• Operational Amplifier Questions

    Updated: 2009-09-30 15:42:32
    Hey everyone, I have a few questions regarding op-amps and wondered if you could clarify them for me. According to the picture in the attachment,...

  • Another ATX to bench power supply question?

    Updated: 2009-09-30 15:27:47
    Hi everyone, I'm very inexperienced with electronics (I'm currently in high school physics and we haven't gotten up to the electricity unit yet, so I...

  • LED Project

    Updated: 2009-09-30 15:10:05
    Hey Guys, I understand that LED projects are popular, and that you get a lot of questions regarding them so I apologize if what I'm asking has been...

  • Dude, Where’s the Switch?

    Updated: 2009-09-30 14:48:48
    All tools. All the time. Your source for news, information, and reviews of hand tools, power tools, and tools of all kinds.

  • Dealmonger Update: Revolving Leather Punch

    Updated: 2009-09-30 14:04:15
    All tools. All the time. Your source for news, information, and reviews of hand tools, power tools, and tools of all kinds.

  • DIY Street View camera

    Updated: 2009-09-30 13:00:00
    : : Make Technology on Your Time RSS Blog Make Magazine Videos Podcasts Projects Forum Community Maker Shed Store How-To : Make a Proponomicon Main Chaos Communication Congress accepting submissions DIY Street View camera As part of a course at the United States Military Academy at West Point maker Roy D . Ragsdale developed a prototype Street View-like camera using a laptop , 300 in off-the-shelf components , and open source software . A Python script captures eight 1280x1024px JPEG files that are then stitched together and uploaded to Google . Earth Construction was straightforward . On a flat octagonal heavy-cardboard base , I glued small posts for the cameras' clips to latch onto . I aligned each unit and then placed the USB hubs and the GPS receiver in the middle . I secured the cables with Velcro and sandwiched everything with another piece of cardboard . The whole thing's the size of a small pizza box , weighing less than 1 kilogram . Excluding the notebook a 2-gigahertz machine with 512 megabytes of RAM running Ubuntu Linux the hardware cost about 300. thanks , Erico Posted by Adam Flaherty Sep 30, 2009 04:00 AM DIY Projects GPS Mobile Photography Permalink Comments 1 Email

  • Arduino noise box synth

    Updated: 2009-09-30 10:00:00
    : : Make Technology on Your Time RSS Blog Make Magazine Videos Podcasts Projects Forum Community Maker Shed Store Designing a better world Main Electronic Temperature-Controlled Relay Arduino noise box synth Tim sent us a link to his Arduino noise box synth that he built . It has 16 programmable sequences , 4 waveforms , a noise generator and a random feature . Check out the link for a lot more information , including the source . code This project is an Arduino based step sequencer , synthesizer and sound effects box . It was constructed a year ago as a third birthday present , and has recently come back to me for some refurbishment' fresh batteries and some glue to fix LEDs that have been pushed into the . box In the Maker : Shed Make : Arduino Posted by Marc de Vinck Sep 30, 2009 01:00 AM Arduino Music Permalink Comments 0 Email This Digg this Recent Entries How Round Is Your Circle Chaos Communication Congress accepting submissions DIY Street View camera How-To : Make a Proponomicon Electronic Temperature-Controlled Relay Arduino noise box synth Designing a better world Square bike Amazing pancake sorting robot Beautiful generative art made with Roombas Leave a comment Name

  • Square bike

    Updated: 2009-09-30 06:34:33
    : : Make Technology on Your Time RSS Blog Make Magazine Videos Podcasts Projects Forum Community Maker Shed Store Amazing pancake sorting robot Main Designing a better world Square bike Square bike at the Math Midway more photos Posted by Phillip Torrone Sep 29, 2009 09:34 PM Bicycles Permalink Comments 2 Email This Digg this Recent Entries How Round Is Your Circle Chaos Communication Congress accepting submissions DIY Street View camera How-To : Make a Proponomicon Electronic Temperature-Controlled Relay Arduino noise box synth Designing a better world Square bike Amazing pancake sorting robot Beautiful generative art made with Roombas Comments Oldest comments listed . first Posted by : Chris W on September 30, 2009 at 3:20 AM I would call this a tricycle . Has anyone built a square wheel bicycle At least the tires can't get any . flatter Reply to this comment Posted by : Shane Beall on September 30, 2009 at 8:24 AM With projects like this , mankind will soon make the Island of Misfit Toys a thing of the . past Sweet . build Reply to this comment Leave a comment Name Email Address Title Comments Subscribe to MAKE Magazine Subscribe today , save 42 and get web access to MAKE free .

