Circuit Documentation

Summary

The circuit in question is designed around an Arduino Pro Mini microcontroller and includes a variety of sensors and a display module. The circuit is powered by a 3.7v LiPo battery and is capable of reading heart pulse signals and temperature data, which can be displayed on a 0.96" OLED screen. The Arduino Pro Mini serves as the central processing unit, interfacing with the Heart Pulse Sensor and mlx90614 temperature sensor via analog and I2C communication, respectively. The OLED display also communicates with the Arduino via I2C. The circuit is designed for low power consumption, suitable for wearable or portable applications.

Component List

Arduino Pro Mini

• Microcontroller board based on the ATmega328
• Operating Voltage: 3.3V or 5V (depending on the model)
• Digital I/O Pins: 14 (of which 6 provide PWM output)
• Analog Input Pins: 8
• Clock Speed: 8 MHz or 16 MHz

0.96" OLED

• Small OLED display for visual output
• Communication: I2C
• Operating Voltage: Typically 3.3V to 5V

Heart Pulse Sensor

• Sensor for detecting heartbeats
• Operating Voltage: Typically 3.3V to 5V
• Output: Analog signal corresponding to heart pulse

mlx90614

• Infrared thermometer for non-contact temperature measurements
• Communication: I2C
• Operating Voltage: Typically 3.3V to 5V

3.7v LiPo Battery

• Rechargeable lithium polymer battery
• Nominal Voltage: 3.7V
• Used as the power source for the circuit

Wiring Details

Arduino Pro Mini

• VCC connected to the VCC of Heart Pulse Sensor, VIN of mlx90614, and VDD of OLED
• GND connected to the GND of all components and the negative terminal of the LiPo battery
• A4 (SDA) connected to SDA of mlx90614 and SDA of OLED for I2C communication
• A5 (SCL) connected to SCL of mlx90614 and SCK of OLED for I2C communication
• RAW connected to the positive terminal of the LiPo battery for power
• A0 connected to the SIGNAL of the Heart Pulse Sensor for reading pulse data

0.96" OLED

• GND connected to the GND of Arduino Pro Mini
• VDD connected to the VCC of Arduino Pro Mini
• SCK connected to A5 (SCL) of Arduino Pro Mini
• SDA connected to A4 (SDA) of Arduino Pro Mini

Heart Pulse Sensor

• GND connected to the GND of Arduino Pro Mini
• VCC connected to the VCC of Arduino Pro Mini
• SIGNAL connected to A0 of Arduino Pro Mini

mlx90614

• GND connected to the GND of Arduino Pro Mini
• VIN connected to the VCC of Arduino Pro Mini
• SCL connected to A5 (SCL) of Arduino Pro Mini
• SDA connected to A4 (SDA) of Arduino Pro Mini

3.7v LiPo Battery

• GND connected to the GND of Arduino Pro Mini
• +Ve connected to the RAW of Arduino Pro Mini

Documented Code

Arduino Pro Mini (sketch.ino)

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

}

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

}

Additional Notes

• The provided code is a template and does not include specific functionality. It needs to be populated with the initialization and operational code for the sensors and display.
• The setup() function is used for initializing settings, pin modes, and starting communication protocols.
• The loop() function will contain the main logic for reading sensor data, processing it, and displaying it on the OLED screen.
• I2C communication is set up on pins A4 (SDA) and A5 (SCL) for the mlx90614 and OLED display.
• Analog readings from the Heart Pulse Sensor are taken from pin A0.

This documentation provides an overview of the circuit, including the components used, their wiring, and a basic code structure for the Arduino Pro Mini. Further development of the code is required to achieve the desired functionality.