tag:blogger.com,1999:blog-61755273797673115552024-03-13T18:05:08.202+00:00Marcel Lenormandblog of a tool-user, maker and tinkerer with a heart to see appropriate technology change the lives of the other 95%Unknownnoreply@blogger.comBlogger30125tag:blogger.com,1999:blog-6175527379767311555.post-68309227425405081872014-06-13T09:40:00.000+01:002014-06-13T09:40:11.490+01:00Finally back to my blog!So, after what seems like (is) an eternity, I've remembered that I have a blog!<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEitJ9Z1sLUq0465u7-VQeHjs07nlF0JDIuncA8rhHNSLiJPhdwz5kGexFHATX-ZYFjoe7bbA4RhJtAUWy0SizkaQwPqrqVF_GMx4hFbH7is1eIJftE3t8lkbOLQAvFSisa1-KDL7HOgVOHR/s1600/Kinect+Sensor.jpg" imageanchor="1" style="clear: right; float: right; margin-bottom: 1em; margin-left: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEitJ9Z1sLUq0465u7-VQeHjs07nlF0JDIuncA8rhHNSLiJPhdwz5kGexFHATX-ZYFjoe7bbA4RhJtAUWy0SizkaQwPqrqVF_GMx4hFbH7is1eIJftE3t8lkbOLQAvFSisa1-KDL7HOgVOHR/s1600/Kinect+Sensor.jpg" height="200" width="200" /></a>I'm just a few days away from embarking on an incredible arts research project with a professional dancer from the UK, Darren Pritchard. (I say 'embarking' but it feels more like just 'barking'!) We're going to be locking ourselves away in darkened room for 6 weeks to explore what can be done with dance and the Kinect sensor.<br />
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The project travels under the title of Body of Light. This is phase 1. A second phase later in the year will take place in Manchester, UK, and develop what we have created into a performance-ready…er…thing.<br />
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A little while back I hooked up the Kinect sensor to my laptop and gave it a test. It sounds simpler than it was. This is what I look like as a depth map…<br />
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Exciting times ahead!</div>
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Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-6175527379767311555.post-78138222917698248442013-09-08T12:52:00.001+01:002013-09-08T12:52:07.213+01:00LED light fitting recoveryWell pleased that last night I managed to put together 3 working LED lights from a dozen+ 'dead' LED lights. <div><br></div><div>Most of them had dead power supplies (seen here wrapped in yellow tape) but 3 had defective LEDs. I simply swapped, soldered and heat-shrunk the various bits into 3 working lights. They're worth something like £10 each so it was time well spent!</div><div><br><div><div class="separator" style="clear: both;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiwyNwybTmIdcBPd_nzc1egMHu5nl2xx-F2l5dJoAhvIItXJmw_EYf-joawtx162V9ivtj4b7D14E9bwxbxY_Oz2ETHArxfzzEK6asmPDq2B6RoXLb1XevpIflYPUhuzJLv9shF348exmsr/s640/blogger-image--69891722.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiwyNwybTmIdcBPd_nzc1egMHu5nl2xx-F2l5dJoAhvIItXJmw_EYf-joawtx162V9ivtj4b7D14E9bwxbxY_Oz2ETHArxfzzEK6asmPDq2B6RoXLb1XevpIflYPUhuzJLv9shF348exmsr/s640/blogger-image--69891722.jpg"></a></div></div></div>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-6175527379767311555.post-7788118650241740562013-06-22T15:50:00.000+01:002013-06-22T15:51:48.487+01:00Liberation Day FilmSo proud to have worked on his film. The question posed was "What does Liberation mean to you today?" — we met lots of wonderful people in the process…<br />
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<iframe allowfullscreen="" frameborder="0" height="281" mozallowfullscreen="" src="http://player.vimeo.com/video/66242753" webkitallowfullscreen="" width="500"></iframe></div>
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<a href="http://vimeo.com/66242753">"What does Liberation mean to you today?"</a> from <a href="http://vimeo.com/gsyarts">Guernsey Arts Commission</a> on <a href="http://vimeo.com/">Vimeo</a>.</div>
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Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-6175527379767311555.post-34494434935043162082013-06-19T16:37:00.001+01:002013-06-22T15:39:55.893+01:00Arts trail launched<div class="separator" style="clear: both; text-align: center;">
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Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-6175527379767311555.post-12584369345565221142013-06-08T12:46:00.000+01:002013-06-08T12:46:27.717+01:00Bee amazed<div class="separator" style="clear: both; text-align: center;">
