some time on the weekend and was fun to make.” (read more)
Neil Capper shared: “DIY Lightweight, backpacking Kelly Kettle From a 7up can and a bit of scrap copper. I couldn’t find my blowtorch, so I had to improvise and use my Meths burner to do the soldering… It’s water tight and I think it’s a good proof of concept for a lightweight 1 man DIY Kelly Kettle. An old rolled up “throw in the oven meal” foil baking tray works great as a fire pit for it and I suspect it will also provide an offcut that I can use for a pan stand. All in, it weighs 99g and it fits inside my pan set. ” (read more)
Luca Pietranico shared: “Well, I went to several stores to look for something that could hold my arcade controls up, but there was nothing at any of the stores so I looked around my house and found a perfect cardboard box that gives enough space for the controls. Then I got some scissors and cut holes big enough for the controls to fit. Bought a case for it and plugged it in the raspberry pi.” (read more)
Rifle Creek shared: “Images created using Mandelbrot software from consecutive blowups of a fractal series created by their software… Structurally, pretty efficient use of materials.. basically what designed additive manufacturing can bring to the table. I guess Eiffel had it right on efficiency.” (read more)
Kevin Huang shared: “A medium-term electrical project. A pair of ancient Grundig speakers need an overhaul. Going to replace the individual speaker cones. The internal wiring is the damnedest thing; all of the cones are in series, boosted by a capacitor and some other stack I can’t identify. Anyone have any experience with this? I could use some pointers.” (read more)
Pete Prodoehl shared: “I recently completed (and showed) a series of paintings which started with code. There’s a bunch of info here. And some technical info here. This is just the beginning of a process I plan to explore more in the future.” (read more)
Derek Molloy shared: “I made a short video on my #diy #LED #fishtank light setup to my personal YouTube channel. It uses high-performance Cree LED stars and gives about 3,336 lumen output at a cost of about 40 Watts and $130.” (read more)
Jason Birch shared: “Raspberry Pi LM386 1W Battery Powered Audio Amplifier The full write up for this project can be found here. A low cost, simple, audio amplifier which can be used on a battery powered Raspberry Pi microcomputer. Using an LM386-4 audio amplifier intergrated circuit. The power consumed during silent audio is ~5mA.” (read more)
Community Projects from the Adafruit Blog
Ryan Shaw shared: “A few months ago I had left for a business trip and couldn’t remember if I had closed the garage door. Nearly all of us have done this at one point in our lives. I promised myself this would never happen again, and a new project was spawned!” (read more)
Patrick Schless shared: “I bought an antique telegraph sounder a while back, and I’ve been working on a project that will click out emails from my Etsy store when I get an order. I’ve gone through several generations, and come up with something I really like. What follows is a description of my process for going from concept to finished piece. The code & PCB are open-source, and can be found on my github.” (read more)
Dave Hunt shared: “Pi-Rex — Bark Activated Door Opening System with Raspberry Pi – for more info check out my blog. Done for the laugh, could be done a lot easier with a timer, etc. It was great fun doing it, and my kids showed a real interest in the progress as I was building it.” (read more)
An astonishing thesis project from Matthew Epler, an artist and film historian, shared on RaspberryPi.org: “It’s a Pi-powered, open-source, scalable device for digitising old film stock, complete with the ability to stabilise images (another application for OpenCV) and recapture sound. A good DSLR camera is the most expensive part of the setup, at about $2000; the rest of the equipment comes to $1200. (Matthew is working on getting that figure down below the magic $1000.) Compare that to the $480,000 it would cost you to digitise 50 films on reels at a film lab, or the $175,000 it’d cost you to buy a Kinetta (the nearest commercial equivalent device) and a whole world of possibilities opens up. Film stock, be it celluloid, acetate or nitrate based, is not stable, and being able to record and save our film heritage is a pressing concern. We’ve already lost more than 90% of all silent movies, and around 50% of the films with audio made before 1950.” (read more)
Ethan wrote in: “A few months ago I stumbled on the Freefly MOVI (video above) that uses active vibration reduction to stabilize cinema cameras by using an IMU to measure camera shake and actuate a gimbal to cancel out the movement (video in article). I realized this was the same technology that multicopter pilots have been using for years to stabilize aerial cameras, but without the $15,000 price tag of the MOVI. This is my attempt to get 90% of the functionality of the MOVI for 5% of the cost.” (read more)
Misha Rabinovich shared on the Adafruit Forums: “In the end this worked out beautifully. We made a sweat battery out of about 150 cells! We evolved the aluminum air battery design to use a sweat-soaked paper towel instead of a vat of sweat. We grouped our cells in secondary groups of 8 to get the voltage up to about 5v, and then put 19 groups in parallel. The first day of the exhibition we had about a whole amp of power coming out! The half life of the power is about a day, mainly because of the evaporation of water from the paper towel. We rehydrated the primary cells and got the battery to power the mintyboost and charge cell phones during the whole weeklong exhibition.” (read more)
Check out this great Conductive Rubber Cord Stretch Sensor piece: “Luisa Pereira and Manuela Donoso collaborated on this musical instrument made of elastics and light. On the first version they used regular elastics coated with conductive ink and on the final version opted for stretch sensitive rubber to create the project’s sensors.” (read more)
RoboTube — a Robotic MIT Admissions Tube: “When I received my admission letter from MIT, it came coupled with an invitation to “hack” the shiny silver shipping tube the letter came in. I decided there was no better way to do this than by building a robot. And from that moment on, RoboTube was born. I wanted to turn to tube into a robot that could roam around and avoid obstacles — a relatively simple task — but I wanted it to be able to transform itself into a robot a collapse back into it’s normal form factor, a regular old MIT admissions tube. The robot uses a servo to open and close, two 100:1 gearmotors to drive, an Arduino Uno to think, an L293D chip for motor control, two 9V batteries and asome regulators for power, and a long range Sharp GP2Y0A02YK0F infrared rangefinder to see.” (read more)
Designer Todd Blatt shared: “I used my Google Glass today to capture photos hands-free at the Walters Art Museum in Baltimore. Then the photos were sent to Autodesk’s 123D Catch, and assembled into a mesh, and cleaned up in Meshmixer. Download yourself a copy of the model online here.” (read more)
Bill Porter shared his LED Tetris Tie: “The first iteration of this project went from initial idea to working prototype in about 4 hours, a new record for myself and a testament to the power of open software/hardware. I had been teaching at the FSU STEM Camp all week with my usual geek attire (8-bit tie, PCB tie, LED Lab coat) and the kids asked me what ‘outrageously cool’ thing I was gonna wear on the last day. The problem was I had nothing left in my closet and feared I would let them down. So when I went home exhausted that night (it’s tough teaching over 100 8th graders to solder!) and sat down at the work bench trying to decide what I could do in a night. Inspired by Adafruit’s Amplie-Tie, this is what I came up with.” (read more)
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