Step 6: Testing The Robot Skin

The resulting robot skin has a resistance between 300 to 400 ohms when pressed with about 3 ounces of force anywhere on the surface. The top and bottom conductive layers are connected together to create a switch with the middle layer. The resistance is low enough that an led can be directly lit using five volts.

By varying the insulating dot spacing and thickness of the conductive rubber, the pressure of this touch sensor can be adjusted.
<p>Just curious, do you think it would be possible to make magnetic oogoo using a process similar to this? <a href="http://www.instructables.com/id/magnetic-silly-putty/" rel="nofollow">http://www.instructables.com/id/magnetic-silly-put...</a></p>
<p>Yes, I have tried it and it works.</p><p>Adding 3 Oogoo to 1 black iron oxide will make the Oogoo object become attracted to magnets. If you add more iron oxide it will be more attracted, but will also become less flexible.</p>
thank you mikey for hopping over to my ible and now i just opened a pandora's box! wow, thank you for the goldmine of inspirations here! <br> <br>
Hi, do you have instructions an / or pictures (even better) of how you connected the wires? I'm not quite sure on what the circuit layout should be? I would have guessed (wrongly?) that you wired up the middle Oogloo2 skin with your active, and 1 or 3 with the other wire (so the circuit could go through 1 or the other)...?
You got it right. <br> <br>Although it doesn't show the wires, If you look at the step 1 pic, the layer 2 and layer 4 wires are connected together and layer 3 makes up the other side of the switch. <br> <br>The wires are simply glued to the edge of the layers using Oogoo II. But it would be tidier to embed them when the layers are being cast.
Very neat product and ible :-)
Can I put in an &quot;order&quot; for some of this stuff to make a &quot;feeling&quot; prosthetic skin???? Would sure make walking easier for us gimps if we had a clue as to WHAT we were walking ON. <br> <br>And imagine &quot;fingers&quot; that could tell you what they were FEELING.
Can this instructable project detect where on the 'skin' it is being touched and then provide an x.y co-ord?
if you want the xy cords..... there is lil harder job and simple technique..... just make this rubber smaller... so that you make them into pixels. this tech is mostly used in digital image processing..... better try this in your's!!!!!!!!! :)
I hope this is tongue in cheek. Why would you go to all that effort for such a poor result?
this is digital image processing... no issues... it didnt tried b'fore.! just said as idea.. idea does matters rite?
Not the way it is configured now. <br> <br>It a little more complicated than simple resistance everywhere. No matter where you press on the square of skin it has a resistance of 300-400 ohms. Less if you press real hard. Pressure expands one layer and compresses two, so the resistance does not vary in a linear fashion. <br> <br>To get more precise detection, the conductive layers could be divided into smaller squares with their own wires and tiled side by side to give better resolution.
Damn, I wonder how hard it would be to develop this into being able to be more aware?
In step 5, Where is the fifth layer? I only saw four.
Thanks. <br> <br>I have changed it to say four layers.
If I could give it 10 stars I would. Not only do you make a useful material (Oogoo) but u make something potentially super useful with it. Great job.
Cool! You could even extend this to localize the touch: <br> <br>-Measure the resistance from the 4 corners <br> <br>-Using the difference between resistance as measured from the right and resistance as measured from the left, you can figure out how far right/left the touch is, by using the known resistance of the material. (Higher resistance when measured from the right means that the touch is on the left.) <br> <br>-Same for up/down <br> <br>This method only works for a single touch, but could still be useful.
Excellent job! <br> <br>I do have a couple of questions though (vaguely leading in the direction Hom3rSimpson was suggesting). <br> <br>1) What is the approximate conductivity of the oogoo itsself in terms of ohms per inch? <br>2) Since the oogoo is squishy (scientific term), does its conductivity vary based on how much pressure is applied? If so, it might also be helpful to figure out the conductivity in terms of pressure per inch.
Cool! Congratulations on being &quot;Featured.&quot;
So you basically want to make a sex doll :) <br> <br>Seriously, though, this is very good, thanks for sharing. <br>
Double Plus Good!
Conductive rubber? What's next, non-conductive wire?? :) Really nice job. Thanks for posting.
could you add the wiring on the first pour? so it is in the goop while it dries? also does it need to be 3 layers deep with spacers or can you put a postive and negative lead on each side of one sheet and get kind of the same effect?
Yes. <br>Adding the wire or conductive thread on the first pour would be a more compact way to do it. <br> <br>The skin conducts by pushing in between the insulating spacers. With only two layers and one set of spacers, there would be dead spots where you push directly on a spacer.
Plain and simple: Cool stuff! :)
Well isn't this the niftiest! <br>I must give it a try!!! <br> <br>thanks!
This is amazing! Such an incredibly cool idea with so many potential applications, made with simple, easy to find ingredients...
Wow! What a great project, and very well presented.
this is exactly what i was thinking for an use of the conductive Oogoo <br>just havent found the time to experiment with it <br>very neat job =]

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Bio: I believe that the purpose of life is to learn how to do our best and not give in to the weaker way.
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