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I found a dead bee (an X.B.) on the window sill. I'm fairly sure it's a ground bee rather than a honey bee.</div>
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<tr><td><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjdqzhsJp-m2bhAM9MOTIOwxd-VRsGzdIaVRH7K0LLZswgGBvgjBP6wuUZS8GA5PXHMOPLW3zhBKBGJMR2RKrAnKjb4AnGAvw3EKftGFFKTeM-T_NR2OaWvChNzVkumX7p7ksVmopj8F3qT/s1600/1306081210_4.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjdqzhsJp-m2bhAM9MOTIOwxd-VRsGzdIaVRH7K0LLZswgGBvgjBP6wuUZS8GA5PXHMOPLW3zhBKBGJMR2RKrAnKjb4AnGAvw3EKftGFFKTeM-T_NR2OaWvChNzVkumX7p7ksVmopj8F3qT/s320/1306081210_4.jpg" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="font-size: 13px;">Furry little fella</td></tr>
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<tr><td><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgp3TGyxoaumiKyuxauzJMWoHDBnrybwvXWl3EJ3pH19ebJZawebbEKQg2O7RP4Yke5Pwglq2GTV18P6R8IDBLMk8L5RuDwWvNFOqd7KEnm689y7TO8HnBaDzLtFAdSwuVCOcc2lGf4iblz/s1600/1306081135_2.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgp3TGyxoaumiKyuxauzJMWoHDBnrybwvXWl3EJ3pH19ebJZawebbEKQg2O7RP4Yke5Pwglq2GTV18P6R8IDBLMk8L5RuDwWvNFOqd7KEnm689y7TO8HnBaDzLtFAdSwuVCOcc2lGf4iblz/s320/1306081135_2.jpg" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="font-size: 13px;">Have you ever seen a bee's foot?</td></tr>
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<tr><td class="tr-caption" style="font-size: 13px;">Wing</td></tr>
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<tr><td class="tr-caption" style="font-size: 13px;">Mouth</td></tr>
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<tr><td><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjXzG1Bbs5WZ73HsSIEYgkJowAOyQYlq1khl1PPzsMfLXvgl6Cph6ouPoCwrAE-ofjZINVKJfHAD3RqSotutaAjJ8wbUILt6ZJiBD70XaJ7QZDxja16mH-dMZNLLSyPAY9dE8RWxbVG7ivI/s1600/1306081212_5.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjXzG1Bbs5WZ73HsSIEYgkJowAOyQYlq1khl1PPzsMfLXvgl6Cph6ouPoCwrAE-ofjZINVKJfHAD3RqSotutaAjJ8wbUILt6ZJiBD70XaJ7QZDxja16mH-dMZNLLSyPAY9dE8RWxbVG7ivI/s320/1306081212_5.jpg" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="font-size: 13px;">Da beez kneez</td></tr>
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Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-6175527379767311555.post-2596446665683707142013-05-16T13:00:00.001+01:002013-05-16T13:07:33.698+01:00"What does Liberation mean to you today?"I've just completed a stop motion animation project involving the Guernsey public. On May 9th, we were celebrating 68 years since the end of the German occupation of Guernsey. We wanted to know what that means to people in 2013.<br />
The responses were thought provoking — both amusing and sobering. I can't watch it without smiling from ear-to-ear — partly because of the responses, but mostly from the memory of meeting so many wonderful people that day.<br />
To the old and young, Guerns, Brits, French, German, Polish, Dutch and American/German, echoing what is said at the end of the video; "Thank you, everyone!"<br />
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<iframe allowfullscreen="" frameborder="0" height="335" mozallowfullscreen="" src="http://player.vimeo.com/video/66242753" webkitallowfullscreen="" width="600"></iframe> </div>
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<a href="http://vimeo.com/66242753">"What does Liberation mean to you today?"</a> from <a href="http://vimeo.com/gsyarts">Guernsey Arts Commission</a> on <a href="http://vimeo.com/">Vimeo</a>.</div>
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Click to view these pics full size.</div>
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<span style="color: #999999; font-size: x-small;">Photos by Guernsey Arts Commission.</span></div>
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Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-6175527379767311555.post-10355112359005583682013-03-08T23:11:00.002+00:002013-03-08T23:19:02.720+00:00Hermit Crab goes walk-abouts<div class="separator" style="clear: both; text-align: left;">
One of the recent additions to our little marine aquarium was a hermit crab. He turned up in a chocolate brown periwinkle shell. A couple of days later he had upgraded to a dogwhelk shell. </div>