  • Amazing pancake sorting robot

    Updated: 2009-09-30 05:00:56
    : : Make Technology on Your Time RSS Blog Make Magazine Videos Podcasts Projects Forum Community Maker Shed Store Beautiful generative art made with Roombas Main Square bike Amazing pancake sorting robot Wow This robot sorts over 400 pancakes per minute . Right around 1:15 it gets amazing , it seems like it's sped up , but they need to slow it down in the video to show it off via jk Posted by Phillip Torrone Sep 29, 2009 08:00 PM Robotics Permalink Comments 12 Email This Digg this Recent Entries How Round Is Your Circle Chaos Communication Congress accepting submissions DIY Street View camera How-To : Make a Proponomicon Electronic Temperature-Controlled Relay Arduino noise box synth Designing a better world Square bike Amazing pancake sorting robot Beautiful generative art made with Roombas Comments Oldest comments listed . first Posted by : Steve Hoefer on September 29, 2009 at 9:35 PM Amazing is right I especially like the physical buffer where it can keep pancakes until they're needed and how the contrasting blue belt helps the object recognition . It's like a pick place machine for . food Though the words room temperature pancakes makes me squirm and the idea of factory made

  • Lots of new content in the Science Room!

    Updated: 2009-09-29 23:30:00
    : : Make Technology on Your Time RSS Blog Make Magazine Videos Podcasts Projects Forum Community Maker Shed Store Crawling wooden automaton Main SPARK Project 2, Post 3 Lots of new content in the Science Room We've just added a bunch of new content to the Make : Science Room In General , we added Bob's brief on how to set up and keep a proper lab notebook , in Chemistry , we added Section 12 on the fine art of studying reaction rates in chemical processes , called chemical kinetics , and in Forensics , we take a look , a VERY close look , at hair and fiber , the bane of violent perps . everywhere You learn a lot of interesting stuff working with these labs ah . or editing them For instance , did you know the different classifications for the types of hair found on a dog Me : neither Animal hairs are more differentiated by somatic region and purpose than human hair . Animal hairs are classified as members of four broad types : Guard hairs form the outer coat of the animal , shed water , and protect the inner hair and skin Fur or wool hairs form the inner coat and provide insulation Tactile hairs , also called whiskers , are found on the head the snout or ears where they provide

  • Research exemption - calm down, it's ok to "make" something for fun that's patented

    Updated: 2009-09-29 20:38:25
    : , : Make Technology on Your Time RSS Blog Make Magazine Videos Podcasts Projects Forum Community Maker Shed Store Theremin cat Main Buy wholesale Cthulhu and save Research exemption calm down , it's ok to make something for fun that's patented After releasing the Open source Homeland Security non-lethal weapon The Do-it-yourself handheld LED-based Incapacitator a few folks around the web emailed or posted saying you can't build that for yourself , or even for fun , it's patented This comes up once and awhile in the world of making things , perhaps it's a good conversation starter- here's a snip from a wikipedia article on Research exemption In patent law , the research exemption or safe harbour exemption is an exemption to the rights conferred by patents and from a previous case where this seems to have been tested , the court(s said experimental use defense for amusement , to satisfy idle curiosity , or for strictly philosophical inquiry . We're not lawyers , this is not legal advice that said , this seems to makes sense . Imagine drug companies needing to wait until a patent expires to figure out if they can make a generic drug . or imagine everyone sitting on their hands not

  • Dealmonger: Grozing Pliers

    Updated: 2009-09-29 15:51:21
    All tools. All the time. Your source for news, information, and reviews of hand tools, power tools, and tools of all kinds.

  • Material Source: Maynard’s

    Updated: 2009-09-29 15:34:05
    All tools. All the time. Your source for news, information, and reviews of hand tools, power tools, and tools of all kinds.

