Circuit Documentation

Summary

This document provides a detailed overview of a circuit that integrates an Arduino UNO microcontroller with various sensors and modules, including an RFID reader, a rain/snow sensor, a 16x2 I2C LCD, a 5V relay, and multiple piezo sensors. The circuit is powered by a 18650 Li-ion battery and a Type-C power bank module. The Arduino UNO is programmed to interact with these components to perform specific tasks.

Component List

1. 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

2. RFID-RC522

   • Description: A low-cost RFID reader module.
   • Pins: VCC (3.3V), RST, GND, IRQ, MISO, MOSI, SCK, SDA

3. Type-C Power Bank Module

   • Description: A module to provide power from a Type-C USB connection.
   • Pins: Gnd, +Ve (Bat), +5v

4. Piezo Sensor

   • Description: A sensor that generates a voltage when deformed.
   • Pins: +, -

5. Rain/Snow Sensor - Board

   • Description: A sensor to detect rain or snow.
   • Pins: 1, 2, A0 (Analog), D0 (Digital), GND, VCC (5V)

6. 18650 Li-ion Battery

   • Description: A rechargeable lithium-ion battery.
   • Pins: -, +

7. 16x2 I2C LCD

   • Description: A 16x2 character LCD with I2C interface.
   • Pins: GND, VCC, SDA, SCL

8. 5V Relay

   • Description: A relay module that operates at 5V.
   • Pins: Normally Open, Common terminal, Normally Closed, In, GND, VCC

Wiring Details

Arduino UNO

• 3.3V connected to VCC (3.3V) of RFID-RC522
• 5V connected to VCC of 16x2 I2C LCD
• GND connected to GND of 5V relay, 16x2 I2C LCD, and RFID-RC522
• Vin connected to VCC of 5V relay
• A0 connected to A0 (Analog) of Rain/Snow Sensor - Board
• A4 connected to SDA of 16x2 I2C LCD
• A5 connected to SCL of 16x2 I2C LCD
• D13 connected to SCK of RFID-RC522
• D12 connected to MISO of RFID-RC522
• D11 connected to MOSI of RFID-RC522
• D10 connected to SDA of RFID-RC522
• D9 connected to RST of RFID-RC522
• D3 connected to In of 5V relay

RFID-RC522

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

Type-C Power Bank Module

• Gnd connected to - of 18650 Li-ion Battery and GND of Rain/Snow Sensor - Board
• +Ve (Bat) connected to Common terminal of 5V relay

Piezo Sensors

• + of all piezo sensors connected to 1 of Rain/Snow Sensor - Board
• - of all piezo sensors connected to 2 of Rain/Snow Sensor - Board

Rain/Snow Sensor - Board

• A0 (Analog) connected to A0 of Arduino UNO
• GND connected to Gnd of Type-C Power Bank Module
• VCC (5V) connected to Normally Open of 5V relay

18650 Li-ion Battery

• - connected to Gnd of Type-C Power Bank Module and GND of Rain/Snow Sensor - Board
• + connected to Normally Open of 5V relay and VCC (5V) of Rain/Snow Sensor - Board

16x2 I2C LCD

• VCC connected to 5V of Arduino UNO
• GND connected to GND of Arduino UNO
• SDA connected to A4 of Arduino UNO
• SCL connected to A5 of Arduino UNO

5V Relay

• GND connected to GND of Arduino UNO
• VCC connected to Vin of Arduino UNO
• In connected to D3 of Arduino UNO
• Common terminal connected to +Ve (Bat) of Type-C Power Bank Module
• Normally Open connected to + of 18650 Li-ion Battery and VCC (5V) of Rain/Snow Sensor - Board

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:

}

This code is a basic template for the Arduino UNO. The setup() function is where you initialize your components and the loop() function is where you place the main logic that runs repeatedly.