[EMS Discuss] Inkjet-printed circuits?

Kassie EMAIL HIDDEN
Tue Nov 12 13:06:08 PST 2013


http://blog.reprap.org/2013/02/conducting-plastic-experiments.html?m=1

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. 

Kassie
Sent from my iPhone

On 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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