load cell with display DIY Kit

load cell with display DIY Kit has HX711 load cell amplifier and 4 Digit TM1637 display along with Arduino Nano, that can be easily assembled as described in the below video along with the Arduino code for quick prototype.

Components included in this DIY kit:

1. 10Kg Load Cell:
   • A sensor that converts force into an electrical signal. Commonly used in weighing scales.
   • Note: Load cell and frame structure can be customized based on your requirement.
2. HX711 Amplifier:
   • A precision 24-bit analog-to-digital converter (ADC) designed for weigh scales and industrial control applications. It amplifies the small signal from the load cell and converts it into a digital signal that can be read by a microcontroller.
3. TM1637 Display:
   • A 4-digit 7-segment display module that is easy to interface with microcontrollers. It is often used to display numerical data like weight.
4. Arduino Nano: Microcontroller.
5. Load Cell Frame Structure: capable to handle up to 10Kg Load along with its accessories.

Steps to Build load cell with display DIY Kit:

1. Wiring:
   • Connect the load cell to the HX711 amplifier.
   • Connect the HX711 to your microcontroller Arduino Nano
   • Connect the TM1637 display to the microcontroller.
2. Programming:
   • Use libraries for the HX711 and TM1637 to simplify coding.
   • Write a program to read the data from the HX711, process it, and display it on the TM1637.
3. Calibration:
   • Calibrate the load cell to ensure accurate measurements. This typically involves placing known weights on the load cell and adjusting the code accordingly.

Example Code (Arduino):

#include “HX711.h”
#include <Arduino.h>
#include <TM1637Display.h>

#define DOUT_HX 5
#define CLK_HX 6

#define CLK_TM 2
#define DIO_TM 3

HX711 scale(DOUT_HX, CLK_HX);
TM1637Display display(CLK_TM, DIO_TM);

float weight;
float weight_gms;

void setup() {

delay(5000);
Serial.begin(9600);
scale.set_scale(-96650); //Calibration Factor obtained from first sketch
scale.tare();
display.setBrightness(100);
}

void loop() {

weight = scale.get_units();
weight_gms = weight * 225; //To debug the value of the sensor, change it (255)

if (weight_gms <= 10000)
display.showNumberDec(weight_gms, false);
else
display.showNumberDec(weight, false);

}

Schematic: