<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div style="-webkit-text-size-adjust: auto; "><span style="font-family: '.HelveticaNeueUI'; font-size: 15px; line-height: 19px; white-space: nowrap; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.296875); -webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-text-size-adjust: none; "><a href="http://blog.reprap.org/2013/02/conducting-plastic-experiments.html?m=1">http://blog.reprap.org/2013/02/conducting-plastic-experiments.html?m=1</a></span></div><div><font face=".HelveticaNeueUI"><span style="font-size: 15px; line-height: 19px; white-space: nowrap; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469);"><br></span></font></div><div><font face=".HelveticaNeueUI"><span style="font-size: 15px; line-height: 19px; white-space: nowrap; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469);">That the most recent thing I've read on 3d printing with conductive filament.  Apparently they had some success using graphite and silver since both react differently and complimentary. </span></font></div><div><font face=".HelveticaNeueUI"><span style="font-size: 15px; line-height: 19px; white-space: nowrap; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469);"><br></span></font>Kassie<br><span style="-webkit-text-size-adjust: auto;">Sent from my iPhone</span></div><div style="-webkit-text-size-adjust: auto; "><br>On Nov 12, 2013, at 9:54 AM, Taper Wickel <<a href="mailto:taper@waxwolf.com">taper@waxwolf.com</a>> wrote:<br><br></div><blockquote type="cite" style="-webkit-text-size-adjust: auto; "><div><span>I've been playing with this myself, on the conductive-ink/paint/glue</span><br><span>end; with some mixed results.</span><br><span></span><br><span>*  I've lit LEDs with conductive ink on paper, which is kinda fun. A</span><br><span>thing to note is that the graphite/graphene based inks are resistive;</span><br><span>depending on the length/thickness of the trace, you might not need an</span><br><span>extra resistor for the LED! Also, you can draw potentiometers!</span><br><span></span><br><span>* I've tried 3-d printing a circuit board for use with the conductive</span><br><span>glue. The idea I had was essentially a block with little troughs for</span><br><span>the glue to stay in; push the glue in there, push down the components,</span><br><span>and voilĂ . Except it didn't work.  I blame the roughness of the thing;</span><br><span>next try will have deeper (and a little wider) troughs, and I may use</span><br><span>a syringe to apply the glue instead of the eyedropper-type applicator.</span><br><span></span><br><span>* I also want to see if you can incorporate enough graphite/graphene</span><br><span>into polymorph/shapelock plastic to make it conductive/resistive.</span><br><span>I've got a big thing of lamp black I picked up at an art store that</span><br><span>would at least make the plastic black, but I don't know if its</span><br><span>graphite is in the right form to do conductive.  Thanks for the links</span><br><span>to RMS Graphite, Sam; that should point me in the right general</span><br><span>directions.  I figure if this is doable at all, I could make 3d</span><br><span>circuit structures, and then cover them in normal, insulative plastic,</span><br><span>and end up with blinky-light plastic objects. Or something.</span><br><span></span><br><span>Taper.</span><br><span></span><br><span></span><br><span>On Tue, Nov 12, 2013 at 9:27 AM, Sam Foster <<a href="mailto:sam@sneetchworks.com">sam@sneetchworks.com</a>> wrote:</span><br><blockquote type="cite"><span>First, I love seeing published research published freely and openly like</span><br></blockquote><blockquote type="cite"><span>this. I've been kind of watching this space for the last couple of years.</span><br></blockquote><blockquote type="cite"><span>Its great to see a paper that connects up the dots and proposes a practical</span><br></blockquote><blockquote type="cite"><span>and relatively affordable way of making home-printed circuits. The silver</span><br></blockquote><blockquote type="cite"><span>ink is expensive however. For simple circuits you can use copper tape (see</span><br></blockquote><blockquote type="cite"><span>specialists suppliers like 3M, or just go to the garden center and pick up</span><br></blockquote><blockquote type="cite"><span>slug and snail tape - same stuff). This technique is used for some great</span><br></blockquote><blockquote type="cite"><span>demos by  Jie Qi <a href="http://www.youtube.com/user/qijies/videos">http://www.youtube.com/user/qijies/videos</a></span><br></blockquote><blockquote type="cite"><span></span><br></blockquote><blockquote type="cite"><span>For the ink, this guy has been doing some great work on how to produce the</span><br></blockquote><blockquote type="cite"><span>kind of nanoparticles and conductivity you need using what he calls "jam jar</span><br></blockquote><blockquote type="cite"><span>chemistry" - kitchen/hardware-store chemicals and equipment.