Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes an ESP32 Wroom Dev Kit, an AD8232 Heart Rate Monitor, a MAX30100 sensor, and a 2x 18650 battery pack. The circuit is designed to monitor heart rate and other vital signs using the sensors, with the ESP32 serving as the central microcontroller to process and transmit the data.

Component List

1. ESP32 Wroom Dev Kit

   • Description: A powerful microcontroller with built-in Wi-Fi and Bluetooth capabilities.
   • Pins: 3V3, EN, VP, VN, GPIO 34, GPIO 35, GPIO 32, GPIO 33, GPIO 25, GPIO 26, GPIO 27, GPIO 14, GND, GPIO 13, SD2, SD3, CMD, V5, GPIO 23, GPIO 22, TXD, RXD, GPIO 21, GPIO 19, GPIO 18, GPIO 5, GPIO 17, GPIO 16, GPIO 4, GPIO 0, GPIO 2, GPIO 15, SD1, SD0, CLK

2. AD8232 Heart Rate Monitor

   • Description: A sensor module used to measure the electrical activity of the heart.
   • Pins: GND, 3.3v, OUTPUT, LO-, LO+, SDN, RA, LA, RL

3. MAX30100

   • Description: A pulse oximeter and heart-rate sensor.
   • Pins: Vin, gnd, scl, sda, int

4. 2x 18650 Battery Pack

   • Description: A battery pack consisting of two 18650 lithium-ion cells.
   • Pins: vcc, gnd

Wiring Details

ESP32 Wroom Dev Kit

• 3V3 connected to:

  • MAX30100 Vin
  • AD8232 Heart Rate Monitor 3.3v
  • 2x 18650 Battery Pack vcc

• GND connected to:

  • MAX30100 gnd
  • AD8232 Heart Rate Monitor GND
  • 2x 18650 Battery Pack gnd

• GPIO 34 connected to:

  • AD8232 Heart Rate Monitor OUTPUT

• GPIO 22 connected to:

  • MAX30100 scl

• GPIO 21 connected to:

  • MAX30100 sda

AD8232 Heart Rate Monitor

• 3.3v connected to:

  • ESP32 Wroom Dev Kit 3V3
  • 2x 18650 Battery Pack vcc

• GND connected to:

  • ESP32 Wroom Dev Kit GND
  • MAX30100 gnd
  • 2x 18650 Battery Pack gnd

• OUTPUT connected to:

  • ESP32 Wroom Dev Kit GPIO 34

MAX30100

• Vin connected to:

  • ESP32 Wroom Dev Kit 3V3
  • AD8232 Heart Rate Monitor 3.3v
  • 2x 18650 Battery Pack vcc

• gnd connected to:

  • ESP32 Wroom Dev Kit GND
  • AD8232 Heart Rate Monitor GND
  • 2x 18650 Battery Pack gnd

• scl connected to:

  • ESP32 Wroom Dev Kit GPIO 22

• sda connected to:

  • ESP32 Wroom Dev Kit GPIO 21

2x 18650 Battery Pack

• vcc connected to:

  • ESP32 Wroom Dev Kit 3V3
  • AD8232 Heart Rate Monitor 3.3v
  • MAX30100 Vin

• gnd connected to:

  • ESP32 Wroom Dev Kit GND
  • AD8232 Heart Rate Monitor GND
  • MAX30100 gnd

Code

No code is provided for this circuit.

---

This document provides a comprehensive overview of the circuit, including a summary, component list, wiring details, and code documentation. This should serve as a useful reference for understanding and replicating the circuit.