[EMS Discuss] Inkjet-printed circuits?

Mark Danburg-Wyld EMAIL HIDDEN
Fri Nov 22 12:16:54 PST 2013


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> 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> 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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