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Load cell is an instrument that helps to determine size of a load (either a force or weight) and converts mechanical force into digital output.
It consists of a metal core and a set of electrical resistances that transform when a force is applied to it. But it returns to its original state after force removed.
It have many purposes, including telling weight of something, weight change over time and measure strain and load on a surface. It's perfect for electronic scales, digital scales, electronic balance and many commercial scales weight involved.
To use a load cell, you need first calibrate it where you can increase or decrease calibration factor units to get your correct weight using a microcontroller.
Using a Single Load Cell 1x50kg by Adding 2 Resistors
-Connect outer wire(white and black) of load cell to E+ and E- outputs of hx711 module.
-Connect middle cable(red) of load cell to A+ input of hx711 module.
-Connect two 1k resistors to A- input of hx711 module. Then the other end of resistor to white and black wires.
-Connect GND of hx711 module to board GND, and VCC to board 5V pin.
-Connect DT and SCK of hx711 module to any digital IO pins of board.
Using Two Load Cells in a Singel Circuit 2x50kg (100kg)
-Connect opposite sides of outer wires(white and black) of two load cells.
-Connect outer wire pairs to E+ and E- output of hx711 module.
-Connect middle wire(red) of load cell to A+ and A- inputs of hx711 module.
-Connect GND of hx711 module to board GND, and VCC to board 5V pin.
-Connect DT and SCK of hx711 module to any digital IO pins of board.
Using 4 Load Cells in a Single circuit 4x50kg (200kg)
-Form a loop by linking same color outer wires(white and black) of the four load cells.
-Connect middle cable(red) of one of the diagonals to the E+ and E- outputs of the HX711 module.
-Connect the other diagonal to the A+ and A- inputs of the HX711 module.
-Connect GND and hx711 module to board GND, and VCC to board 5V pin.
-Connect DT and SCK of hx711 module to any digital IO pins of board.
Mark
2025-07-27 16:46:12
If you understand the way a wheatstone bridge works it's a breeze otherwise do your research beforehand. While looking for these I saw a lot of reviews where they found it a lot of work to figure it out. It was a breeze for me but I worked for a company that manufactured high end load cells. The set I received is very accurate +/- .1 lb
Rick
2025-06-01 16:34:21
Nicely made. Down loaded brackets to mount them from Thingiverse.com. Building scale for BMH of lead casting.
Fred H.
2025-05-10 14:52:40
These work pretty much as advertised. I had one sensor go bad as soon as I put significant weight on the scale. I just ordered a second set as they are pretty inexpensive and swapped out the bad one.Also, these are pretty accurate, but if you are using them as a long time weighing system (like a keg of beer), be aware that they drift up and down over time. I'm seeing about 5%. If you calibrate over 24hrs, you can get +- 2.5% which is reasonable.
Scott.
2025-03-15 17:00:13
This is a notoriously inaccurate, unstable moduleDozens of test later and it’s incapable of maintaining a constant valueWith load / without loadGoogle this module then “ fluctuations “And you’ll notice there isn’t a single solutionI have worked with strain gauges in labsAnd this is just infuriating !!!!!
Jay D
2025-01-21 13:46:10
Great for DIY projects. Work very well.
Hexin
2025-01-09 12:41:37
I mainly used this to make a pressure-sensing simulated button with haptics, and it does an alright job. Not as sensitive and slightly finicky when trying different add-ons and drivers. This is a good product overall since it does the job well enough for may different arduino projects
Toyz
2025-01-07 14:16:08
Arrivée avec les 4 cellules de pesage, mais la carte de commande hx711 est manquante.
Customer
2024-12-12 18:06:10
Arrived with the 4 load cells, but the hx711 control board is missing.
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