Circuit Documentation

Summary of the Circuit

This circuit appears to be designed for voltage monitoring and control applications. It includes a precision voltage reference (LM4040), a high-side current and power monitor (INA228), an Arduino UNO microcontroller for control and data processing, a 18650 Li-ion battery as a power source, a rotary potentiometer for adjustable input, and a resistor for current limiting or voltage division.

Component List

LM4040 - Precision Voltage Reference

• Pins: Vin, GND, 2.048V, 4.096V
• Description: Provides precise voltage references of 2.048V and 4.096V for analog-to-digital conversions or as a reference voltage for other components.

INA228 - High-Side Measurement, Bi-Directional Current/Power Monitor with I2C Interface

• Pins: Vin, GND, SCL, SDA, VBUS, VIN-, VIN+, ALRT, Vin-, Vin+
• Description: Monitors voltage, current, and power on a high-side configuration with an I2C interface for communication with microcontrollers.

Arduino UNO - Microcontroller Board

• Pins: UNUSED, IOREF, Reset, 3.3V, 5V, GND, Vin, A0-A5, SCL, SDA, AREF, D0-D13
• Description: A versatile microcontroller board based on the ATmega328P, used for controlling the logic of the circuit and processing data from sensors.

18650 Li-ion Battery - Power Source

• Pins: -, +
• Description: Provides power to the circuit. It is a rechargeable battery commonly used in portable electronics.

Rotary Potentiometer - Variable Resistor

• Pins: leg1, wiper, leg2
• Description: A three-terminal resistor with an adjustable knob that can be used to adjust the level of input voltage or current.
• Properties: Resistance - 10,000 Ohms

Resistor - Fixed Resistor

• Pins: pin1, pin2
• Description: A passive two-terminal electrical component that implements electrical resistance as a circuit element.
• Properties: Resistance - 40 Ohms

Wiring Details

LM4040 - Precision Voltage Reference

• Vin: Connected to Arduino UNO 5V
• GND: Connected to Arduino UNO GND
• 4.096: Connected to Arduino UNO AREF

INA228 - High-Side Measurement, Bi-Directional Current/Power Monitor with I2C Interface

• Vin: Connected to Arduino UNO 5V
• GND: Connected to Arduino UNO GND
• SCL: Connected to Arduino UNO A5
• SDA: Connected to Arduino UNO A4
• Vin-: Connected to Rotary Potentiometer wiper and Resistor pin1
• Vin+: Connected to 18650 Li-ion Battery + and Resistor pin2

Arduino UNO - Microcontroller Board

• 5V: Provides power to LM4040 and INA228
• GND: Common ground for the circuit
• A4 (SDA): I2C data line connected to INA228 SDA
• A5 (SCL): I2C clock line connected to INA228 SCL
• AREF: Reference voltage input connected to LM4040 4.096V

18650 Li-ion Battery - Power Source

• +: Connected to INA228 Vin+ and Resistor pin2
• -: Connected to Arduino UNO GND

Rotary Potentiometer - Variable Resistor

• leg1: Connected to Arduino UNO GND
• wiper: Connected to INA228 Vin- and Resistor pin1

Resistor - Fixed Resistor

• pin1: Connected to Rotary Potentiometer wiper and INA228 Vin-
• pin2: Connected to 18650 Li-ion Battery + and INA228 Vin+

Documented Code

Arduino UNO Microcontroller Code (sketch.ino)

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

}

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

}

Note: The provided code is a template and does not include specific functionality. It should be populated with setup configurations and operational code to interact with the INA228 and other components as required by the application.