  • TXT a beaver - Amphibious architecture

    Updated: 2009-09-29 05:00:20
    : : Make Technology on Your Time RSS Blog Make Magazine Videos Podcasts Projects Forum Community Maker Shed Store Computer grows tumor , hopefully benign Main 3D printable business card case TXT a beaver Amphibious architecture Amphibious architecture I TXTed a beaver in the East River , neat . You can too , just text EastRiver or BronxRiver to 41411 Amphibious Architecture is a visual interface floating on the water’s surface , a veritable looking glass into the aquatic ecosystem . This manufactured point of connection submerges ubiquitous computing into the one element that covers 90 of the Earth’s inhabitable volume and which envelops New York City but remains under-explored and under-engaged . Installed at two sites along the East and the Bronx Rivers , this project is a network of floating interactive buoys housing a range of sensors below water and an array of light emitting diodes LEDs above water . The sensors monitor water quality , the presence of fish , and human interest in the river’s ecosystem , while the lights respond to the sensors , creating feedback loops between humans , fish in their shared environment . Additionally an SMS interface allows homo-citizens to

  • ResQMe Again

    Updated: 2009-09-28 16:29:50
    All tools. All the time. Your source for news, information, and reviews of hand tools, power tools, and tools of all kinds.

  • Starrett’s New Inspection Scope

    Updated: 2009-09-28 15:06:37
    All tools. All the time. Your source for news, information, and reviews of hand tools, power tools, and tools of all kinds.

  • Neon Voice of Saturn Family

    Updated: 2009-09-28 08:28:00
    Nate got the whole family of voice of saturns (synth, seq, modulator, filter) and decided to color them up. Here's some musings from his lair.

  • Post Number 900 to With Varying Frequency – Amateur Radio Ponderings

    Updated: 2009-09-27 02:31:32
    It is a sort of nonsense milestone, but in the fashion that WordPress counts Blog Posts, this is my 900th update to With Varying Frequency – Amateur Radio Ponderings. For the most part my original project goals are continuing, a chance to share what others have been kind enough to teach me about Amateur Radio and [...]

  • Guest Post: AE5JU – I Never Knew the Guy

    Updated: 2009-09-25 15:21:57
    I’d asked my friend Paul AE5JU if I could share some of his ham experiences, and he’d has graciously agreed. Paul AE5JU went from a SWL to Amateur Extra in a single test session, and has kept a-going! Here is a recent recounting of being recognized as a Ham: I’ve had my picture in the paper several times [...]

  • My Extruder Doesn't Work. What Can I Do?

    Updated: 2009-09-25 01:35:00
    : : . RepRap : Blog Blog for the RepRap project at www.reprap.org a project to create an open-source self-copying 3D . printer Friday , September 25, 2009 My Extruder Doesn't Work . What Can I Do this is probably one of the most common cries of anguish heard from new RepRap owners . The picture on the right shows two common modes of extruder failure . In each case , the symptom is that the filament cannot be pushed through the extruder , or requires enough force to damage the filament even when the nozzle has been removed and the barrel is hot enough for molten plastic to dribble out of . it To find out what is going on , take the cooled extruder apart and look at the filament inside . If you can't get the filament out of the PTFE or PEEK spacer , the chances are that your spacer has got hot and the filament has bulged inside it . Use hose clamps or a metal sheath to stop the spacer from deforming . You will probably need a new . one If you see a blob of plastic sitting directly on top of the heater barrel , you have a gap . Any space between the top of the barrel and the end of the hole that it fits into will accumulate plastic . This plastic will not all be molten , and will

  • Electronics Design Contest

    Updated: 2009-09-24 07:16:23
    Join electronics design contest and win prizes. Test your hardware and software skills against the best designers from the rest of the world.

  • Being Technically Right Does Matter – Dealing with Incorrect Amateur Radio Emotionalism

    Updated: 2009-09-23 16:02:23
    Specially in the Club Setting, how many of use have had to deal with “I feel” and other emotional rational masquerading as Technical Decision Making? We once even had a (now ex-)Board Member go off on an adult tantrum with an “I don’t care what …. because I FEEL that it is …..” Needless to [...]

