Hi, I am brand new to this world and am having trouble with my heartrate sensor. I would very much appreciate some help.
I have been following a tutorial but cannot get power 
These are my connections
VIN - 5V
SDA - A4
SCL - A5
GND - GND
I am using the library and example code from sparkfun (GitHub - sparkfun/SparkFun_MAX3010x_Sensor_Library: An Arduino Library for the MAX3015 particle sensor and MAX30102 Pulse Ox sensor)
/*
 Heart beat plotting!
 By: Nathan Seidle @ SparkFun Electronics
 Date: October 20th, 2016
 https://github.com/sparkfun/MAX30105_Breakout
 Shows the user's heart beat on Arduino's serial plotter
 Instructions:
 1) Load code onto Redboard
 2) Attach sensor to your finger with a rubber band (see below)
 3) Open Tools->'Serial Plotter'
 4) Make sure the drop down is set to 115200 baud
 5) Checkout the blips!
 6) Feel the pulse on your neck and watch it mimic the blips
 It is best to attach the sensor to your finger using a rubber band or other tightening
 device. Humans are generally bad at applying constant pressure to a thing. When you
 press your finger against the sensor it varies enough to cause the blood in your
 finger to flow differently which causes the sensor readings to go wonky.
 Hardware Connections (Breakoutboard to Arduino):
 -5V = 5V (3.3V is allowed)
 -GND = GND
 -SDA = A4 (or SDA)
 -SCL = A5 (or SCL)
 -INT = Not connected
 The MAX30105 Breakout can handle 5V or 3.3V I2C logic. We recommend powering the board with 5V
 but it will also run at 3.3V.
*/
#include <Wire.h>
#include "MAX30105.h"
MAX30105 particleSensor;
void setup()
{
 Serial.begin(115200);
 Serial.println("Initializing...");
 // Initialize sensor
 if (!particleSensor.begin(Wire, I2C_SPEED_FAST)) //Use default I2C port, 400kHz speed
 {
  Serial.println("MAX30105 was not found. Please check wiring/power. ");
  while (1);
 }
 //Setup to sense a nice looking saw tooth on the plotter
 byte ledBrightness = 0x1F; //Options: 0=Off to 255=50mA
 byte sampleAverage = 8; //Options: 1, 2, 4, 8, 16, 32
 byte ledMode = 3; //Options: 1 = Red only, 2 = Red + IR, 3 = Red + IR + Green
 int sampleRate = 100; //Options: 50, 100, 200, 400, 800, 1000, 1600, 3200
 int pulseWidth = 411; //Options: 69, 118, 215, 411
 int adcRange = 4096; //Options: 2048, 4096, 8192, 16384
 particleSensor.setup(ledBrightness, sampleAverage, ledMode, sampleRate, pulseWidth, adcRange); //Configure sensor with these settings
 //Arduino plotter auto-scales annoyingly. To get around this, pre-populate
 //the plotter with 500 of an average reading from the sensor
 //Take an average of IR readings at power up
 const byte avgAmount = 64;
 long baseValue = 0;
 for (byte x = 0 ; x < avgAmount ; x++)
 {
  baseValue += particleSensor.getIR(); //Read the IR value
 }
 baseValue /= avgAmount;
 //Pre-populate the plotter so that the Y scale is close to IR values
 for (int x = 0 ; x < 500 ; x++)
  Serial.println(baseValue);
}
void loop()
{
 Serial.println(particleSensor.getIR()); //Send raw data to plotter
}
Please help! Any insight would be much appreciated!