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The other day I spotted him, out and about and very active – which is unusual. I snapped some video in action and it was so fascinating that I just kept rolling.</div>
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The camera is a but shaky — couldn't be helped. Focus isn't great — I just wish the camera could get closer.</div>
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<iframe allowfullscreen='allowfullscreen' webkitallowfullscreen='webkitallowfullscreen' mozallowfullscreen='mozallowfullscreen' width='680' height='400' src='https://www.youtube.com/embed/EOfgCJWPwGI?feature=player_embedded' frameborder='0'></iframe></div>
Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-6175527379767311555.post-91620358095240911332013-03-03T00:51:00.001+00:002013-03-03T00:51:27.999+00:00Stop Motion<div class="separator" style="clear: both; text-align: left;">
Had a first play with stop motion animation the other day with JP. We had a thoroughly good time together. Seeing an otherwise inanimate object come to life is quite enchanting. </div>
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<iframe allowfullscreen='allowfullscreen' webkitallowfullscreen='webkitallowfullscreen' mozallowfullscreen='mozallowfullscreen' width='600' height='400' src='https://www.youtube.com/embed/GIHBlSH5-cU?feature=player_embedded' frameborder='0'></iframe></div>
<br />Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-6175527379767311555.post-60361936808409828752013-01-28T13:58:00.001+00:002013-01-28T13:58:45.404+00:00Maker School: Ping-Pong Ball Stomp Cannon<a href="http://makerschool.blogspot.com/2013/01/ping-pong-ball-stomp-cannon.html?spref=bl">Maker School: Ping-Pong Ball Stomp Cannon</a>: …you saw it here first!Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-6175527379767311555.post-38401924677670729422012-12-15T14:29:00.001+00:002012-12-20T00:14:58.051+00:00Chancre Crab Eats Gooseneck Barnacle<div style="text-align: left;">
Our Chancre Crab (aka. Brown Crab, Edible Crab, Pastie Crab) enjoyed a feast recently. We had found a washed up fish-box that was covered in Gooseneck Barnacles. I scraped a few off the plastic box and strung them up our little marine aquarium. They were fascinating to watch — sieving the water for food then retracting into their shells to eat. That was until Chancre got wise to them and decided to get piece of the action for himself — even moving rocks so he could reach them!</div>
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Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-6175527379767311555.post-25484623789904544212012-09-25T00:55:00.005+01:002012-09-25T00:57:34.541+01:00We had a campfire-cooked lunch on the beach<div class="separator" style="clear: both; text-align: center;">
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Unknownnoreply@blogger.com1tag:blogger.com,1999:blog-6175527379767311555.post-66334296466772132982012-09-20T15:24:00.000+01:002012-09-20T15:25:03.091+01:00Lack of activityApologies for the lack of activity here. I've been focussed on building up my new venture: Maker School — putting <i>real</i> tools in the hands of kids and working on <i>real</i> projects.<div><br></div><div>You can see more at : <a href="http://www.makerschool.net">www.makerschool.net</a></div>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-6175527379767311555.post-88470272577309508862012-09-20T15:14:00.001+01:002012-09-20T15:21:19.084+01:00Exploring Flight<div>
Experimenting today with different wing shapes using a compressor blowing down a tube to create a sort of wind tunnel. Kinda.</div>
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Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-6175527379767311555.post-35503737857497618362012-06-15T13:52:00.001+01:002012-06-15T13:52:41.382+01:00Our Marine Aquarium<div style="text-align: center;">
<iframe frameborder="0" height="410" src="http://files.slidemypics.com/app/js/iframe.html?bg_color=1f1f1f&hash=b4458f95e1dd0750591228f97a638738&r=0.657995268702507" width="600"></iframe></div>
