WTB 1-2 QTC squares

Hoping to give them as part of a Christmas gift to a technically-minded person who would enjoy experimenting with them.

I would also like to have a small amount. There is little time before Christmas but maybe it would be possible to make a group buy?…

Steve has some for sale in this site

Thanks for the heads-up. Just ordered some.

+1

Nice :+1:

Not cheap but not unreasonably priced.
The question is: could we get them cheaper on a GB? Most sources seem be gone. I remember seeing some UK shop though earlier this year which had good prices for large quantities but I fail to find them now…

Can try asking Steve for GB pricing.

OK, I found that supplier:

5-pack of 10x10x1 mm pills is $4.58 but shipping is $7.68. Not much more than a 2-pack (of unspecified size) from veleno.

I found also
http://zoflex.com/products.html
They sell sheets.
Small sheet 152x152x1 mm is $35 + $11.5 shipping.
They have also larger sheets (304x304), 3 different thicknesses (0.5, 1, 1.5 mm), 2 hardness choices.

The Valeno designs pill will most likely be 4mm x 4mm.

That’s a really good deal for the mindsets 10mm pills if the material has the same or better properties to the usual QTC stuff.

I gotta ask… what exactly do you use this stuff for?

If I remember correctly, you can make an infinitely variable output flashlight with it, but sadly, QTC isn't very durable.

BLF member Match used QTC years ago in one of his threads.

There are a few light makers that produce QTC flashlights:

  • Veleno
  • Peak
  • Fraz
  • I’ve seen a rumour that Acebeam 10160 uses QTC to

Myself I love QTC, it’s extremely simple and works great. I like this from-firefly-to-turbo adjustment better than any non-e-switch UI. And e-switches come with a few issues of their own, especially if one wants a really small light.

Thanks guys. Cool stuff indeed. It’s the first time I’ve seen/heard of it. I can certainly see the appeal of it, at least for lights using batteries that don’t have over-discharge issues.

I was interested so a little more googling shows that “Velostat pressure sensitive conductive sheet” is available from many places such as Tinkersphere $3.99 for 12” x 12” piece. Same stuff available directly from Adafruit, Digikey or Amazon for slightly more. Same properties as QTC???

As I remember from Match the only hitch in using this was getting it to stay at one setting. Need some kind of detent to hold the pressure steady.

Great, now you’ve got me wondering what I can do with Indium Tin Oxide Coated PET Plastic :person_facepalming: :smiley:

It’s only 0.1 mm thick…

Isn’t this possible to make yourself?
I mean like a piece of plastic sponge, soaked with graphite and latex mixture or something?
(i guess i should try that myself ?)

It is difficult enough to get the factory stuff working properly.

So, i guess that’s a no then… :person_facepalming: