[EMS Discuss] Inkjet-printed circuits?

Sam Foster EMAIL HIDDEN
Fri Nov 22 18:56:59 PST 2013


That looks awesome. Note that she already shared the "recipe" for the 
ink a couple of years back:
https://www.youtube.com/watch?v=dfNByi-rrO4
I hope the kickstarter makes it, they definitely have the right idea.

/Sam

On 11/22/2013 12:16 PM, Mark Danburg-Wyld wrote:
> of possible interest: 
> http://www.kickstarter.com/projects/electroninks/circuit-scribe-draw-circuits-instantly
>
>
>
>
> On Tue, Nov 12, 2013 at 9:54 AM, Taper Wickel <EMAIL HIDDEN 
> <mailto:EMAIL HIDDEN>> wrote:
>
>     I've been playing with this myself, on the conductive-ink/paint/glue
>     end; with some mixed results.
>
>     *  I've lit LEDs with conductive ink on paper, which is kinda fun. A
>     thing to note is that the graphite/graphene based inks are resistive;
>     depending on the length/thickness of the trace, you might not need an
>     extra resistor for the LED! Also, you can draw potentiometers!
>
>     * I've tried 3-d printing a circuit board for use with the conductive
>     glue. The idea I had was essentially a block with little troughs for
>     the glue to stay in; push the glue in there, push down the components,
>     and voilà. Except it didn't work.  I blame the roughness of the thing;
>     next try will have deeper (and a little wider) troughs, and I may use
>     a syringe to apply the glue instead of the eyedropper-type applicator.
>
>     * I also want to see if you can incorporate enough graphite/graphene
>     into polymorph/shapelock plastic to make it conductive/resistive.
>     I've got a big thing of lamp black I picked up at an art store that
>     would at least make the plastic black, but I don't know if its
>     graphite is in the right form to do conductive.  Thanks for the links
>     to RMS Graphite, Sam; that should point me in the right general
>     directions.  I figure if this is doable at all, I could make 3d
>     circuit structures, and then cover them in normal, insulative plastic,
>     and end up with blinky-light plastic objects. Or something.
>
>     Taper.
>
>
>     On Tue, Nov 12, 2013 at 9:27 AM, Sam Foster <EMAIL HIDDEN
>     <mailto:EMAIL HIDDEN>> wrote:
>     > First, I love seeing published research published freely and
>     openly like
>     > this. I've been kind of watching this space for the last couple
>     of years.
>     > Its great to see a paper that connects up the dots and proposes
>     a practical
>     > and relatively affordable way of making home-printed circuits.
>     The silver
>     > ink is expensive however. For simple circuits you can use copper
>     tape (see
>     > specialists suppliers like 3M, or just go to the garden center
>     and pick up
>     > slug and snail tape - same stuff). This technique is used for
>     some great
>     > demos by  Jie Qi http://www.youtube.com/user/qijies/videos
>     >
>     > For the ink, this guy has been doing some great work on how to
>     produce the
>     > kind of nanoparticles and conductivity you need using what he
>     calls "jam jar
>     > chemistry" - kitchen/hardware-store chemicals and equipment.
>     > http://www.youtube.com/channel/UC4AkVj-qnJxNtKuz3rkq16A
>     > He also has set up an online store with some of his graphite and
>     graphene
>     > products: https://sites.google.com/site/rmsgraphite/
>     > This video has details on making the kind of copper
>     nano-particles you'd
>     > need for a conductive ink:
>     http://www.youtube.com/watch?v=oVN9DV1LmSU - but
>     > there are others in his collection also. Even if you have no
>     intention of
>     > making the stuff, I recommend his videos for rediscovering the
>     simple joy of
>     > chemistry in a really accessible way.
>     >
>     > ..you can of course just buy the stuff - auto stores sell a pen for
>     > repairing the heating elements on rear car windows. Electronics
>     supply
>     > stores have something similar - that works great. You just draw
>     your traces
>     > and with care you can solder to it.
>     >
>     > I did a quick experiment hooking a button cell battery up to
>     light up a
>     > couple of LEDs, where I used copper tape for the traces and
>     sticky tape to
>     > handle and secure SMD LEDs to the traces that was delightfully
>     easy and
>     > effective. http://www.youtube.com/watch?v=2_IxxMbfQQY
>     >
>     > I'm currently working on using the same idea for a simple AA
>     powered light,
>     > where the circuit, battery holder and structure are all built on
>     a sheet of
>     > plastic that can be coiled up and shoved into the top of a bottle.
>     >
>     > /Sam
>     >
>     >
>     >
>     > On 11/11/2013 1:17 PM, Dan Robinson wrote:
>     >>
>     >> Has anyone here read about this? I think this, combined with 3D
>     printing,
>     >> is going to mean innovative electronics will soon make a
>     quantum jump, for
>     >> better and worse. At least when we can 3D print with several
>     materials in
>     >> one step, as with 2D color.
>     >>
>     >>
>     >>
>     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
>     >>
>     >> Dan
>     >
>     >
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