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A few pics from our marine aquarium. Will be posting more on this as time goes by. It's very exciting to have a window into the lives of creatures that you usually wouldn't see.</div>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-6175527379767311555.post-65129649027398668712012-05-24T13:46:00.000+01:002012-05-24T13:46:04.867+01:00Can you cook popcorn with a magnifying glass?<div class="separator" style="clear: both; text-align: center;">
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Well, amazingly, the short answer is YES — but, it's all about the method.<br />
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A regular magnifying glass is able to set fire to a popcorn kernel quite easily. This however is not what we want. We need the moisture inside to boil, cook the starch and then burst the shell explosively. <br />
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We used a larger magnifying lens — a flat 'fresnel' book magnifier — and sat the kernels in some cooking oil in a teaspoon. I think the cooking oil is there just to spread the heat around the kernel rather any cunning cooking chemistry. After a while it will start bubbling (some of it's moisture boiling off) then after a while longer, if you're lucky, it'll explode. We managed to get a good few of them to pop but only one made a lovely big popcorn — the others were kinda half-hearted attempts at popping.<br />
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Focussing the sunlight too tightly on the kernel lead to burning. A loose focus on the teaspoon head spread the energy out to a more controllable level.<br />
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After all this discovery we went inside and hit the stove with a saucepan. They all popped in no time. It just goes to show how much energy your stove kicks out!Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-6175527379767311555.post-45544597413535019662012-05-21T12:31:00.000+01:002012-05-21T12:31:28.056+01:00NEW: Photo School3 day course for kids aged 12+ with an interest in art or photography…
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<a href="http://guernseyphotoschool.com/" target="_blank"><img border="0" height="286" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjDhorMNpASLI7hg5aguRM_I_pxAXGu951gZ2500TfNQ7KtvIByAnjRMvvPLLni9ir2hOE8dXT6dJjJnckuMq9IThKXo5O360Ke7rz4BJy9DroSwfULvkF7BMo3tWj_Xo_YlwaXxP0U5oY/s640/Photo+School+Logo.jpg" width="640" /></a></div>
6-8 June 2012<br />
<a href="http://guernseyphotoschool.com/" target="_blank">http://guernseyphotoschool.com/ </a>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-6175527379767311555.post-20284763728545299982011-10-18T23:42:00.000+01:002012-09-20T15:20:17.921+01:00Motor Timer Circuit<div class="separator" style="clear: both; text-align: left;">
I've built a simple little circuit for controlling the run time of a motor. It's based on a 555 timer chip in monostable mode — which means when you press the button, it runs the motor for as long as you set with the knob.</div>
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It's can currently range from ≈ 1sec to ≈ 12secs. Modifying this range is as simple as changing a capacitor or resistor. For example, doubling the size of the capacitor would result in a range of ≈ 2-24secs.<br />
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The idea is to use this on a model aircraft instead of rubber band power - which can be a bit of a faff.<br />
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I'm not sure about the motor yet - it's just been scored from a CD-ROM drive and the power supply here is a 9V battery - which is quite heavy. Happily, the circuit will accept voltages from 2-18V so there's plenty of scope for experimentation without having to alter the circuit.<br />
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I translated the circuit from a breadboard test to a stripboard layout and used Pages on the Mac to draw a template. I then printed and stuck the template onto the stripboard which gives a really nice reference as you're adding components. This diagram is version 2 which ironed out a few layout issues.</div>
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If it actually gets strapped to a model plane… you'll see it here. :)</div>
