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  • Intro to Laser Cutting — New dates

    There are another three dates for the Introduction to Laser Cutting course: Saturday 7th December 2013 Saturday 18th January 2014 Saturday 15th February 2014 I had 4 people for the first course who all went away very happy with the new items, knowledge and skill that they’d learned. Only £69.55...

  • TLRN — A Wire-Supported Hanging Delta Robot

    Here’s a little teaser of a current project that I’ve been working on. TLRN at OGGCamp If you take a delta robot and replace the parallel linkages with the a pair of parallel wires wound over motor pulleys then you get a robot that can scale up to giant size....

  • Shrimp-on-a-shield

    I’ve been describing Arduinos as a “gateway microcontroller” a lot while introducing them to new users. They’re great to get started with, you build your first project include your first Arduino board in it, and then you have to go out and buy another one. And then you’re hooked on...

  • CoffeeBot monitoring with Arduino

    So, after I described using an instrumentation amplifier to take strain gauge readings using an Arduino, what was all that theory for? To measure the amount of coffee in the DoES Liverpool coffee pot from the next room over of course. A “Coffee Bot” if you like! Reading the contents...

  • Intro to Laser Cutting Course, September 2013

    As part of my role as DoES Liverpool’s technician, I get to give introductions to new users to get them started with using DoES’s laser cutter. However, because it’s only an introduction I only get to spend an hour or so going over the basics when I’d like to spend...

  • Reading Strain Gauge Scales with Arduino

    One of the smaller projects that I took to Maker Faire last month was a strain gauge reading circuit for Arduino. While the Arduino in the demo setup was actually redundant (the voltage input from the scales was output to a 5V dial gauge directly) there was also a circuit...

  • Perceptive Radio Build Pics

    I’m sure you’ve seen the write up from Mudlark and the blog post from BBC R&D; about their new Perceptive Radio that localises content and adjusts playback characteristics depending on listener interaction. I was approached by MCQN Ltd as the electronics part of the radio was nearing completion and asked...

  • Maker Faire UK 2013

    This coming weekend, Maker Faire UK is at the Centre for Life in Newcastle. I’ll be exhibiting as part of the DoES Liverpool stall this year. While I initially started going to DoES Liverpool, it was to get some hands-on experience with running a laser cutter, which would improve the...

  • So What's a Practical Laser-Cut Clip Size?

    I’ve previously shown for laser-cut elastic-clips for comb joints what the equations are for calculating maximum bending stress and operating force, using the distance that the clip has to deflect in use as the starting point. I also explained how a tapering clip profile was preferable to a straight one....

  • Laser-Cut Elastic-Clipped Comb-Joints

    Comb-Jointed Box in Clear Acrylic. By Pete Prodoehl. Licenced under Creative Commons BY-NC-SA During a makerday, I saw a someone struggling to put together a Raspberry Pi box that they’d laser cut, and were trying to hold together: two pieces of acrylic to make the joint, and the Raspberry Pi...

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