Heartbeat Detector Module

  • $2.45

Only 1 left! Ships from Auckland

This module contains a bright infrared LED and a phototransistor.  When you place your finger between the LED and phototransistor, the blood in your finger blocks some of the infrared light hitting the sensor, causing a slight change in the current through the phototransistor.

This current, when amplified and converted to a digital signal by a microcontroller, can be used to detect a human pulse.


  • It's important to shield other light sources from the phototransistor, otherwise the signal-to-noise ratio will be very low and a pulse may not be detected.
  • Making a working heartbeat detector from this module may be challenging so we would recommend only customers with good microcontroller and analog circuitry skills to purchase this product.


We Also Recommend