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.
We recommend our combinator board to make it easy to turn the four strain gauges into a wheatstone bridge type load cell.
We are interfacing 40kg load cell to the arduino using hx711 load cell amplifier module.
If you are planning on using load sensors 1 you will need to obtain or purchase four units.
In this arduino tutorial of hx711 load cell amplifier interface.
See the wiring diagram for how to connect the load cells hx711 and arduino.
The load cell has four wires which must be connected to the first four pins of the hx711 module.
A good option for connecting all the load cells in a clean easy to understand way is the sparkfun load cell combinator board.
Red wire to e black wire to e white wire to a and green wire to a.
The strain gauge load cell amplifier shield.
It reads the information from the load cell amplifies the signals and then sends it to the arduino for processing.
That s exactly what the hx711 board does.
It s a low.
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.
Common load cells have four wire to connect the hx711 to a.
This can get a little confusing.
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.
First the load cell is connected to the hx711 module.
Luckily there is a new option for those seeking a plug and play solution to avoid extra wiring and coding.
Single strain gauge load cells only have three wires instead of four suggested reading.
This board makes interfacing an arduino and an instrumentation amplifier significantly easier.
The changes in electrical resistance provided by the load cell need to be amplified so that they can be read by an arduino.
Some of the load cell wires are connected together to form what is called a wheatstone bridge arrangement.
If you aren t familiar with the following concepts we recommend reviewing them before.
