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/diy/ - Do It Yourself

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1371122 No.1371122 [Reply] [Original]

Can someone give me ANY RELEVANT INFORMATION about flex sensors? I'm poor as fuck, so no way I'm going to pay 12 USD per unit + 90 USD shipping. I'll try to make it. I did read the data sheet from Spectra Symbol, but it's not enough. I wanna know all properties from the material, how it's made, etc.

Seriously, any information.

>> No.1371123

>>1371122
A friend of mine had to perform load testing using flex sensors. I remember them costing a hell of a lot more than $12.

>> No.1371125

>>1371123
https://www.adafruit.com/product/182

12.95 USD. How can I contact your friend?

>> No.1371128

>>1371122
There’s a few ways to make them.

The way that would probably be the easiest is the get two strips of aluminum foil and a strip of carbon foam.
As the carbon foam gets squished between the foil it will conduct more.

So you get high resistance at no flex, and low-ish resistance at high flex.

>> No.1371134

>>1371123
>>1371125
they were probably better sensors

OP see if you cant buy directly from China, i just found some on aliexpress for 12.00 but shipping was only 2.95

>> No.1371137

>>1371128
Thansks, I'll try it.

>>1371134
I'm from brazil, it would take 1 week for the sensor enter in the country and then, if I'm lucky enough, in 4 months I would have it in my hands. Also, I make 45USD/m, this is my last option.

>> No.1371165

>>1371137
As in $45/month? Jesus Christ just start sucking dick or something. Also what're you needing them for?

>> No.1371209

>>1371128
If that's how it is, it sounds like you could replace carbon foam with literally any slightly resistive powder

>> No.1371496

>>1371209
>>1371137
I've made 'carbon foam' radeation absorbing foam for knocking off side lobes on parabolic antennas in there ray domes.

Anyhow its just carbon black (lamp black) suspended in paint or other binder and applied to open cell foam. You can stick the foam in the liquid and squeeze out the excess. Getting it uniform and all that is a pain in the ass but if you can calibrate your shit to your foam its not an issue.

>> No.1371501

https://www.google.com/search?q=diy+flex+sensor
https://www.google.com/search?q=diy+flex+force+sensor

>> No.1371620

>>1371165
Dude, my dad makes 700 USD/m and feeds a family of 5.

>what're you needing them for?
Armour, I'm planning to rob a bank. Here it's easier than you think.

>> No.1371625
File: 90 KB, 1280x896, uma.jpg [View same] [iqdb] [saucenao] [google]
1371625

>>1371620
>Favela monkeys

>> No.1371628

>>1371625
The jew should fear us. I'll regret nothing.

>> No.1371642
File: 277 KB, 200x200, 1518032215194.gif [View same] [iqdb] [saucenao] [google]
1371642

>>1371628
yes please
rob that bank
the weak should fear the strong