Circuit Documentation

Summary

This circuit integrates an Arduino UNO with a Micro SD Card Module, a Real-Time Clock (RTC DS3231), an INA219 current sensor, and a Solar Panel. The Arduino UNO serves as the central microcontroller, interfacing with the SD card module for data storage, the RTC for timekeeping, and the INA219 for monitoring voltage and current from the Solar Panel. A resistor is included for protection or voltage division purposes.

Component List

Arduino UNO

• Microcontroller board based on the ATmega328P
• It has 14 digital input/output pins, 6 analog inputs, a 16 MHz quartz crystal, a USB connection, a power jack, an ICSP header, and a reset button.

Micro SD Card Module

• A module that allows micro SD cards to be read and written to via SPI.

RTC DS3231

• A highly accurate I2C real-time clock (RTC) with an integrated temperature-compensated crystal oscillator (TCXO) and crystal.

Solar Panel

• A photovoltaic panel designed to absorb the sun's rays as a source of energy for generating electricity.

INA219

• A high-side current shunt and power monitor with an I2C interface.

Resistor

• A passive two-terminal electrical component that implements electrical resistance as a circuit element. This particular resistor has a resistance of 20 Ohms.

Wiring Details

Arduino UNO

• A4 (SDA) connected to the SDA line shared with INA219 and RTC DS3231 for I2C communication.
• A5 (SCL) connected to the SCL line shared with INA219 and RTC DS3231 for I2C communication.
• Vin connected to the VCC lines of INA219, Micro SD Card Module, and RTC DS3231.
• GND connected to the common ground network.
• D13 connected to the sck pin of the Micro SD Card Module for SPI communication.
• D12 connected to the miso pin of the Micro SD Card Module for SPI communication.
• D11 connected to the mosi pin of the Micro SD Card Module for SPI communication.
• D10 connected to the cs pin of the Micro SD Card Module for SPI communication.

Micro SD Card Module

• vcc connected to the VCC network.
• gnd connected to the common ground network.
• cs connected to D10 on the Arduino UNO.
• sck connected to D13 on the Arduino UNO.
• mosi connected to D11 on the Arduino UNO.
• miso connected to D12 on the Arduino UNO.

RTC DS3231

• VCC connected to the VCC network.
• GND connected to the common ground network.
• SCL connected to A5 (SCL) on the Arduino UNO.
• SDA connected to A4 (SDA) on the Arduino UNO.

Solar Panel

• + connected to Vin+ on the INA219.
• - connected to the common ground network.

INA219

• Vin+ connected to the + of the Solar Panel.
• Vin- connected to pin2 of the Resistor.
• VCC connected to the VCC network.
• GND connected to the common ground network.
• Scl connected to A5 (SCL) on the Arduino UNO.
• Sda connected to A4 (SDA) on the Arduino UNO.

Resistor

• pin1 connected to the common ground network.
• pin2 connected to Vin- on the INA219.

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:

}

Additional Notes (documentation.txt)

No additional code documentation was provided for the Arduino UNO.