have your load cell, amplifier, and microcontroller hooked up, you can add your code and start calibrating your setup. Load cell measurements can be off by /- 5 due to a range of things including temperature, creep, vibration, drift, and other electrical and mechanical interferences. Next, connect each of the four load sensors to the following pins: Load Sensor Load Combinator Board Red C Black - White The combinator board also has room for an 8 pin RJ45 socket, which can be used to connect your project via Ethernet cables. Hello, i have load cell and the amplifier. Your mount will be unique, but here are the guidelines you need to follow:. The four wires coming out from the wheatstone bridge on the load cell are usually: Excitation (E) or VCC is red Excitation- (E-) or ground is black. Arduino pin 2 - HX711 CLK 3 - DAT 5V - VCC GND - GND The HX711 board can be powered from.7V to 5V so the Arduino 5V power should be fine.
Without spacers, load would be transferred directly from the moving plate to the fixed plate without affecting the load cell. To follow along, you'll need: SparkFun Load Cell Amplifier - HX711 Any Strain Gauge Based Load Cell: If you are planning on using load sensors1 you will need to obtain or purchase four units. Features : Operation Voltage:.7V-5V Operation Current:.5mA Selectable down hookup 10SPS or 80SPS output data rate Simultaneous 50 and 60Hz supply rejection. #include "HX711.h" #define dout 3 #define CLK 2 HX711 scale(dout, CLK float calibration_factor -7050; /-7050 worked for my 440lb max scale setup void setup gin(9600 intln HX711 calibration sketch intln Remove all weight from scale intln After readings begin, place known weight on scale intln. SparkFun Load Cell Amplifier - HX711. Resources and Going Further Now that youve successfully got your HX711 up and running, its time to incorporate it into your own project! Recommendations, optics Contest Plastics Contest Electronics Tips Tricks Challenge).