Description

Specification Details
Sensing principle Photoplethysmography (PPG), using an LED and light detector
Supply voltage Typically 3–5 V DC
Current consumption Approximately 4 mA at 5 V for the reference design
Output Analog pulse waveform
Interface Microcontroller ADC input
Connections VCC, GND and signal; verify pin order on the board
Signal conditioning Amplification and filtering
Measurement location Fingertip or earlobe
Heart-rate calculation Software calculates beats per minute from the waveform
BPM range and accuracy Not verified for the pictured board
Multiple readings Continuous waveform acquisition
Mounting Compact circular PCB with three-pin header
Applications Educational pulse monitoring, biofeedback experiments and interactive projects