  • Mendel Apollo

    Updated: 2009-09-17 21:35:00
    : : RepRap : Blog Blog for the RepRap project at www.reprap.org a project to create an open-source self-copying 3D . printer Thursday , September 17, 2009 Mendel Apollo While preparing the Mendel files , we’re all building prototype machines in the Bath Uni RepRap lab to get a mini factory up and running . Whilst the other guys are building three standard issue Mendels , I’m going to scratch an itch I’ve had for a long time : it’s that how big can this thing go itch My single motivation is to have a large enough build volume to manufacture all of the printed parts in one single shot . This , in my mind , makes for a much more independent self-manufacturing . machine I laid up what a single shot build might look like and found the area for printing all the parts , with enough spare room for evolutions , to be 440mm square marked with a blue line in pic below That’s 5 times bigger than the standard Mendel build . area I’m going for a build area of 350 mm x 550 mm . Whilst this achieves the same area as 440mm square , it yields a more manageable footprint out of the Mendel architecture and caters for the fact that most print jobs are rectangular , not square . I modelled the variant

  • Software Freedom Day 2009

    Updated: 2009-09-14 23:03:00
    RepRap relies heavily on free software to drive the RepRap itself, create the models of the components, design the circuitry, build the software, and run the websites. Software Freedom Day is about supporting and raising awareness of Free and Open software around the world, so find out your nearest local event and get down there to support all this wonderful stuff. Oh, and show off your RepRap or RepStrap :)I'll be at events in Albany and Auckland in New Zealand, with even bigger events being held in our Capital, Wellington.Vik :v)

  • Calibrating the CupCake Part 1: Nozzle Temperature

    Updated: 2009-09-12 03:48:23
    Last Saturday I went shopping for lunch with a tape measure. Delicious Spam™, fried up nice and crisp and served with Grannie’s “homemade” [what exactly does that word mean?] mustard. Yummmm! The behavior of my CupCake during the first week of testing and parts-building had made me think that the nozzle was actually colder than the [...]

  • Local Mancorad W9DK Club News – September 2009

    Updated: 2009-09-11 20:41:28
    Have been rather busy and very involved with work, family and a little bit of Radio. A few nights I was able to make the 1.895 Everyday 160m Net at 00:00z and had caught a very small amount of DX on mostly 20m. Our local club has several very good things going on: - A Hamcram is in [...]

  • Darwin vs Wedge, the numbers

    Updated: 2009-09-09 14:31:00
    : : , RepRap : Blog Blog for the RepRap project at www.reprap.org a project to create an open-source self-copying 3D . printer Wednesday , September 09, 2009 Darwin vs Wedge , the numbers I've just finished a parts list analysis on the two models : Darwin 1.0.6 left and the Wedge prototype right Here's some : graphs So to very briefly summarise , with the use of bearings the wedge attracts a higher proportion of fasteners . I consider this a small price to pay for much smoother running . The volume of RP parts is the same , as is the area of sheet used in the construction , however the number of structural components is significantly reduced . The assembly has been simplified using only a third the number of different bolt types , and the total assembly volume has halved whilst maintaining a similar build . volume Here's an analysis of the RP parts in the Wedge design nod to Forrest for the suggestion Clearly we could save some volume by optimising the vertices etc etc posted by eD 2:31 PM Comments : great numbers , i think wedge mendel will be my first reprap machine D thanks for your works posted by kristianpaul September 09, 2009 7:05 PM Great numbers Thanks , eD posted by

  • CupCake First Prints

    Updated: 2009-09-04 04:01:08
    This post is for anyone thinking about a CupCake and wondering what the extrusion is really like. The rest of y’all, go away for a bit. First extrusion, no CAM happening, just heating up the extruder and running filament. Here the extruded pile from a different angle. It’s a fairly clean thread. It hardens [...]

  • Repairing Mr. Coffee

    Updated: 2009-09-04 02:14:32
    A few weeks ago, my wife’s coffeemaker quit working, and this became A Problem. Not too long after that (or should I say, slightly too long after that) I opened it up, found I couldn’t easily fix what was wrong, and hacked it to bypass the broken part. The symptom was that it wouldn’t power [...]

  • Programming the CupCake Motherboard and Extruder

    Updated: 2009-09-03 03:45:55
    Because the (early batch) CupCake circuit boards are assembled by the customer (me), they’re unprogrammed and the customer (me) has to use an in-system programmer (ISP) to burn the bootloader and then an FTDI USB-serial cable and Arduino development environment to program the firmware. Happily, the prerelease kit included both a USBtinyISP and the [...]

  • CupCake Pilot Assembly

    Updated: 2009-09-03 02:15:15
    As of a weekend ago, we are assembled! There are changes to be made, but they’ll clean up along the way. Notes from the process: All of the cables will get proper cable management. I won’t show closer pictures of them until they do. The glued-up plywood idler pulleys from the early CupCake batches — besides [...]

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