Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes an Arduino UNO microcontroller interfaced with an RFID-RC522 module, an LCD Display (16x4 I2C), and a Servomotor SG90. The circuit is designed to read RFID tags, display information on the LCD, and control the servomotor based on the RFID input. The Arduino UNO serves as the central processing unit, managing the communication between the RFID module, the display, and the servomotor.

Component List

Arduino UNO

• Microcontroller board based on the ATmega328P
• It has 14 digital input/output pins, 6 analog inputs, a 16 MHz quartz crystal, a USB connection, a power jack, an ICSP header, and a reset button.

RFID-RC522

• A radio frequency identification (RFID) reader module that operates at 13.56 MHz.
• It communicates with the Arduino via SPI protocol.

LCD Display 16x4 I2C

• A 16x4 character LCD display with an I2C interface module.
• It displays information and is connected to the Arduino through the I2C bus.

Servomotor SG90

• A small and lightweight servo motor capable of precise control.
• It can be positioned at various angles from 0 to 180 degrees.

JST PH 2.0 connector

• A 2-pin connector commonly used for battery and signal connections.

Splicing connector WAGO 221

• A reusable splicing connector with lever nuts used for easy wire connections.

Comment

• A placeholder for additional notes or comments in the circuit design.

Wiring Details

Arduino UNO

• 3.3V connected to RFID-RC522 VCC (3.3V)
• 5V connected to Splicing connector WAGO 221 Port 1
• GND connected to Splicing connector WAGO 221 Port 1
• A4 (SDA) connected to LCD Display 16x4 I2C SDA
• A5 (SCL) connected to LCD Display 16x4 I2C SCL
• D13 (SCK) connected to RFID-RC522 SCK
• D12 (MISO) connected to RFID-RC522 MISO
• D11 (MOSI) connected to RFID-RC522 MOSI
• D10 (SDA) connected to RFID-RC522 SDA
• D9 (RST) connected to RFID-RC522 RST
• D3 (SIG) connected to Servomotor SG90 SIG

RFID-RC522

• VCC (3.3V) connected to Arduino UNO 3.3V
• RST connected to Arduino UNO D9
• GND connected to Splicing connector WAGO 221 Port 4
• IRQ (Not connected)
• MISO connected to Arduino UNO D12
• MOSI connected to Arduino UNO D11
• SCK connected to Arduino UNO D13
• SDA connected to Arduino UNO D10

LCD Display 16x4 I2C

• SCL connected to Arduino UNO A5
• SDA connected to Arduino UNO A4
• VCC connected to Splicing connector WAGO 221 Port 5
• GND connected to Splicing connector WAGO 221 Port 5

Servomotor SG90

• SIG connected to Arduino UNO D3
• VCC connected to Splicing connector WAGO 221 Port 2
• GND connected to Splicing connector WAGO 221 Port 2

Splicing connector WAGO 221 (Instance 1)

• Port 1 connected to Arduino UNO 5V
• Port 2 connected to Servomotor SG90 VCC
• Port 4 (Not used)
• Port 5 connected to LCD Display 16x4 I2C VCC

Splicing connector WAGO 221 (Instance 2)

• Port 1 connected to Arduino UNO GND
• Port 2 connected to Servomotor SG90 GND
• Port 4 connected to RFID-RC522 GND
• Port 5 connected to LCD Display 16x4 I2C GND

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:

}

Additional Notes (documentation.txt)

No additional code documentation provided.