</span><br></blockquote><blockquote type="cite"><span><a href="http://www.youtube.com/channel/UC4AkVj-qnJxNtKuz3rkq16A">http://www.youtube.com/channel/UC4AkVj-qnJxNtKuz3rkq16A</a></span><br></blockquote><blockquote type="cite"><span>He also has set up an online store with some of his graphite and graphene</span><br></blockquote><blockquote type="cite"><span>products: <a href="https://sites.google.com/site/rmsgraphite/">https://sites.google.com/site/rmsgraphite/</a></span><br></blockquote><blockquote type="cite"><span>This video has details on making the kind of copper nano-particles you'd</span><br></blockquote><blockquote type="cite"><span>need for a conductive ink: <a href="http://www.youtube.com/watch?v=oVN9DV1LmSU">http://www.youtube.com/watch?v=oVN9DV1LmSU</a> - but</span><br></blockquote><blockquote type="cite"><span>there are others in his collection also. Even if you have no intention of</span><br></blockquote><blockquote type="cite"><span>making the stuff, I recommend his videos for rediscovering the simple joy of</span><br></blockquote><blockquote type="cite"><span>chemistry in a really accessible way.</span><br></blockquote><blockquote type="cite"><span></span><br></blockquote><blockquote type="cite"><span>..you can of course just buy the stuff - auto stores sell a pen for</span><br></blockquote><blockquote type="cite"><span>repairing the heating elements on rear car windows. Electronics supply</span><br></blockquote><blockquote type="cite"><span>stores have something similar - that works great. You just draw your traces</span><br></blockquote><blockquote type="cite"><span>and with care you can solder to it.</span><br></blockquote><blockquote type="cite"><span></span><br></blockquote><blockquote type="cite"><span>I did a quick experiment hooking a button cell battery up to light up a</span><br></blockquote><blockquote type="cite"><span>couple of LEDs, where I used copper tape for the traces and sticky tape to</span><br></blockquote><blockquote type="cite"><span>handle and secure SMD LEDs to the traces that was delightfully easy and</span><br></blockquote><blockquote type="cite"><span>effective. <a href="http://www.youtube.com/watch?v=2_IxxMbfQQY">http://www.youtube.com/watch?v=2_IxxMbfQQY</a></span><br></blockquote><blockquote type="cite"><span></span><br></blockquote><blockquote type="cite"><span>I'm currently working on using the same idea for a simple AA powered light,</span><br></blockquote><blockquote type="cite"><span>where the circuit, battery holder and structure are all built on a sheet of</span><br></blockquote><blockquote type="cite"><span>plastic that can be coiled up and shoved into the top of a bottle.</span><br></blockquote><blockquote type="cite"><span></span><br></blockquote><blockquote type="cite"><span>/Sam</span><br></blockquote><blockquote type="cite"><span></span><br></blockquote><blockquote type="cite"><span></span><br></blockquote><blockquote type="cite"><span></span><br></blockquote><blockquote type="cite"><span>On 11/11/2013 1:17 PM, Dan Robinson wrote:</span><br></blockquote><blockquote type="cite"><blockquote type="cite"><span></span><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><span>Has anyone here read about this? I think this, combined with 3D printing,</span><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><span>is going to mean innovative electronics will soon make a quantum jump, for</span><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><span>better and worse. At least when we can 3D print with several materials in</span><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><span>one step, as with 2D color.</span><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><span></span><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><span></span><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><span><a href="http://www.kurzweilai.net/how-to-inkjet-print-circuits-at-fraction-of-time-and-cost?utm_source=KurzweilAI+Daily+Newsletter&utm_campaign=66ba2bb6f8-UA-946742-1&utm_medium=email&utm_term=0_6de721fb33-66ba2bb6f8-281953809">http://www.kurzweilai.net/how-to-inkjet-print-circuits-at-fraction-of-time-and-cost?utm_source=KurzweilAI+Daily+Newsletter&utm_campaign=66ba2bb6f8-UA-946742-1&utm_medium=email&utm_term=0_6de721fb33-66ba2bb6f8-281953809</a></span><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><span></span><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><span>Dan</span><br></blockquote></blockquote><blockquote type="cite"><span></span><br></blockquote><blockquote type="cite"><span></span><br></blockquote><blockquote type="cite"><span>_______________________________________________</span><br></blockquote><blockquote type="cite"><span>Discuss mailing list</span><br></blockquote><blockquote type="cite"><span><a href="mailto:Discuss@eugenemakerspace.com">Discuss@eugenemakerspace.com</a></span><br></blockquote><blockquote type="cite"><span><a href="http://eugenemakerspace.com/mailman/listinfo/com.eugenemakerspace.discuss">http://eugenemakerspace.com/mailman/listinfo/com.eugenemakerspace.discuss</a></span><br></blockquote><blockquote type="cite"><span></span><br></blockquote><span>_______________________________________________</span><br><span>Discuss mailing list</span><br><span><a href="mailto:Discuss@eugenemakerspace.com">Discuss@eugenemakerspace.com</a></span><br><span><a href="http://eugenemakerspace.com/mailman/listinfo/com.eugenemakerspace.discuss">http://eugenemakerspace.com/mailman/listinfo/com.eugenemakerspace.discuss</a></span><br></div></blockquote></body></html>