All Questions
26 questions
2
votes
1
answer
546
views
How do I read a load cell just with this data?
I have a load cell (capability = 23 kg or 50 lb.) Its output is 2 mV/V. I have read that that means 2 mV per each excitation volt.
The power connection of this load cell is +15V-GND, so 0.002 * 15 = ...
- 43
0
votes
0
answers
160
views
Load Cell Bridge Resistances are ok but I cannot get reading from load cell
I have planar beam load cells that are not functioning. I bought a digitizer which was giving me a reading error which alerted me to an issue. So I unplug the cells from the summation box and I am ...
- 145
2
votes
3
answers
2k
views
What components are used for pressure sensing in a DanceRush Stardom dance pad?
This is an arcade rhythm game called DanceRush Stardom, a similar concept to Dance Dance Revolution, but the dance pad acts more like a large screen and tracks both feet.
Here is an example video of ...
- 21
1
vote
1
answer
1k
views
How to read four load cells with a single ADC input?
I am currently using strain gauge based load cells and want to weigh 1-5kg granular products on whatever container with 4loadcells beneath. I encountered a problem with connecting load cells in a ...
1
vote
1
answer
142
views
How can I synchronize load cell and sensor for sensor calibration?
I have made a glove with some cheap pressure sensors with weight ∝ 1/resistance.
DESIRED OUTPUT
I now want to create a dataset with columns "Actual Weight" and "Glove Sensor Readout&...
- 251
0
votes
2
answers
203
views
Oscilloscope or bench multi-meter for ultra high sensor sample rate measurement
I need a device to measure the output of a load cell at very high sample rates. I am aiming for a sample rate of at least 100 kHz. For this goal, I wanted to ask if it would be better to use a bench ...
- 11
0
votes
2
answers
106
views
Does shunt calibration of a sensor also correct for zero error?
In the datasheet for a load cell (shown below), it says that shunt calibration data is given, also they have mentioned the zero balance. Does the shunt calibration consider zero balance? Meaning, do I ...
2
votes
0
answers
364
views
Does creep always occur with load cells, or is there an optimum weight capacity?
I want to make a scale which I will place under a wood stove (downdraft gasifier) to measure the amount of wood that goes into the wood stove. The amount of wood which is being measured will be ...
- 21
0
votes
2
answers
118
views
TRT-25 and Arduino Uno
I need help on a project I am working on.
We are trying to integrate a reaction torque sensor and I am having a hard time deciding how to go about it.
Previously I assumed that like my load cell I ...
- 1
0
votes
1
answer
138
views
Weird component in load cell Wheatstone bridge
While trying to repair a cheap digital kitchen scale, I came across this component (see picture below). AFAICT, this is 95% identical to the standard Wheatstone bridge interconnect for combining 4 ...
- 309
0
votes
1
answer
451
views
Read data from strain-gauge Labjack, Arduino
I am working on a project where we have to record breathing data. For that we ordered a LabJack U3-LV along a with an amplifier (datasheet) and a belt which is some kind of strain gauge I think. We ...
- 101
-1
votes
1
answer
174
views
Analog Sensor output signal accuracy and sensitivity
I have to decide between 2 load cell models. the only difference between the two is that the output on one is 2mV/V and the other is 3mV/V. Both are rated at 2.5klbs.
Which one of them would be more ...
1
vote
1
answer
3k
views
Load cell temperature compensation
Can someone explain to me how this (as advertised) full bridge load cell works?
I'm aiming for good temperature stability and I understood a full bridge load cell configuration should reject error ...
- 113
-1
votes
1
answer
2k
views
Connect load cell to hx711
I have a 50 kg load cell and an HX711 sensor (as in the image below), my problem is that in all the tutorials I've seen people use load cells with 4 output wires or 2 cells with 3 output cables, I ...
1
vote
1
answer
142
views
Sensor to measure small amounts of tension?
I would like to measure the a small amount of tension (less than a newton) in a line. I've found products that do this for much much larger amounts of tension. I've also seen "stretch sensors" but ...
- 207
1
vote
2
answers
1k
views
How to count the number of objects in a bottle?
I am working on a pet project using arduino where I need to keep track on number of objects in a bottle.It requires counting the number of objects(size of a regular pill and approximately of the same ...
- 13
6
votes
2
answers
23k
views
Connect HX711 to a three wire load cell
I have the following load cells:
I'm using the following HX711 amplifier
Every guide i can find on the internet describes how to connect a load cell with four wires to the amplifier. How can i ...
- 161
1
vote
2
answers
594
views
Best sensor for measuring a dynamic force
I am working on a project to hopefully measure dynamic loads (weight) within the range of 0 - 100 kg with a minimum accuracy of about 1-4 kg. What is the best type of sensors to use for this ...
- 911
0
votes
1
answer
1k
views
Can I measure large force using series FSR?
Is it possible to measure large force using multiple Force Sensitive Resistors in a series? Will I have to stack the resistors up? Will the measurement be reliable if I place them side by side?
I ...
- 1,191
-1
votes
2
answers
598
views
Whcih type of load sensor should i use to calculate weight placed in a shopping cart
I wish to calculate the load inside a shopping cart and i am confused on which type of load cell/sensor should i use. Assuming weight from (0-50 kg).
This sensor is to be interfaced with Arduino.
- 250
3
votes
2
answers
3k
views
Detecting foot steps
I'm building an interactive disco dance floor. Like the light up dance floors from the 70's, but each floor panel should be able to detect when it's being stepped on and possibly light up to show this....
- 243
1
vote
1
answer
2k
views
What should a load cell response curve look like?
I have ordered some load cells from a Chinese supplier, and I asked for a load/output calibration report.
The chart they sent me looks like this...
Correct me if I'm wrong - but this is supposed to ...
- 265
3
votes
1
answer
717
views
What is the pressure/force sensor used in the Beddit?
The Beddit sleep-tracking device (Beddit and @indiegogo) has a pressure sensor that looks like a thin (~0.3mm?), flexible tape about 2ft long. The tape seems to be constructed of several layers ...
- 3,541
5
votes
1
answer
7k
views
Does this loadcell's creep mean that I can not let a constant load on the loadcell?
I want to build a connected scale that I can set coffee powder (for example) on it and check over the internet how much of coffee I still have without going to see it.
Usually all loadcells have a ...
- 293
6
votes
3
answers
19k
views
Is the Excitation Voltage of a load cell a strict specification?
When using load cells (or strain gages generically), is the Excitation Voltage spec provided as a strict minimum -- or is it just a recommendation which one can go below as long as one is OK with a ...
- 4,972
5
votes
2
answers
8k
views
Load Cell Amplifier AD620
I know AD620 is an old part but it is available at my place. I intend to develop a Load Cell amplifier. Load cell is 2mV/V. I am planing to use AD620 for it. Following are my calculations:
Excitation ...
- 235