Circuit Documentation

Summary

This document provides a comprehensive overview of a circuit designed to interface various components with an Arduino Nano microcontroller. The circuit includes basic passive components like resistors and LEDs, power supply modules like a Li-ion battery and a boost converter, sensors like the BMP280 and MAG3110, communication modules like the LoRa Ra-02 SX1278, a piezo buzzer, and an SD card module for data storage. The circuit is designed to perform multiple functions, which may include sensing, data logging, wireless communication, and visual indication.

Component List

Resistors

• 220 Ohm Resistors: Two resistors with a resistance of 220 Ohms, typically used for current limiting applications such as LED protection.
• 330 Ohm Resistor: A single resistor with a resistance of 330 Ohms, also used for current limiting or other applications requiring a specific resistance value.

LEDs

• Red LEDs: Two-pin red LEDs, likely used as visual indicators in the circuit.

Microcontrollers

• Arduino Nano: Two Arduino Nano microcontrollers, which are the central processing units of the circuit, responsible for controlling the behavior of other components.

Power Supply

• 18650 Li-ion Battery: A rechargeable battery used as the power source for the circuit.
• TP4056: A charging module for the Li-ion battery.
• Boost Converter MT3608: A module used to step up the voltage from the battery to a higher level required by certain components in the circuit.

Sensors

• BMP280: A sensor for measuring atmospheric pressure and temperature.
• Adafruit AMG8833: An infrared thermal camera module.
• OV7670: A camera module for capturing images.
• Adafruit ADXL345: An accelerometer for measuring acceleration forces.
• MAG3110: A magnetometer for measuring magnetic fields.

Communication Modules

• LoRa Ra-02 SX1278: A long-range communication module based on LoRa technology.
• SD Card Module: A module for reading and writing data to an SD card.

Other Components

• Piezo Buzzer: An electronic device that produces sound when an electrical signal is applied.

Wiring Details

Resistors

• 220 Ohm Resistors: Connected to the D13/SCK pin of one Arduino Nano and the cathodes of the red LEDs.
• 330 Ohm Resistor: Connected to the D12/MISO pin of one Arduino Nano and the MISO pin of the SD card module.

LEDs

• Red LEDs: The cathodes are connected to the 220 Ohm resistors, and the anodes are connected to the ground (GND).

Arduino Nano

• Arduino Nano 1: Connected to various components including the OV7670 camera module, SD card module, LoRa module, and sensors via digital and analog pins. It also interfaces with the second Arduino Nano.
• Arduino Nano 2: Connected to resistors, the piezo buzzer, and shares some connections with the first Arduino Nano.

Power Supply

• 18650 Li-ion Battery: Connected to the TP4056 charging module and the input of the boost converter MT3608.
• TP4056: Interfaces with the Li-ion battery and the boost converter.
• Boost Converter MT3608: Its output is connected to the VIN pins of both Arduino Nanos.

Sensors

• BMP280: Connected to the SDA and SCL pins of both Arduino Nanos for I2C communication and to the 3.3V and GND for power.
• Adafruit AMG8833: Connected to the SDA and SCL pins of both Arduino Nanos for I2C communication and to the 5V and GND for power.
• OV7670: Connected to various digital pins of one Arduino Nano for image capture control.
• Adafruit ADXL345: Connected to the SDA and SCL pins of both Arduino Nanos for I2C communication and to the 3.3V and GND for power.
• MAG3110: Connected to the SDA and SCL pins of both Arduino Nanos for I2C communication and to the 5V and GND for power.

Communication Modules

• LoRa Ra-02 SX1278: Connected to the SPI pins (MOSI, MISO, SCK, NSS) of one Arduino Nano for SPI communication and to the 3.3V and GND for power.
• SD Card Module: Connected to the SPI pins (MOSI, MISO, SCK, CS) of one Arduino Nano for SPI communication and to the 5V and GND for power.

Other Components

• Piezo Buzzer: Connected to the D9 pin of one Arduino Nano and to the ground (GND).

Documented Code

Arduino Nano 1 (Instance ID: 07bd9bda-ae86-4531-a789-8c4ae1c1e5db)

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

}

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

}

Arduino Nano 2 (Instance ID: 109a362c-8871-44a7-b09d-cd29b318b1c1)

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

}

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

}

Note: The provided code for both Arduino Nanos is a template with empty setup and loop functions. The actual functionality needs to be implemented based on the specific requirements of the circuit.