Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes an ESP32 microcontroller, a WS2815 LED strip, a 12V to 5V step-down power converter, a 12V power supply, an RFID-RC522 module, and a buzzer. The circuit is designed to control the LED strip and RFID module using the ESP32, with power management handled by the step-down converter and the 12V power supply.

Component List

1. ESP32

   • Description: A powerful microcontroller with built-in Wi-Fi and Bluetooth capabilities.
   • Pins: EN, VP, VN, D34, D35, D32, D33, D25, D26, D27, D14, D12, D13, GND, VIN, 3V3, D15, D2, D4, RX2, TX2, D5, D18, D19, D21, RX0, TX0, D22, D23, BOOT

2. WS2815 LED Strip

   • Description: An addressable LED strip that operates at 12V.
   • Pins: GND, B0, D0, +12V

3. 12V to 5V Step Down Power Converter

   • Description: A power converter that steps down 12V to 5V.
   • Pins: VIN 9v-36v, VIN+, VIN-, USB OUTPUT 5V, 5v OUTPUT, GND

4. 12V Power Supply

   • Description: A power supply that provides 12V DC.
   • Pins: +, -

5. RFID-RC522

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

6. Buzzer

   • Description: A simple buzzer for audio output.
   • Pins: PIN, GND

Wiring Details

ESP32

• GND is connected to:

  • GND of the 12V to 5V Step Down Power Converter
  • GND of the Buzzer
  • B0 of the WS2815 LED Strip
  • GND of the RFID-RC522

• VIN is connected to:

  • 5V OUTPUT of the 12V to 5V Step Down Power Converter

• 3V3 is connected to:

  • VCC (3.3V) of the RFID-RC522

• D4 is connected to:

  • PIN of the Buzzer

• D5 is connected to:

  • SDA of the RFID-RC522

• D18 is connected to:

  • SCK of the RFID-RC522

• D19 is connected to:

  • MISO of the RFID-RC522

• D21 is connected to:

  • RST of the RFID-RC522

• D22 is connected to:

  • D0 of the WS2815 LED Strip

• D23 is connected to:

  • MOSI of the RFID-RC522

WS2815 LED Strip

• GND is connected to:

  • VIN- of the 12V to 5V Step Down Power Converter
  • • of the 12V Power Supply

• B0 is connected to:

  • GND of the ESP32

• D0 is connected to:

  • D22 of the ESP32

• +12V is connected to:

  • VIN+ of the 12V to 5V Step Down Power Converter
  • • of the 12V Power Supply

12V to 5V Step Down Power Converter

• GND is connected to:

  • GND of the ESP32

• 5V OUTPUT is connected to:

  • VIN of the ESP32

• VIN- is connected to:

  • GND of the WS2815 LED Strip
  • • of the 12V Power Supply

• VIN+ is connected to:

  • +12V of the WS2815 LED Strip
  • • of the 12V Power Supply

12V Power Supply

• + is connected to:

  • VIN+ of the 12V to 5V Step Down Power Converter
  • +12V of the WS2815 LED Strip

• - is connected to:

  • VIN- of the 12V to 5V Step Down Power Converter
  • GND of the WS2815 LED Strip

RFID-RC522

• VCC (3.3V) is connected to:

  • 3V3 of the ESP32

• GND is connected to:

  • GND of the ESP32

• SDA is connected to:

  • D5 of the ESP32

• SCK is connected to:

  • D18 of the ESP32

• MISO is connected to:

  • D19 of the ESP32

• MOSI is connected to:

  • D23 of the ESP32

• RST is connected to:

  • D21 of the ESP32

Buzzer

• PIN is connected to:

  • D4 of the ESP32

• GND is connected to:

  • GND of the ESP32

Code

There is no code provided for this circuit.