Wow, this is super awesome! I am actually trying to something similar to this for a school project, but the programming and EE stuff is a bit out of my league. Would you possibly be up give give me some advice?
Hi. This guide is excellent! I am curious if you could give me some advice on hooking this up using a n AD620 instead of an INA125. http://www.analog.com/en/specialty-amplifiers/instrumentation-amplifiers/ad620/products/product.html
hi, i have a problem to understand the gain. I have 2500kg load cell. it has a 2mV/V. im using exitation 5v from the arduino board. then the max signal is 2mV/V*5V=10mV. The the arduino can handle a max voltage at 5v. Therefore i need gain= 5V/10*10^-3V= 500. from the datasheet, 500 gain= 121 ohm resistor. I end up using like 40 ohm resistance. when i had 121ohm on, i pulled all i had, and got like 10kg on my graph(should be 40-50kg). also i the voltage from the output is 0,08V when there is no load on. i get the value 0,397. Thanks for any answer.
The INA125P datasheet clearly states that "Positive supply voltage must be 1.25V above the desired reference voltage." Hence, if you are supplying 5 V from the Arduino, you should use Vref2.5, instead of Vref5, i.e. VrefOUT pin of the INA125P should be connected to the Vref2.5 pin, and not to the Vref5 pin. To use the Vref5 pin you should be supplying the INA125P chip with at least 6.25 Vdc.
I'm not able to view your diagrams. They aren't working for me and rather redirecting me to an error page. Could you please re-upload them? I'm working on a project using your code and am trying to determine how it works.
hi, I am trying to build a arduino load cell which measures 100kgs. I found this guide very helpful. Can u please assist me in how much resistance and supply from arduino is needed to set the gain which can measure load upto 100kg. regards!!
Hi,
SvarSletis it possible this system to be made with opamp LM324n?
Regards !!!
Hi,
SvarSletis it possible this system to be made with opamp LM324n?
Regards !!!
You can definately use op amps for this as well, but I just find it much easier to work with the INA125.
SvarSletWow, this is super awesome! I am actually trying to something similar to this for a school project, but the programming and EE stuff is a bit out of my league. Would you possibly be up give give me some advice?
SvarSletHi. This guide is excellent! I am curious if you could give me some advice on hooking this up using a n AD620 instead of an INA125. http://www.analog.com/en/specialty-amplifiers/instrumentation-amplifiers/ad620/products/product.html
SvarSlethi, i have a problem to understand the gain. I have 2500kg load cell. it has a 2mV/V. im using exitation 5v from the arduino board. then the max signal is 2mV/V*5V=10mV. The the arduino can handle a max voltage at 5v. Therefore i need gain= 5V/10*10^-3V= 500. from the datasheet, 500 gain= 121 ohm resistor. I end up using like 40 ohm resistance. when i had 121ohm on, i pulled all i had, and got like 10kg on my graph(should be 40-50kg). also i the voltage from the output is 0,08V when there is no load on. i get the value 0,397. Thanks for any answer.
SvarSletThe INA125P datasheet clearly states that "Positive supply voltage must be 1.25V above the desired reference voltage." Hence, if you are supplying 5 V from the Arduino, you should use Vref2.5, instead of Vref5, i.e. VrefOUT pin of the INA125P should be connected to the Vref2.5 pin, and not to the Vref5 pin. To use the Vref5 pin you should be supplying the INA125P chip with at least 6.25 Vdc.
SvarSletHi Chris,
SvarSletI'm not able to view your diagrams. They aren't working for me and rather redirecting me to an error page. Could you please re-upload them? I'm working on a project using your code and am trying to determine how it works.
hi, I am trying to build a arduino load cell which measures 100kgs. I found this guide very helpful. Can u please assist me in how much resistance and supply from arduino is needed to set the gain which can measure load upto 100kg.
SvarSletregards!!
amazing! thanks for sharing!
SvarSlethello this is so awesome, but where did the pictures/diagrams go? i cant see them? can you please reupload them?????
SvarSletThanks in advance!
hello this is so awesome, but where did the pictures/diagrams go? i cant see them? can you please reupload them?????
SvarSletThanks in advance!