Unknownnoreply@blogger.com2tag:blogger.com,1999:blog-6175527379767311555.post-73972032931841273382011-09-15T13:38:00.001+01:002012-01-13T17:03:27.345+00:00GRZR Robotic Lawnmower is MobileFor the first time, our robotic lawnmower project has mobility and a modicum of intelligence. Two bump sensors dictate which way the robot should turn on impact with an obstacle. It's still early days.<br />
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<iframe allowfullscreen="" frameborder="0" height="315" src="http://www.youtube.com/embed/bJPprxYBV1M?rel=0" width="420"></iframe><br />
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The robot is powered by 4 AA cells via a boost regulator that gives us a constant 5V. An Arduino does the thinking and drives 2 continuous rotation servos.<br />
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We also did a test today on the blades and motor. Bottom line - it works well when there's not much grass to cut but the tiny motor soon gets bogged down and the blades lose speed. We're going to need a MUCH more powerful motor and that will mean we need to re-think the power source for the whole robot.Unknownnoreply@blogger.com4tag:blogger.com,1999:blog-6175527379767311555.post-60399918815924984922011-06-13T21:06:00.002+01:002012-09-20T15:20:02.614+01:00First Joule Thief circuit<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhisDunL07wT50Rz6Ixqh1OsMFkVWb7l3HrYnFNctgXVb6DB42WqsPRvu3KLUcTIPDkPpgV6oecilQHWTgSeCt0VdX8v2vQFcT-TUsPECXOiaaPN29kFwZ19EMwepdoCi3MQgLy7qMFUHUP/s1600/Joule+Thief.jpg" imageanchor="1" style="clear: right; float: right; margin-bottom: 1em; margin-left: 1em;"><img border="0" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhisDunL07wT50Rz6Ixqh1OsMFkVWb7l3HrYnFNctgXVb6DB42WqsPRvu3KLUcTIPDkPpgV6oecilQHWTgSeCt0VdX8v2vQFcT-TUsPECXOiaaPN29kFwZ19EMwepdoCi3MQgLy7qMFUHUP/s320/Joule+Thief.jpg" width="240" /></a>It's amazing thing seeing a 'dead' battery produce useable power!<br />
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Alternatively, using this circuit, you can use a regular 1.5V AA cell to light up a white LED which normally only wake up at around 3V. Very clever!<br />
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To learn the how and why of it all, visit <a href="http://en.wikipedia.org/wiki/Joule_thief">Wikipedia</a><br />
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JP helped me do the soldering on this. He was in charge of the solder (new lead free solder by the way). I plumped for a big fat ferrite core that I had lying around. It can be done with teensy tiny cores but I didn't fancy the fiddle - especially with JP and it being my first attempt.<br />
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The circuit is built freeform - that is to say without a circuit board. Heatshrink comes in handy here. It fired up first time.<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgI6n_Ox-zHXSfF1jFmxSsNk-21AFV4B8A9Ocrg_DYO9e3TXT6c0CE6GmWI85tRaE48QLzfEC-UM2zXZzP7hRFWDy-oKWI5yRJPViP-K04B0sBN7mpImZ3DSqeN0sDeDSXLO7AjnXx19HLI/s1600/Joule+Thief+wave+on+scope.jpg" imageanchor="1" style="clear: left; float: left; margin-bottom: 1em; margin-right: 1em;"><img border="0" height="150" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgI6n_Ox-zHXSfF1jFmxSsNk-21AFV4B8A9Ocrg_DYO9e3TXT6c0CE6GmWI85tRaE48QLzfEC-UM2zXZzP7hRFWDy-oKWI5yRJPViP-K04B0sBN7mpImZ3DSqeN0sDeDSXLO7AjnXx19HLI/s200/Joule+Thief+wave+on+scope.jpg" width="200" /></a></div>
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEihoWhVvZZIyMGEQSm6qPbt9PTRB68e9ZYqwWmJKKveHCqsUA0nzRxEQvlx50f0BlwsDyt1N3HWlGpbpeUXe3SH_yMwuWdyN9Egy-9x7czUDVz51GIlQ_cwbZWIllLVRU0l4OBjhOz7RGPz/s1600/Joule+Thief+scope+in+funky+mode.jpg" imageanchor="1" style="clear: left; float: left; margin-bottom: 1em; margin-right: 1em;"><img border="0" height="150" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEihoWhVvZZIyMGEQSm6qPbt9PTRB68e9ZYqwWmJKKveHCqsUA0nzRxEQvlx50f0BlwsDyt1N3HWlGpbpeUXe3SH_yMwuWdyN9Egy-9x7czUDVz51GIlQ_cwbZWIllLVRU0l4OBjhOz7RGPz/s200/Joule+Thief+scope+in+funky+mode.jpg" width="200" /></a><br />
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Here's a trace of the waveform on the oscilloscope. If I'm reading it right, it's peaking at around three volts.<br />
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The AA cell, under load, is putting in 1.3V at about 40mA<br />
