Tutorial: Force Sensitive Resistor and Arduino

Here we will show how to use a force resistive sensor with your Arduino. The force sensor works like a potentiometer, with more force, we have less resistance. For example, if nothing is pressing the sensor, the resistance will be the maximum of 20Mohm. If the force is high, the resistance tends to 0. This sensor can measure forces between 1kN to 100kN. You can easily use the gravity acceleration to measure object weights. Also, the sensor only measure forces applied to the highlighted area in red below. If the object is positioned outside that area, we can get a wrong read.

To test the sensor, pick a multimeter to measure the resistance. Press the sensor and observe the values changing.

With your Arduino board and a 100K resistor, make this circuit:

Then, upload the following code:

int Senval=0;

int Senpin=A0;

void setup()
{
    Serial.begin(9600);
}

void loop()
{

    Senval=analogRead(Senpin);

    Serial.println(Senval);

    delay(200);
}

Open the serial monitor (last button on your 1.0 IDE). You should see a number ranging from 0 to 1023. Make some pressure on your sensor and observe the values. These values represents a voltage between 0 and 5V read by the Arduino. We made a resistor divider, if the resistance is exactly 100kohm, the value will be 512. As the sensor resistance gets higher, that value will get higher.

References:

http://www.sparkfun.com/products/9376

http://www.fabiobiondi.com/blog/2009/11/arduino-and-electronic-sens...

Views: 24338

Comment

You need to be a member of GarageLab (arduino, electronics, robotics, hacking) to add comments!

Join GarageLab (arduino, electronics, robotics, hacking)

Latest Activity

Profile IconEmma Junge and Halil Birtan joined GarageLab (arduino, electronics, robotics, hacking)
yesterday
m fluer is now a member of GarageLab (arduino, electronics, robotics, hacking)
Saturday
Craig P. Summers commented on GarageLab's blog post A Robot Controlling a Switch
"True automation is becoming more frequent in todays life as automated home helps home homeowners in…"
Saturday
Profile Icongeorge villaflor, Steve Kotlowski, John McClure and 1 more joined GarageLab (arduino, electronics, robotics, hacking)
May 20
Anthony M. Hagy commented on GarageLab's blog post Project Sunroof
"Great project idea. The roof is an important part of home, roof contractor plays an important role…"
May 20
Anthony M. Hagy commented on GarageLab's blog post Apple Aims to Test Self-Driving Cars at Military Base
"Nice Post. Thank you for sharing."
May 20
Profile IconMarcus Ataide, abdelrahman taher, Anthony M. Hagy and 4 more joined GarageLab (arduino, electronics, robotics, hacking)
May 16
Profile IconKeshava DEv, bryan mcfadden and babbelkwebbel joined GarageLab (arduino, electronics, robotics, hacking)
May 9
Rosa Yu is now a member of GarageLab (arduino, electronics, robotics, hacking)
May 6
Profile IconMarvin Wright and chaudhari vipin vasudev joined GarageLab (arduino, electronics, robotics, hacking)
May 4
Marcelo Rodrigues replied to Peter Davies's discussion Anyone got stock of Garagelabs automation board
"Peter, I will talk them to check if they can produce more units and make available on their…"
May 3
Brian B. Feaster commented on GarageLab's blog post Information Trade Between Cars by Wi-Fi
"I like this idea of information trade between cars by the WI-Fi . This would contribute in reducing…"
May 2
Peter Davies replied to Peter Davies's discussion Anyone got stock of Garagelabs automation board
"Hi Marcello I have bought all of Seeeds stock in two purchases - 8 units in all.  When I asked…"
May 2
Profile Icontarun patel, Enrique S. Perez Rodriguez, K Fiore and 5 more joined GarageLab (arduino, electronics, robotics, hacking)
May 2
Marcelo Rodrigues replied to Peter Davies's discussion Anyone got stock of Garagelabs automation board
"Peter, You can buy them on…"
May 2
Rob Lambert joined Marcelo Rodrigues's group
Thumbnail

Arduino

Group for the Arduino communitySee More
Apr 30
Sardar Tamoor commented on Thulana Vimukthi's blog post GPS GUIDED AUTONOMOUS ROBOT
"can you plz help me on my project !!! its basically obstacle avoidance in dynamic environment and…"
Apr 27
Sardar Tamoor commented on Thulana Vimukthi's blog post GPS GUIDED AUTONOMOUS ROBOT
"can you plz help me on my project !!! its basically obstacle avoidance in dynamic environment and…"
Apr 27
Sardar Tamoor is now a member of GarageLab (arduino, electronics, robotics, hacking)
Apr 26
Peter Davies posted a discussion

Anyone got stock of Garagelabs automation board

HiI have a requirement for 11 automation boards and have been able to source 8,  does anyone have a…See More
Apr 25

© 2016   Created by Marcelo Rodrigues.   Powered by

Badges  |  Report an Issue  |  Terms of Service