Source for quantum tunneling composite?

Anyone know where I can get some?

Maplins

or even google searching it would do the trick

Hi, no results when I search Maplins. Do you have a link? I contacted a manufacturer but I'm not sure they will be into my request for prototype quantities. I was hoping to find a retailer.

Also, a google search yields a lot of research papers and one manufacturer (the one I contacted) but no retail links. Let me know if you have a secret

i ordered mine here from mutr. ignore their posted shipping rates. qtc's weigh nothing, actual shipping charge for 70 QTC's was around $4 to NY. was just over a week for shipping.
(70 QTC's covers their minimum online purchase requirements..i think min purchase was $17 after conversion, total cost with shipping was 21$).

http://www.mindsetsonline.co.uk/product_info.php?products_id=1144

Great thanks! Since you bought some, would you say the size it suited to flashlight use? It seems pretty thin so I was just wondering what your experience has been like thus far.

they are pretty small, but each one can handle up to 10amps. also being so small, they dont take up much space in the body.

The link you posted says very low stock left.

Will that be used for logic level switching?

You might be able to use it for that if it was a "plunger" as opposed to twisty. I'm just guessing it would be hard to hit the threshold accurately with a twisty.

I'm planning to use it as a dimmer in an unregulated light. Supposed to carry 10 amps...which sounds doubtful but potentially exciting!

Would someone want to to order a bunch and split 'em up? I don't want 70, maybe 4 or 5 only. Heck if you sold them off for $0.50 each you'd make some money off it, and I'd take a couple. Anyone?

Jason, I can give you a few to play with if you want to stop by Palo Alto tomorrow to get them from me. Email me for details...

I've ordered some QTC's. I will definitely share when they arrive. I'll keep you guys posted. . .

That's an interesting approach, using variable compression to make a dimmer .

smarkum said:

I've ordered some QTC's. I will definitely share when they arrive. I'll keep you guys posted. . .

Click to expand...

Great thanks, count me in for a few.

Hola Beam :wave:

If this becomes a group buy, please count me in too. Thanks!


BTW: did you guys saw on that site the Polymorph polymer? Looks great for prototyping (another source available too)


Pablo

Just an FYI: I contacted Peratech (they make QTC) and their answers to my inquiries were no, no, and no. Also, QTC is patented by them and "not available anywhere" for retail sale. So, I don't know what is being sold on the net or how long it will be available. However, Peratech will be happy to sell you a technology license for 120k don't forget to tack on engineering and manufacturing.

I do know that other conductive foams exist, so maybe the little squares we can buy are not actually QTC?

Well Bummers; the QTC I ordered was not in stock (even though they told me it was). SO, "there is a delay". We all know what that means. . .
Sorry guys. I will let you know if the situation resolves. . . Shelby

Any news on this?

Apparently this material does not like being subject to side loads when used with a twisty. I think we machinists will have to come up with a very thin device that does not turn or twist when pressure is being applied. Not difficult but the thinner the better.

Hello all, I received some QTC yesterday. It was surprising to me as I thought it wasn't in stock and wasn't coming! So, I'm thinking that I will send a couple of pieces to archer and to beamhead and then they can test it and give the details as they see fit. I don't want to be sending out crappy stuff to people. And, other than to stick it in a few of my lights, I don't know how to test it. So, after we hear from them re: the quality of this stuff, I will be open to sending it out to more! I think there are 100 pieces. . .

I hope it is good stuff. I'm going to play with it later today myself!