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Putting the 'scope into XY mode produces this gorgeous trace. Fascinating - especially when you realise it's running quite fast... by my calculations, this is running at about 70kHz — 70,000 pulses a second!<br />
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For thems that wants to know mores... I was following the circuit diagram and recipe <a href="http://www.evilmadscientist.com/article.php/joulethief">here.</a><br />
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Enjoy.Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-6175527379767311555.post-52477365221005311652011-06-10T09:00:00.001+01:002011-06-10T02:40:38.788+01:00Guernsey Racing Limpets™You saw it here first folks!<br />
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<iframe allowfullscreen="" frameborder="0" height="349" src="http://www.youtube.com/embed/sSNF-UP0_FE?rel=0" width="425"></iframe><br />
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If you want to learn to how to build a Racing Limpet contact Gen at <a href="http://www.thegallery.gg/">www.thegallery.gg</a> and sign up for my Limpet Racing Masterclass (should be on Sun 31st July). I can't wait!Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-6175527379767311555.post-42916647707833920072011-06-09T15:34:00.002+01:002011-06-09T15:36:56.679+01:00ArtBot making<div class="" style="clear: both; text-align: center;">I'm soon to be teaching a class of children how to make ArtBots — a type of vibrating robot that has felt-tip pens for feet. Fun fun fun!</div><br />
<iframe allowfullscreen="" frameborder="0" height="349" src="http://www.youtube.com/embed/osoGsDGv_Ig?rel=0" width="425"></iframe><br />
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Alternatively, the 'bot can be decorated and dressed up as a weird and wonderful new creature the world has never before seen then left to explore it's new environment. Sort of a robot pet.<br />
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To be a part of the fun contact Genevieve at <a href="http://www.thegallery.gg/">www.thegallery.gg</a><br />
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[m]Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-6175527379767311555.post-41053586148576444622011-01-08T20:13:00.002+00:002011-01-08T22:16:44.333+00:00Reforming plastic - experiment one<div class="mobile-photo"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgs4Nf4gRDX4SfyP7RcANFyewVjiF_wl-HcPms2W6uIopHb0_nUclKHBw4OiuqgmrBQIki5ZqsHvdnM7nkZxel0_LiiqSXMAWRhTdR0k5D5R4FHQxZV5WFTCGSLa5O84Rb0O5W2-2Z1Dz56/s1600/photo-756303.jpg"><img alt="" border="0" id="BLOGGER_PHOTO_ID_5559910569588828994" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgs4Nf4gRDX4SfyP7RcANFyewVjiF_wl-HcPms2W6uIopHb0_nUclKHBw4OiuqgmrBQIki5ZqsHvdnM7nkZxel0_LiiqSXMAWRhTdR0k5D5R4FHQxZV5WFTCGSLa5O84Rb0O5W2-2Z1Dz56/s320/photo-756303.jpg" /></a></div>I've had an idea for a while to reshape plastic with heat. Specifically 200 liter barrels!<br />
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The first experiment has been to pop a drinks bottle in the oven. ;)<br />
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I put a dash of water in it and spun up the oven to maybe 150C. It made a little steam pressure as the temperture rose. Fairly soon the bottom of the bottle made a rather nice balloon! :)<br />
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I pulled it out just in time before it burst. It's thin but pretty strong.<br />
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The experiment has confirmed a few thoughts in my mind;<br />
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<ol><li>it's doable</li>
<li>the vessel needs containment otherwise the expansion runs away at the weakest point.</li>
</ol><br />
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Next step... not sure yet. ;)Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-6175527379767311555.post-71121441272971962492010-10-10T00:29:00.000+01:002010-10-10T00:29:09.350+01:00All together now...I've been playing with some code and simple hardware that allows the Arduino to pretend to be a USB keyboard...<br />
<object height="385" width="480"><param name="movie" value="http://www.youtube.com/v/b_y5L2N67HI?fs=1&hl=en_US&rel=0&color1=0x2b405b&color2=0x6b8ab6"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/b_y5L2N67HI?fs=1&hl=en_US&rel=0&color1=0x2b405b&color2=0x6b8ab6" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="480" height="385"></embed></object><br />
