Questions tagged [load-cell]
A load cell is a transducer which converts force into a measurable electrical output.
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HX711 always read same value
I'm trying to use a www.sparkfun.com/products/13879 with one 3 wires load cell I gathered from an old scale, so I reproduced this schematic. However the reading is always the same.
I use the code from ...
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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 ...
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TrackPoint a.k.a pointing stick 2-axis force sensor
I have an application that would benefit from a sensitive two-axis force or bending torque measurement very much like what a pointing stick (a.k.a. TrackPoint) used to do in a ThinkPad, apparently ...
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usual unloaded load cell diagonal voltage?
I found a load cell and wonder if its working or damaged since the diagonal voltage is not zero with no load on it. The diagonal voltage is about two volts when I supply 5 volts. There are no stickers ...
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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 ...
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Difficulties reverse engineering a digital bathroom scale
I apologize if this has been discussed elsewhere and for the length of the post. This is a group project and we plan to take the weight value from the scale and send it via a WiFi connection to ...
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Why do we need voltage stabilizion in bridge measuring system with ratiometric connection?
i found in many weight scale reference designs that they use either low noise linear regulator or voltage reference for voltage stabilization.
Why do we use them if ratiometric design cancel the ...
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How to interface the HX711 Weight Scale ADC with a microcontroller? [closed]
In my project I need to interface HX711 24 bit External ADC to STM32L100RC6 MCU
How can I do this ?
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Measuring Load cells [closed]
On a 3-wire load cell that has a black , red, and white wire.........
I would think if I ohmed out the resistance between the red and white or red and black or any combination there of, that I would ...
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Load cell circuit does not work on circuit simulator
I want to simulate a load cell interfacing with AD620 for amplification.
- My load cell is 40 Kg max with 2mV/V sensitivity and 10 V excitation voltage with input resistance of 405 ohm and output ...
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Using 8 half-bridge load cells together
In my Arduino project, I want to combine 8 half-bridge load cells (each has 3 wires: red, black, and white) because I will be weighing irregularly shaped objects and 4 points of contact may not be ...
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Why isn't my load cell detected by openscale?
I want to measure the pull force on a rope, so I bought myself a Sparkfun OpenScale and this tensile load cell. I just received both of them, so I connected them as described and hooked the OpenScale ...
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Can I read out this 10V load cell with the 5V OpenScale board?
For a robotics project in which I want to build a kite flying robot I want to measure the pull force on the rope connected to the kite. To measure this pull force I bought this load cell (which ...
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INA125P Strain gauge amplification problem
I'm using the INA125P to amplify the strain of a 350 ohm strain gauge in a self-built Wheatstone bridge circuit for measurement. I'm testing using a 351 ohm resistor to mimick a strain gauge under ...
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Negative differential to instrumentation amplifier causing problems
I am using a pair of strain gauges to make a weight scale. The strain gauges are the three-wire type that you can by on Amazon or Sparkfun. The strain gauges form a full wheatstone bridge, whose ...
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Hook up a load cell with High Level Amplied Output (only input+ input- output+) to load cell amplifer
I have been successfully hooking up load cells (e.g., TAS606, red = E+, green = O+, black = E-, and white = O-) and load sensors (with help from a load cell contaminator ) to load cell amplifer (e.g., ...
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Has anyone worked with HX711 load cell amplifier / weighting sensor through Arduino? [closed]
I am talking about this product: http://www.ebay.in/itm/232127458591?aff_source=Sok-Goog
I need to know the following:
1) What outputs are represented by DT and SCK?
2) What inputs are B- and B+?
...
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Load Cell has abnormal wire coloring
pulled a load cell from a small scale that I bought from amazon. I read online about how to use a INA125P to amplify the signal from the load cell, but when i examined the load cell i pulled from the ...
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Readings from Load Cell Combinator and HX711 connected to an Arduino Uno
I'm trying to get a reading from a set of four 3-wire load cells connected with a Sparkfun Load Cell Combinator (link removed) to a Sparkfun HX711 amplifier.
I've followed the Sparkfun hookup guide (...
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Understanding load cell
I am trying to understand how load cell works and which one to choose for my project.
For example lets say I use this load cell.
List of properties in case the link won't work:
Weight Capacity Max 5 ...
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Why there is a resistor soldered across output (green) and excitation (black) in a S-Beam load cell?
As the photo displayed above, it is a S-Beam load cell. We selected the same color of wires that connect the header of the load cell. As we can see, there is a resistor soldered across output (green) ...
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How does a bathroom scale automatically power on when I step on it?
When I step on a bathroom scale how does the circuit turn on? I've disassembled these types of weight scales looking for obvious hardware switches, but none exist. I suspect the ADC is configured to ...
