Making Fsr Panels (force Sensing Resister) To Register Hits

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this really deserved its own thread as it can be used for other applications than scoring for the air soft much warrior bots. I will include pictures , drawings and links.

This force-sensing resistor (FSR) from Interlink Electronics is a passive component that acts as a variable resistor, with resistance decreasing in response to increasing applied force, which makes it easy to add a touch interface to your project or create a robot with much more sophisticated tactile senses than are possible with simple lever switches. The polymer thick film (PFT) device is optimized for use in human touch control of electronic devices and can sense an applied force anywhere in the active area ranging from a few dozen grams to over 10 kg (22 lb).

In our tests, the resistance exceeded 1 M? with no applied pressure and dropped to a clearly detectable and very stable 50 k? with a 20 g weight placed on it. Pushing on the pad as hard as possible dropped the resistance to around 200 ?. This resistance range is well suited to work directly with the internal pull-ups of many microcontrollers such as AVRs and PICs. The FSR was responsive enough and sensitive enough to distinctly pick up light, rapid finger tap, and it was even able to pick up the vibrations of a small vibration motor placed on it on the motor's side.
jstarne1
Commented February 2013
1.5 inch FSR $7.95 from pololu
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These are very thin and have an adhesive backing. In this thread I will show you how other robot owners are making their own fsr panels as cost effective as possible for the end product goal.
robotmaker
Commented February 2013
ok great,i had about the same indea for my feet on my humanoid type of robot
biped type with 17 DOF and 17 servos ,i orders some parts alreal it will look kinda close to the johnny five robot only with legs and i boght already my FSR'S and my foot plates plus some sevo's and brackets
jstarne1
Commented February 2013
These are for targets on robots. The basics to note are a plastic or abs backing , attach to FSR to the plastic and cover it with 1/8" plexi to protect the far sensors.

I imagine the front and rear of a robot would have a 4 sensor fsr panel and each side a half sized fsr panel.

That means for one robot we need 12 sensors. That's 88 dollars for a entire set. Hmm anyone know where we can get a good bulk deal on 1.5 inch fsr panels.
jstarne1
Commented February 2013
Jameco.com will sell the force sensors for 6.99 in bulk order 10 or more but my uncle is a store manager at shields electronics and they have a jameco account. Maybe I can get another dollar or two off the price and a good shipping rate too.

@Bret what do you think? Like the FSR idea so the hits are electronically kept score by our ezb.

Nerf Darts - I had an idea that we could use darts with a Velcro tip and maybe Velcro covering the fsr target plate so Nerf darts that impact the fsr can be scored higher than a normal air soft strike. How's that idea?
bret.tallent
Commented February 2013
I like it.
robotmaker
Commented February 2013
Iwill try to look for the link,i have 3 different types to compare them,and been awhile since i was trying them out for my biped design by lynxmotion.

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this is close to the design only making it a lot lot better
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Avatarjstarne1
Published on Monday, February 18, 2013