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And, now, when you hook up all the recent bits... shiftIN, shiftOUT and Virtual USB Keyboard...<br />
<object height="385" width="480"><param name="movie" value="http://www.youtube.com/v/Rv3eJYagdXU?fs=1&hl=en_US&rel=0&color1=0x2b405b&color2=0x6b8ab6"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/Rv3eJYagdXU?fs=1&hl=en_US&rel=0&color1=0x2b405b&color2=0x6b8ab6" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="480" height="385"></embed></object><br />
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BIG thanks to Jonathan Oxer and Philip J. Lindsay for sharing their code and methods!<br />
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[m]Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-6175527379767311555.post-9854189308395076742010-10-04T17:11:00.002+01:002010-10-04T17:13:09.321+01:00Arduino and loads of LEDs<div style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px;"><span class="Apple-style-span" style="font-family: 'Helvetica Neue', Arial, Helvetica, sans-serif;">Needing to hook up lots of LEDs to an Arduino? The obvious choice is to simply hook the LEDs to the digital output pins and away you go. However, this will only give you 14 LEDs.</span></div><div style="clear: left; float: left; font: normal normal normal 12px/normal Helvetica; margin-bottom: 1em; margin-right: 1em; margin-top: 0px;"><span class="Apple-style-span" style="font-size: medium;"><span class="Apple-style-span" style="font-family: 'Helvetica Neue', Arial, Helvetica, sans-serif;"><br />
</span> </span></div><div class="separator" style="clear: both; text-align: center;"></div><div class="separator" style="clear: both; text-align: center;"><a href="http://www.blogger.com/goog_1126192969" style="clear: left; float: left; margin-bottom: 1em; margin-right: 1em;"><span class="Apple-style-span" style="font-family: 'Helvetica Neue', Arial, Helvetica, sans-serif;"><img border="0" height="179" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjTQOXefcpmE9w1zXGBTWV7ORMAQ3dn5gUXJEMvNXVdpg3ARjbx7lX9-HBSFhLnamCw5QZOiYLuzrluUi6UAKWZ9IU0xLdQBNu19tAW63hpuePbnVgrCp_52hh28PHs9QEMD-NSu-qPk6RK/s200/74HC595.jpg" width="200" /></span></a><span class="Apple-style-span" style="font-family: 'Helvetica Neue', Arial, Helvetica, sans-serif;"><span class="Apple-style-span" style="-webkit-text-decorations-in-effect: none; color: black;"></span></span></div><div style="text-align: left;"><span class="Apple-style-span" style="font-family: 'Helvetica Neue', Arial, Helvetica, sans-serif;">OR, you can hook one of these fellas. Catchily named "75HC595" - but known as a Shift Register. From just three pins on the Arduino you can drive 8 LEDs! and the fun doesn't stop there... hooking up another one of these puppies to (essentially) the same pins gives you another 8 LEDs :- a total of 16 LEDs off just three pins on the Arduino!! ...I don't know what the limit is but I've seen somebody driving 24 LEDs with three of these chained together. Very cool.</span></div><span class="Apple-style-span" style="font-family: 'Helvetica Neue', Arial, Helvetica, sans-serif;"><br />
</span><br />
<span class="Apple-style-span" style="font-family: 'Helvetica Neue', Arial, Helvetica, sans-serif;"><br />
</span><br />
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<span class="Apple-style-span" style="font-family: 'Helvetica Neue', Arial, Helvetica, sans-serif;">So, here's what I've done so far...</span><br />
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</span></div><div style="font: 12.0px Helvetica; margin: 0.0px 0.0px 0.0px 0.0px;"><span class="Apple-style-span" style="font-family: 'Helvetica Neue', Arial, Helvetica, sans-serif;">First up - one '595</span><br />
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</span><br />
<span class="Apple-style-span" style="font-family: 'Helvetica Neue', Arial, Helvetica, sans-serif;">Next - two '595s — I just ran out of red LEDs!</span><br />
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<span class="Apple-style-span" style="font-family: 'Helvetica Neue', Arial, Helvetica, sans-serif;"><br />
