Circuit Documentation

Summary

This circuit integrates various components including an Arduino UNO, HX711 bridge sensor interface, load cell, hall sensor, multiple pushbuttons, a graphic LCD display, two A4988 stepper motor driver carriers, two bipolar stepper motors, and a power supply. The Arduino UNO serves as the central microcontroller, interfacing with sensors, controlling the LCD display, and managing the stepper motor drivers. The HX711 interfaces with the load cell to measure weight, while the hall sensor detects magnetic fields. Pushbuttons provide user input, and the graphic LCD display offers a visual interface. The A4988 drivers control the stepper motors, which could be used for precise positioning in applications such as 3D printers or CNC machines. The power supply provides the necessary voltage and current to the system.

Component List

Arduino UNO

• Microcontroller board based on the ATmega328P
• Provides digital and analog I/O pins
• Can be powered via USB or an external power source

HX711 - Bridge Sensor Interface

• 24-bit analog-to-digital converter (ADC) designed for weigh scales and industrial control applications
• Interfaces with load cells

Load Cell - Red/white/black/green

• Transducer that converts force into an electrical signal
• Used in conjunction with the HX711 for weight measurement

Hall Sensor

• Sensor that detects magnetic fields
• Outputs a voltage corresponding to the magnetic field strength

Pushbutton (5 instances)

• Simple switch mechanism for user input
• Normally open, closes the circuit when pressed

Graphic LCD Display (GLCD 128x64)

• Monochrome graphic display with a resolution of 128x64 pixels
• Used for displaying text, graphics, and user interface elements

A4988 Stepper Motor Driver Carrier (2 instances)

• Module for driving bipolar stepper motors
• Supports microstepping for precise control

Stepper Motor (Bipolar) (2 instances)

• Motor that moves in discrete steps
• Used for precise control of position and speed

Power Supply

• Provides regulated voltage and current to the circuit
• Essential for powering the components safely

Wiring Details

Arduino UNO

• 3.3V connected to GLCD 128x64 pin 19 A(+)
• 5V connected to A4988 Stepper Motor Driver Carrier VCC, GLCD 128x64 2 Vdd, Hall Sensor -, and HX711 3.3/3.5V Supply
• GND connected to various components including Pushbuttons, A4988 Stepper Motor Driver Carriers, GLCD 128x64, Hall Sensor, and HX711
• A0 connected to HX711 SCK - CLOCK (IN)
• A1 connected to HX711 DATA (OUT)
• A2 connected to Hall Sensor S
• D13 connected to GLCD 128x64 6 Enable
• D12, D9, D8, D7, D6 connected to Pushbuttons
• D5, D4 connected to A4988 Stepper Motor Driver Carrier STEP and DIR for the first motor
• D3, D2 connected to A4988 Stepper Motor Driver Carrier STEP and DIR for the second motor

HX711 - Bridge Sensor Interface

• E+, E-, A-, A+ connected to corresponding Load Cell pins

Load Cell - Red/white/black/green

• Interfaced with HX711 for weight measurement

Hall Sensor

• S connected to Arduino UNO A2
• + and - connected to power supply lines

Pushbuttons

• One side of each pushbutton connected to Arduino UNO digital pins D12, D9, D8, D7, D6
• Other side of each pushbutton connected to ground

Graphic LCD Display (GLCD 128x64)

• 19 A(+) and 20 K(-) connected to Arduino UNO 3.3V and GND respectively
• Control pins connected to various Arduino UNO digital pins

A4988 Stepper Motor Driver Carrier

• VCC and GND connected to power supply lines
• STEP and DIR connected to Arduino UNO digital pins for control
• 1A, 1B, 2A, 2B connected to corresponding Stepper Motor pins
• RESET and SLEEP shorted together for each driver

Stepper Motor (Bipolar)

• Connected to corresponding A4988 Stepper Motor Driver Carrier pins

Power Supply

• + and - connected to various components requiring power

Documented Code

Arduino UNO - sketch.ino

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

}

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

}

Arduino UNO - documentation.txt

(No additional documentation provided)

This concludes the documentation for the provided circuit design.