Author Topic: Load Cell measuring and info display  (Read 937 times)

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Offline BoomENGRTopic starter

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Load Cell measuring and info display
« on: February 19, 2019, 05:10:00 pm »
Hey, I am a college student working on designing and building a rocket thrust tester.

I need an affordable load cell and a way to display the information on a force vs time graph on my laptop.
The rockets will be produceing around 10 to 14N of thrust.
I need it to have a fairly high readings per second.

Any suggestions will be appreciated, thank you!
 

Online Doctorandus_P

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Re: Load Cell measuring and info display
« Reply #1 on: February 19, 2019, 10:23:10 pm »
I think 1 reading every 2 minutes is "farily high".
What do you think is "fairly high"?
 

Online Doctorandus_P

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Re: Load Cell measuring and info display
« Reply #2 on: February 20, 2019, 01:36:27 am »
Bit more serious answer.

HX711 is a very popular and cheap chip and it can sample your signal at a rate of upto 80sps.
A lot of simple kitchen scales have a loadcell in them in the form of an aluminimum bar with holes & wires.
https://duckduckgo.com/?q=loadcell+hx711&iar=images&iax=images&ia=images

ADS1220 or ADC1115 or similar chips might increase your resolution / measuring speed.
https://duckduckgo.com/?q=ADC+PGA+SPI&iar=images&iax=images&ia=images

Also plenty of mechanical examples from youtube vids and complete sourcecode from github.
 


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