Hx711 is a precision 24 bit analogto digital converter adc designed for weigh scales and industrial control applications to interface directly with a bridge sensor.
Load cell wiring arduino.
The most common strain gauge is made up of very fine wire or foil set up in a grid pattern in such a way that.
The strain gauge load cell amplifier shield.
This stackable shield can be used with various low output sensors like load cells.
This board makes interfacing an arduino and an instrumentation amplifier significantly easier.
We recommend our combinator board to make it easy to turn the four strain gauges into a wheatstone bridge type load cell.
Or whatever you so desire to call it applied to the device.
Common load cells have four wire to connect the hx711 to a.
We are interfacing 40kg load cell to the arduino using hx711 load cell amplifier module.
That s exactly what the hx711 board does.
The changes in electrical resistance provided by the load cell need to be amplified so that they can be read by an arduino.
It reads the information from the load cell amplifies the signals and then sends it to the arduino for processing.
This can get a little confusing.
The load cell has four wires which must be connected to the first four pins of the hx711 module.
A load cell is a physical element or transducer if you want to be technical that can translate pressure force into an electrical signal.
After uploading the code above and appropriately wiring the hx711 to the arduino and also ensuring the hx711 is properly wired to the load cell the code should output a value close to half of 2 24 this allows the load cell to measure both positive and negative load.
If you aren t familiar with the following concepts we recommend reviewing them before.
It s a low.
The remaining pins b and b can be used if a second load cell has to be connected to the hx711 module.
Red wire to e black wire to e white wire to a and green wire to a.
In this arduino tutorial of hx711 load cell amplifier interface.
A good option for connecting all the load cells in a clean easy to understand way is the sparkfun load cell combinator board.
See the wiring diagram for how to connect the load cells hx711 and arduino.
Single strain gauge load cells only have three wires instead of four suggested reading.
First the load cell is connected to the hx711 module.