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<span class="Apple-style-span" style="font-family: 'Helvetica Neue', Arial, Helvetica, sans-serif;">Lastly - I added a potentiometer to control which LED is lit.</span><br />
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<span class="Apple-style-span" style="font-family: 'Helvetica Neue', Arial, Helvetica, sans-serif;"><br />
</span><br />
<span class="Apple-style-span" style="font-family: 'Helvetica Neue', Arial, Helvetica, sans-serif;"><br />
</span><br />
<span class="Apple-style-span" style="font-family: 'Helvetica Neue', Arial, Helvetica, sans-serif;">It's a ball and it's pretty darn simple!</span><br />
<span class="Apple-style-span" style="font-family: 'Helvetica Neue', Arial, Helvetica, sans-serif;"><br />
</span><br />
<span class="Apple-style-span" style="font-family: 'Helvetica Neue', Arial, Helvetica, sans-serif;">Next challenge - experiment with a similar chip... "74HC166" ...which allows eight buttons or switches to be connected to three Arduino pins - and can be chained together also! ;)</span><br />
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<span class="Apple-style-span" style="font-family: 'Helvetica Neue', Arial, Helvetica, sans-serif;">[m]</span></div>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-6175527379767311555.post-37695198425157277952010-09-24T12:02:00.039+01:002010-09-27T23:33:44.577+01:00DC Motor Driven by Arduino<div class="mobile-photo">At last, I've mustered up the courage to hook up a DC motor to the Arduino!<br />
<br />
<div class="separator" style="clear: both; text-align: center;"><object height="385" width="480"><param name="movie" value="http://www.youtube.com/v/o9Bigqct1ts?fs=1&hl=en_US&rel=0&color1=0x2b405b&color2=0x6b8ab6"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/o9Bigqct1ts?fs=1&hl=en_US&rel=0&color1=0x2b405b&color2=0x6b8ab6" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="480" height="385"></embed></object></div><br />
The reason that it's a big deal is that you can't connect a DC motor directly to the output pins on the Arduino - it'll draw too much current and fry the Arduino chip. This method uses a transistor to switch the large amount of motor current with a small amount of 'control' current. As an added level of safety for the Arduino, I've also use an Opto-Isolator which a means of completely separating the two circuits - control and output. Unless I do something silly (!), the Arduino should be safe. (I already fried one transistor in testing because I'd forgotten to put a diode across the back end of the motor!)<br />
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BIG respect and thanks to Mike Cook for his <a href="http://www.thebox.myzen.co.uk/Workshop/Motors_1.html">excellent article</a> on hooking up motors.<br />
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My circuit diagram is a hacked together version of a couple of his diagrams.</div><table cellpadding="0" cellspacing="0" class="tr-caption-container" style="float: left; margin-right: 1em; text-align: left;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhaDO3aL-U9ZdnE9OHYW1yqtQhXmRldmIyZKYrbBgNbCKGqC71XR882elmd6CnHm70eNqcNHeMx4VKG1ER8lneBIfv4qXyjMAeMC-72hrlPYEWVLssx4oGr5T3YKSrASnhDarrP7tfgxBfP/s1600/pastedGraphic-744171.png" style="clear: left; margin-bottom: 1em; margin-left: auto; margin-right: auto;"><img alt="" border="0" id="BLOGGER_PHOTO_ID_5520433755272008578" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhaDO3aL-U9ZdnE9OHYW1yqtQhXmRldmIyZKYrbBgNbCKGqC71XR882elmd6CnHm70eNqcNHeMx4VKG1ER8lneBIfv4qXyjMAeMC-72hrlPYEWVLssx4oGr5T3YKSrASnhDarrP7tfgxBfP/s320/pastedGraphic-744171.png" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">(used with permission - thanks Mike)</td></tr>
</tbody></table><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhaDO3aL-U9ZdnE9OHYW1yqtQhXmRldmIyZKYrbBgNbCKGqC71XR882elmd6CnHm70eNqcNHeMx4VKG1ER8lneBIfv4qXyjMAeMC-72hrlPYEWVLssx4oGr5T3YKSrASnhDarrP7tfgxBfP/s1600/pastedGraphic-744171.png" style="clear: left; float: left; margin-bottom: 1em; margin-right: 1em;"><span class="Apple-style-span" style="-webkit-text-decorations-in-effect: none; color: black;"></span></a></div><div class="separator" style="clear: both; text-align: center;"><br />
</div><div style="text-align: left;">The immediate application is for driving the blades on our learning project GRZR - the robot mower!</div>Unknownnoreply@blogger.com0