All Questions
Tagged with load-cell operational-amplifier
11 questions
7
votes
4
answers
701
views
Differential vs. Single-Ended amplification for sensor sampling
I'm designing a load cell amplifier that should be low-cost, and functional in a noisy environment. The load cell is a 1k balanced full-bridge on a single package. The read speed requirement is only ...
- 161
12
votes
3
answers
1k
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Need help understanding schematics in LT1019 datasheet
We are currently using AD7795 to get ratiometric reading of 4 load cells. It works, but the chip stocks are rather volatile. So, I am thinking on using much cheaper and easier to come by MCP3424/...
- 13.1k
0
votes
2
answers
414
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Use a precision opamps or instrumentation amplifier for load cell application
I'm making a low power weighing scale with good precision. I'm contemplating if it'll be better to build a instrumentation amplifier with discrete OPAMPs of LPV821 which is low power (Iq 650 nA), high ...
- 619
0
votes
1
answer
1k
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Load cell amplification circuit operation
Here's the reference circuit for amplifying the signal from a load cell with precision OPAMPs as per the MAX44248 datasheet. Can this OPAMP circuitry be explained please. What's the relation between ...
- 619
0
votes
1
answer
934
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Instrumentation Amplifier - is it possible to have an output signal inverted, with respect to the supply voltage?
I'm doing some circuit design in order to translate a load cell input into the pedal input of a Logitech G27. What I want to achieve involves having a balanced state output as close to 5V from the ...
1
vote
1
answer
1k
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Problem encountered while amplifying load cell signal with LM358
I have an S-type load cell to measure weight up to 100 Kg. Its datasheet mentions 3mV/V against full range and excitation voltage.
When no weight is applied, the voltage is 9.9 mV (Excitation is 10 V)...
- 301
3
votes
2
answers
1k
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Cheap load cell and ADS1232 strange oscillation
I'm using four of these load cells wired in parallel and connected to an ADS1232. Overall the device (scale) is working well, but I am seeing a strange signal over a period of a few minutes after I ...
- 111
0
votes
2
answers
10k
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How to set up load sensor in a full bridge with amplifier?
I I'm somewhat new to electronics so forgive me for what I don't know. I'm learning as I go along here.
The overall project is I'm trying to make a scale connected to an arduino board that will ...
2
votes
2
answers
533
views
Vacillating display with ICL7107
for my first project I decided to make a scale using a load cell, the micro load cell 3133 from Phidgets. I also used an ICL7107 as A/D converter and the op amps are LM358.
I used a differential amp ...
0
votes
1
answer
739
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Hooking up a 3 wire load cell and measuring the output on an ADC
I am trying to get 4, 3 wire load cells connected together in the form of a wheatsone bridge correctly to measure weight. I have the following schematic used from this http://www.nerdkits.com/forum/...
- 507
1
vote
2
answers
4k
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How to hook up a load cell to an Instrumentation amplifier correctly
I am trying to get load cells connected to an instrumentation amplifier. The load-cells I have are extremely similar to the ones here https://www.sparkfun.com/products/10245. They have 3 wires coming ...
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