Circuit Documentation

Summary

This circuit is designed to interface various components with an Arduino UNO microcontroller. The circuit includes a DC motor controlled by an L298N motor driver, two load cells interfaced with HX711 bridge sensor interfaces, a servo motor, an I2C LCD 16x2 screen for display, and power sources including a 5V battery and a 12V battery. The Arduino UNO manages the communication and control logic for the entire system.

Component List

DC Motor

• Description: A standard DC motor used for converting electrical energy into mechanical motion.
• Pins: pin 1, pin 2

Arduino UNO

• Description: A microcontroller board based on the ATmega328P, widely used for building digital devices and interactive objects.
• Pins: UNUSED, IOREF, Reset, 3.3V, 5V, GND, Vin, A0-A5, SCL, SDA, AREF, D0-D13

Load Cell - Red/white/black/green

• Description: A transducer that converts force into an electrical signal.
• Pins: E+, A-, E-, A+

HX711 - Bridge Sensor Interface

• Description: A precision 24-bit analog-to-digital converter (ADC) designed for weigh scales and industrial control applications to interface directly with a bridge sensor.
• Pins: E+, E-, A-, A+, B-, B+, GND - GROUND, DATA (OUT), SCK - CLOCK (IN), 3.3/3.5V Supply

Servo

• Description: A rotary actuator or linear actuator that allows for precise control of angular or linear position, velocity, and acceleration.
• Pins: gnd, vcc, pulse

5v Battery

• Description: A power source providing a 5V output, typically used to power electronic components.
• Pins: +, -

L298N DC motor driver

• Description: A high-power motor driver module that allows controlling the speed and direction of two DC motors simultaneously.
• Pins: OUT1, OUT2, 12V, GND, 5V, OUT3, OUT4, 5V-ENA-JMP-I, 5V-ENA-JMP-O, +5V-J1, +5V-J2, ENA, IN1, IN2, IN3, IN4, ENB

Battery 12v

• Description: A power source providing a 12V output, typically used to power motors and other high-power components.
• Pins: -, +

I2C LCD 16x2 Screen

• Description: A liquid crystal display capable of displaying 16 characters per line in 2 lines, interfaced via the I2C protocol.
• Pins: SCL, SDA, VCC (5V), GND, VDD, VO, RS, RW, E, D0-D7, BLA, BLK

Wiring Details

DC Motor

• Wiring:
  • pin 1: Connected to L298N DC motor driver OUT3 or OUT1
  • pin 2: Connected to L298N DC motor driver OUT4 or OUT2

Arduino UNO

• Wiring:
  • 5V: Powers HX711 interfaces, I2C LCD screen, and L298N motor driver
  • GND: Common ground for HX711 interfaces, I2C LCD screen, L298N motor driver, and 12V battery
  • A4: Connected to I2C LCD screen SDA
  • A5: Connected to I2C LCD screen SCL
  • D2-D13: Control signals for HX711 interfaces, L298N motor driver, and servo

Load Cell - Red/white/black/green

• Wiring:
  • E+: Connected to HX711 E+
  • A-: Connected to HX711 A-
  • E-: Connected to HX711 E-
  • A+: Connected to HX711 A+

HX711 - Bridge Sensor Interface

• Wiring:
  • E+, E-, A-, A+: Connected to corresponding load cell pins
  • GND - GROUND: Common ground with Arduino UNO
  • DATA (OUT): Connected to Arduino UNO D2 or D4
  • SCK - CLOCK (IN): Connected to Arduino UNO D3 or D5
  • 3.3/3.5V Supply: Powered by Arduino UNO 5V

Servo

• Wiring:
  • gnd: Connected to common ground with Arduino UNO
  • vcc: Powered by 5V battery
  • pulse: Control signal from Arduino UNO D9

L298N DC motor driver

• Wiring:
  • OUT1, OUT2, OUT3, OUT4: Connected to DC motor pins
  • 12V: Powered by 12V battery
  • GND: Common ground with Arduino UNO
  • 5V: Powered by Arduino UNO 5V
  • ENA, ENB: Enable signals from Arduino UNO D7, D6
  • IN1-IN4: Control signals from Arduino UNO D10-D13

I2C LCD 16x2 Screen

• Wiring:
  • SCL: Connected to Arduino UNO A5
  • SDA: Connected to Arduino UNO A4
  • VCC (5V): Powered by Arduino UNO 5V
  • GND: Common ground with Arduino UNO

Documented Code

Arduino UNO Code (sketch.ino)

void setup() {
  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:

}

Note: The provided code is a template and does not contain any functional logic. It needs to be populated with the setup and loop functions to control the circuit components as per the requirements.