Electronics > Beginners
Load Cell measuring and info display
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BoomENGR:
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!
Doctorandus_P:
I think 1 reading every 2 minutes is "farily high".
What do you think is "fairly high"?
Doctorandus_P:
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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