Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes an Arduino UNO microcontroller, a 12V battery, a barcode scanner, an LCD display, a resistor, a trimmer potentiometer, and an SD module. The circuit is designed to interface these components for various functionalities, including display and data storage.

Component List

Arduino UNO

• Description: A microcontroller board based on the ATmega328P.
• Pins: UNUSED, IOREF, Reset, 3.3V, 5V, GND, Vin, A0, A1, A2, A3, A4, A5, SCL, SDA, AREF, D13, D12, D11, D10, D9, D8, D7, D6, D5, D4, D3, D2, D1, D0

Battery 12V

• Description: A 12V power source.
• Pins: +, -

Barcode Scanner

• Description: A device used to scan barcodes.
• Pins: VDD, SCL, SDA, RST, GND, SW, SRX, STX

LCD Display (16 pin)

• Description: A 16-pin LCD display for visual output.
• Pins: VSS, VDD, VO, RS, R_W, E, DB0, DB1, DB2, DB3, DB4, DB5, DB6, DB7, A, K

Resistor

• Description: A 220 Ohm resistor.
• Pins: pin1, pin2
• Properties: Resistance: 220 Ohms

Trimmer Potentiometer

• Description: A 10k Ohm trimmer potentiometer.
• Pins: leg1, wiper, leg2
• Properties: Resistance: 10k Ohms

SD Module

• Description: A module for interfacing with SD cards.
• Pins: CS, SCK, MOSI, MISO, VCC, GND

Wiring Details

Arduino UNO

• GND: Connected to GND of the battery, SD module, LCD display (VDD, R_W, K), and barcode scanner.
• Vin: Connected to + of the battery.
• D13: Connected to MISO of the SD module.
• D12: Connected to RS of the LCD display.
• D11: Connected to E of the LCD display.
• D10: Connected to SRX of the barcode scanner.
• D9: Connected to STX of the barcode scanner.
• D8: Connected to MOSI of the SD module.
• D7: Connected to SCK of the SD module.
• D6: Connected to CS of the SD module.
• D5: Connected to DB4 of the LCD display.
• D4: Connected to DB5 of the LCD display.
• D3: Connected to DB6 of the LCD display.
• D2: Connected to DB7 of the LCD display.

Battery 12V

• -: Connected to GND of the Arduino UNO.
• +: Connected to Vin of the Arduino UNO.

Barcode Scanner

• VDD: Connected to leg2 of the trimmer potentiometer.
• GND: Connected to GND of the Arduino UNO.
• SRX: Connected to D10 of the Arduino UNO.
• STX: Connected to D9 of the Arduino UNO.

LCD Display (16 pin)

• VSS: Connected to leg2 of the trimmer potentiometer.
• VDD: Connected to leg1 of the trimmer potentiometer.
• VO: Connected to wiper of the trimmer potentiometer.
• RS: Connected to D12 of the Arduino UNO.
• R_W: Connected to leg1 of the trimmer potentiometer.
• E: Connected to D11 of the Arduino UNO.
• DB4: Connected to D5 of the Arduino UNO.
• DB5: Connected to D4 of the Arduino UNO.
• DB6: Connected to D3 of the Arduino UNO.
• DB7: Connected to D2 of the Arduino UNO.
• A: Connected to pin1 of the resistor.
• K: Connected to GND of the Arduino UNO.

Resistor

• pin1: Connected to A of the LCD display.
• pin2: Connected to leg2 of the trimmer potentiometer.

Trimmer Potentiometer

• leg1: Connected to GND of the SD module and VDD, R_W of the LCD display.
• wiper: Connected to VO of the LCD display.
• leg2: Connected to VSS of the LCD display, VCC of the SD module, and VDD of the barcode scanner.

SD Module

• CS: Connected to D6 of the Arduino UNO.
• SCK: Connected to D7 of the Arduino UNO.
• MOSI: Connected to D8 of the Arduino UNO.
• MISO: Connected to D13 of the Arduino UNO.
• VCC: Connected to leg2 of the trimmer potentiometer.
• GND: Connected to leg1 of the trimmer potentiometer.

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:

}

Documentation (documentation.txt)

This document provides a comprehensive overview of the circuit, including the components used, their wiring details, and the code for the Arduino UNO microcontroller.