Description

Pulse Sensor Amped is a plug-and-play heart-rate sensor for Arduino and Arduino compatibles. It can be used by students, artists, athletes, makers, and game & mobile developers who want to easily incorporate live heart-rate data into their projects. Pulse Sensor adds amplification and noise cancellation circuitry to the hardware. It's noticeably faster and easier to get reliable pulse readings. Pulse Sensor Amped works with either a 3V or 5V Arduino.

Specification

Diameter = 0.625" (~16mm)
Overall thickness = 0.125" (~3mm)
Working Voltage = 3V to 5V
Working Current = ~4mA at 5V

Step 1: Material Preparation

In this tutorial , you will need :

1. Arduino Uno Board and USB Cable.
2. Pulse Sensor Arduino
3. Jumper Wires
4. LCD
5. Potentiometer 10K
6. 2 LEDs
7. Breadboard

Step 2: Pinout Details

you can see the s, + and - on pulse sensor's back view as shown in the picture above.

S : signal, connected to any of your microcontroller's digital pin.
+ : supply, 3V up to 5V
- : ground

Step 3: Pin Connection

1. Connect Pulse Sensor to Arduino Uno Board as following :

+ to +5V
- to GND
S tO A0

2. Connect LCD to Arduino Uno Board as following :

VSS to +5V
VDD to GND
RS to 12
RW to GND
E to D11
D4 to D5
D5 to D4
D6 to D3
D7 to D2
A/VSS to +5V
K/VDD to GND

3. Connect 10K Potentiometer to LCD as following (refer image for potentiometer pinout) :

GND to GND
Data to v0
VCC to +5V

4. Connect LED to Arduino as following :

LED1 (RED, blinkPin) to D13
LED2 (GREEN, fadeRate) to D8

Step 4: Connect to Your Computer

After u have completed your circuit, connect your Arduino Uno Board to your computer via USB Cable. You can see your LCD is on.

Step 5: Library

You have to download this library before uploading the sample source code into your Arduino IDE to allow Arduino to communicate with LCD. Download the ZIP file below > Open Zip File > Extract to your Arduino Uno Library folder.

LiquidCrystal.rar
Download

Step 6: Sample Source Code

You may download this sample source code and open it on your Arduino IDE. Choose the correct board and port. Then, upload your Code into your Arduino Uno Board.

NOTE : DO NOT connect the Pulse Sensor to your body while your computer or arduino is being powered from the mains AC line. That goes for charging laptops and DC power supplies.

pulse_sensor.rar
Download

Step 7: Serial Monitor

when you open your serial monitor, make sure you change your baud rate to 115200, it has to match to the baud rate stated in the sample source code.

Step 8: Result

After it’s done uploading, you should see LED1 (red) blink in time with your heartbeat when you place your finger on the sensor. If you grip the sensor too hard, you will squeeze all the blood out of your fingertip and there will be no signal! If you hold it too lightly, you will invite noise from movement and ambient light. So, place your finger on the sensor lightly till you get a read on the LCD or serial monitor that shows signal is already transmitted. You will be able to get the reading on both serial monitor and LCD.

Step 9: Video

This video shows how pulse sensor work by displaying the BPM value on LCD.

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32 Comments

chiragchauhan

1 year ago

Please correct LCD connections. VSS should be connected to ground and VDD to +5V

arunkchandramohan12

Question 1 year ago on Step 2

I did this project without an lcd display; it worked. But the values that appears on the serial monitor seems to be too big otherwise it's doing ok....

haseeb abbasi

2 years ago

from where we can get the code.

biomurph

2 years ago

Hi,
It's been a while since this post went up.
I make Pulse Sensor www.pulsesensor.com and you bought a ripoff clone of my work. Don't trust it. Please support the original makers of Open Source Hardware and buy only legit products!