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Interfacing 1$ Heart Pulse / Beat sensor AMPED SEN 11574 with Arduino


              Hello, and welcome to this tutorial where we try to use a 1$ Heart pulse sensor, which obviously won’t be so accurate, the genuine on is made by “World Famous Electronics llc” and you can visit their website where you can buy it for around 25$ and it’s sold with different accessories to hold it in your finger, you can also find it in Sparkfun for the same price, but the one I’m using is a 1$ cheapo version.




            This sensor is very easy to use, wire it with your board and here we go, there are also some useful codes in the sensor library.

            The optical system for heart beat measure consists of  a LED that glow on the basis of light on the skin and a photodiode that receives the reflected light, and everytime there’s a blood flow the light received by the photodiode changes value, and this signal should be clean from noises and amplified so it’s easy to detect… But for a cheap one the two lasts operations are quiet dodgy …



       The first wiring is simple I just add a resistor + LED on pin13 which is the pin for the internal LED, the module has 3 wires (The genuine version has Black/Red/Purple for GND – /VCC + /Signal S … The cheapo versions can have 3 random colors just read the pins on the back)


In the second wiring I add a buzzer on pin 12 you can check the tutorial for how to use a buzzer also it include a song.



Download the library from Github here


The codes I’ve used are from the library: “Getting started” and “BPM” and are good for interfacing your module and understand how it works.

Unfortunately the module wasn’t working good to try BPM and other codes 🙁

And here’s the code I’ve used with the Buzzer, they have another one in examples, but I modified mine, don’t forget to watch the tutorial video in case you want to know why it’s difficult to measure my heart beat by this dodgy version.

Yassine View All

Automation and Electrical Engineer, Electronics amateur trying to share my little projects.

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