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2x rs232 communication, single wirelss connection, also rs232 to control load cell perameters
I am struggling to find any information on the ability to have 2 rs232 connections with 1 wifi connection.
I have found this wireless chip, which supports, five Ethernet ports, two serial ports:
http:...
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Can I read a Load Cell value from Electric Imp?
I would like to connect a Load Cell to an Electric Imp and read the weight's value.
I have found quite a few of tutorials where a temperature sensor is attached to the Electric Imp (see: https://www....
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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 ...
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How to connect a load combinator to a load amplifier for load cells
I would like to link 4 load cells sensors to an arduino. I am trying to follow this tutorial. I am using this load combinator
and I need to connect it to this load amplifier
The combinator has E+ E- ...
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Remove spikes from Load Cell readings
I have developed load indicator interfaced with load cell to display the value of load. The device is to be used in on-line weighing of a bag that is moving over the conveyor. Due to the mechanical ...
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How to mount a Half Bridge Load cell
I have half bridge load cells similar to the ones in the image below. While I understand the circuitry and hooking up the differential output of the load cell to an INA, I am not sure how these are ...
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Smoothing load cell readings with a capacitor
I'm interfacing a load cell using a HX711 ADC to read its results into a microcontroller.
Many of the code samples take numerous readings (about 10) and average the result, but I was wondering if the ...
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Is there any pitfalls in converting (amplifying) analog DC signal from transducer to measurements, except noise
I need to measure force with a load cell and transmit it to a computer.
The load cell outputs 2mV/V for whole range. Vdd < 12V, so I have 0..24mV signal, which I assume is enough to have good ...
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Monitoring a large array of load cells
I have a large array of 8x8 load cells I'd like to monitor, and I'm looking for an efficient way to do that.
Obviously, one option is 64 independent instrumentation amplifiers, but that's expensive ...
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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 ...
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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 ...
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Using 3.5 mm cable to connect load cells?
I have some 300 lbs. 4-wire load cells that I need to connect to a PCB. Their nominal resistance is 350 Ω, and they will be excited at 3.3 V. The goal is to read the force on a PSoC microcontroller. ...
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Arduino with Weighing Scale
Let me preface this by saying I'm a total beginner to this. My area is Software, not usually electronics; and I haven't done any since I was in high school.
I've done a lot of reading about ...
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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 ...
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Measuring touch-weight resistance in piano keys
Piano technicians, such as myself, use an old, labor intensive way of measuring touchweight resistance in piano keys. I would like to automate this process electronically.
This is an explanation of ...
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Is programmable gain amplifier(PGA) in ADC enought to get me precision
I have 4 x 3wire load cells from a old weight scale connected as a full-bridge and I want to connect them in my uC ( Atmega328P, but not arduino ).
I want to measure weight under these specs:
...
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Load Cell Data Problem - INA125P + Arduino Uno
I am currently reading data from my 30kg load cell with my Arduino UNO board and passing this data to my PC. I am using INA125P to amplify the voltage of my load cell and it is established on a bread ...
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What is a "button load cell"? [closed]
I just came across this little gadget called "button load cell", it seems to be a sensor that can measure weight but what exactly does it do? What is its intended application? I do not even have an ...
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Do bridge load-sensors follow linearity?
I have been using four half bridge load-sensors. After forming a bridge, the output of the bridge is fed into ADC(ADS1230). I'm using this load-cell. From the output of the ADC, I want to convert it ...
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How to smooth analog data?
I am trying to read load cells data, but these values are very fluctuating. I have ADS1230 ADC and I had configured it to the internal gain of 128. Four half-bridge load cells are connected in a ...
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Four Half Bridge Load Sensors outputs highly fluctuating values
I have four half bridge strain gauge load sensors connected in a wheat-stone bridge configuration. I have fed the output of the sensors to the ADC (ADS1230) which is a 20 bit analog to digital ...
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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 ...
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Configuration of load cell on digital scaling
UPDATED!
Anyone can tell me how to configure the load cell (like mine is MLC902) on digital scale? How is the calculation voltage output when is loaded by 50kg or 100kg?
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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 ...
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How to use HX711 module with PIC microcontroller?
I'm trying to use the HX711 to capture the weight of a load cell using the PIC18F4520 microcontroller.
According to the datasheet (http://www.dfrobot.com/image/data/SEN0160/hx711_english.pdf) if I ...
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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 ...
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Different weights on different temperatures - load cells and ad620
I have a set of load cells connected to a AD620. Everything is working good except when I change the temperature. The temperature can vary between -10 and 50.
I have the AD620 connected to an MCP3208, ...
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How to calculate the gain for a load cell to be used with instrumentation amp?
I was hoping someone can give me a step by step process for calculating the gain of my load cell.Here is the datasheet to it LoadCell datasheet.
I also plan on using the INA125p instrumentation ...
