Circuit Documentation

Summary

This circuit integrates an Arduino UNO microcontroller with an RFID-RC522 module, a limit switch, a 5V relay, and a hobby gearmotor powered by a 4.5V battery pack. The Arduino UNO is used as the central processing unit, interfacing with the RFID module for identification purposes and controlling the relay which in turn drives the gearmotor. The limit switch serves as an input device to the Arduino, providing a means to trigger events when activated.

Component List

Arduino UNO

• Microcontroller board based on the ATmega328P
• Digital I/O Pins: 14 (of which 6 provide PWM output)
• Analog Input Pins: 6
• Operating Voltage: 5V

Limit Switch

• A switch that is actuated by the motion of a machine part or presence of an object
• Pins: Common (C), Normally Open (NO), Normally Closed (NC)

Battery AAx3 4.5V

• A battery pack consisting of three AA cells in series
• Output Voltage: 4.5V

Hobby Gearmotor with 48:1 Gearbox

• A DC motor with an attached gearbox to reduce speed and increase torque
• Operating Voltage: Typically around 6V

RFID-RC522

• An RFID reader/writer module
• Operating Voltage: 3.3V

5V Relay

• An electromechanical switch used to control a high power circuit with a low power signal
• Pins: Normally Open (NO), Common terminal (COM), Normally Closed (NC), Input (In), Ground (GND), Voltage Supply (VCC)

Wiring Details

Arduino UNO

• 3.3V connected to RFID-RC522 VCC (3.3V)
• D9 connected to RFID-RC522 RST
• GND connected to RFID-RC522 GND, 5V relay GND, and Limit switch NC
• D12 connected to RFID-RC522 MISO
• D11 connected to RFID-RC522 MOSI
• D13 connected to RFID-RC522 SCK
• D10 connected to RFID-RC522 SDA
• 5V connected to Limit switch NO and 5V relay VCC
• A5 connected to Limit switch C
• D6 connected to 5V relay In

Limit Switch

• NO connected to Arduino UNO 5V
• NC connected to Arduino UNO GND
• C connected to Arduino UNO A5

Battery AAx3 4.5V

• GND connected to 5V relay Common terminal
• VCC connected to Hobby Gearmotor pin 2

Hobby Gearmotor with 48:1 Gearbox

• pin 1 connected to 5V relay Normally Open
• pin 2 connected to Battery AAx3 4.5V VCC

RFID-RC522

• VCC (3.3V) connected to Arduino UNO 3.3V
• RST connected to Arduino UNO D9
• GND connected to Arduino UNO GND
• MISO connected to Arduino UNO D12
• MOSI connected to Arduino UNO D11
• SCK connected to Arduino UNO D13
• SDA connected to Arduino UNO D10

5V Relay

• GND connected to Arduino UNO GND
• VCC connected to Arduino UNO 5V
• In connected to Arduino UNO D6
• Normally Open connected to Hobby Gearmotor pin 1
• Common terminal connected to Battery AAx3 4.5V GND

Documented Code

Arduino UNO Code (Primary Controller)

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

}

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

}

Arduino UNO Code (Secondary Controller)

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

}

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

}

Note: The actual functionality of the code is not provided in the input and should be implemented according to the specific requirements of the circuit's operation.