amplify load cell output

steverod

Jul 4, 2024
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Hi folks. I want to feed the output of a load cell into a little 555 sound generator. How do I amplify the signal to do this? Many thanks.
 

Harald Kapp

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Nov 17, 2011
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A simple opamp circuit can do the job.
Please supply more detail like:
  • more detail of the load cell's output
  • a schematic of your 555 circuit
  • a more detailed description what the effect of the load cell's output on the 555 circuit shall be
  • what power supply(ies) are being used. Note that with a single supply you may (or may not, depending on the circuit's details) need a rail-2-rail opamp
 

steverod

Jul 4, 2024
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Thanks for getting back so soon. The load cell is this one: https://www.ebay.co.uk/itm/314541831911?var=613097026384 but I don't want to use the HX711. I want to input the load cell into the NE555n pictured below. I made it years ago and have lost the schematic. Also, I may be in the wrong forum as I know next to nothing about electronics. Thanks again. edit: the 555 is 9V I'd like to excite the load cell with something similar (though I think it likes 5V. I've just seen this: https://maker.pro/forums/threads/audio-amplifier-to-amplify-a-load-cell-signal.280337/ Will read up on instrumentation amplifiers.
 

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danadak

Feb 19, 2021
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steverod

Jul 4, 2024
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I just bought the

AD520JD for £6.95. If nothing else I thought I could have fun with it.​

 

danadak

Feb 19, 2021
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The low cost 620 not great in common mode range, in and out.
Just keep that in mind when designing.

Regards, Dana.
 
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