Circuit Documentation

Summary

This circuit involves multiple Raspberry Pi Pico W microcontrollers interfacing with various components including servos, a buzzer, and an RFID reader. The circuit is designed to control the servos and buzzer based on inputs from the RFID reader.

Component List

Raspberry Pi Pico W

• Description: A microcontroller board based on the RP2040 microcontroller chip.
• Pins: VBUS, VSYS, GP16, GP17, GND, GP18, GP19, GP20, GP21, GP22, RUN, GP26, GP27, GP28, ADC_VREF, 3V3 OUT, 3V3_EN, GP0, GP1, GP2, GP3, GP4, GP5, GP6, GP7, GP15, GP14, GP13, GP12, GP11, GP10, GP9, GP8

Buzzer

• Description: A passive buzzer used for sound output.
• Pins: PIN, GND

Servo

• Description: A servo motor used for precise control of angular position.
• Pins: GND, VCC, PWM

RFID-RC522

• Description: An RFID reader module used for reading RFID tags.
• Pins: SDA, SCK, MOSI, MISO, IRQ, GND, RST, 3.3V

Wiring Details

Raspberry Pi Pico W

• GND connected to:

  • Servo (GND)
  • Servo (GND)
  • Servo (GND)
  • RFID-RC522 (GND)
  • Buzzer (GND)

• 3V3 OUT connected to:

  • Servo (VCC)
  • Servo (VCC)
  • Servo (VCC)

• 3V3_EN connected to:

  • RFID-RC522 (3.3V)

• GP0 connected to:

  • Servo (PWM)

• GP1 connected to:

  • Servo (PWM)

• GP2 connected to:

  • Servo (PWM)

• GP4 connected to:

  • RFID-RC522 (MISO)

• GP5 connected to:

  • RFID-RC522 (SDA)

• GP6 connected to:

  • RFID-RC522 (SCK)

• GP7 connected to:

  • RFID-RC522 (MOSI)

• GP15 connected to:

  • Buzzer (PIN)

• GP22 connected to:

  • RFID-RC522 (RST)

Buzzer

• PIN connected to:

  • Raspberry Pi Pico W (GP15)

• GND connected to:

  • Raspberry Pi Pico W (GND)

Servo

• GND connected to:

  • Raspberry Pi Pico W (GND)

• VCC connected to:

  • Raspberry Pi Pico W (3V3 OUT)

• PWM connected to:

  • Raspberry Pi Pico W (GP0)
  • Raspberry Pi Pico W (GP1)
  • Raspberry Pi Pico W (GP2)

RFID-RC522

• SDA connected to:

  • Raspberry Pi Pico W (GP5)

• SCK connected to:

  • Raspberry Pi Pico W (GP6)

• MOSI connected to:

  • Raspberry Pi Pico W (GP7)

• MISO connected to:

  • Raspberry Pi Pico W (GP4)

• IRQ not connected

• GND connected to:

  • Raspberry Pi Pico W (GND)

• RST connected to:

  • Raspberry Pi Pico W (GP22)

• 3.3V connected to:

  • Raspberry Pi Pico W (3V3_EN)

Documented Code

{
  "components": [
    {
      "type": "RaspberryPiPicoW",
      "id": "pico",
      "x": 50,
      "y": 50
    },
    {
      "type": "RFID_RC522",
      "id": "rfid",
      "x": 200,
      "y": 50
    },
    {
      "type": "PassiveBuzzer",
      "id": "buzzer",
      "x": 200,
      "y": 150
    },
    {
      "type": "ServoMotor",
      "id": "servo1",
      "x": 200,
      "y": 250
    },
    {
      "type": "ServoMotor",
      "id": "servo2",
      "x": 250,
      "y": 250
    },
    {
      "type": "ServoMotor",
      "id": "servo3",
      "x": 300,
      "y": 250
    }
  ],
  "connections": [
    {
      "from": "pico.gpio6",
      "to": "rfid.sck"
    },
    {
      "from": "pico.gpio7",
      "to": "rfid.mosi"
    },
    {
      "from": "pico.gpio4",
      "to": "rfid.miso"
    },
    {
      "from": "pico.gpio5",
      "to": "rfid.sda"
    },
    {
      "from": "pico.gpio22",
      "to": "rfid.rst"
    },
    {
      "from": "pico.gnd",
      "to": "rfid.gnd"
    },
    {
      "from": "pico.vcc3v3",
      "to": "rfid.vcc"
    },
    {
      "from": "pico.gpio15",
      "to": "buzzer.signal"
    },
    {
      "from": "pico.gnd",
      "to": "buzzer.gnd"
    },
    {
      "from": "pico.gpio0",
      "to": "servo1.signal"
    },
    {
      "from": "pico.gpio1",
      "to": "servo2.signal"
    },
    {
      "from": "pico.gpio2",
      "to": "servo3.signal"
    },
    {
      "from": "pico.gnd",
      "to": "servo1.gnd"
    },
    {
      "from": "pico.gnd",
      "to": "servo2.gnd"
    },
    {
      "from": "pico.gnd",
      "to": "servo3.gnd"
    },
    {
      "from": "pico.vcc3v3",
      "to": "servo1.vcc"
    },
    {
      "from": "pico.vcc3v3",
      "to": "servo2.vcc"
    },
    {
      "from": "pico.vcc3v3",
      "to": "servo3.vcc"
    }
  ]
}