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DESCRIPTION:Pulse sensor is used to test the heart rate sensor, students, artists, athletes,  creators, games or mobile terminal developers can develop heart-related and  interactive works. Sensor can be worn on the finger or earlobe, can be connected  with Ard uino line ..

DESCRIPTION:1,An onboard chip NE5552, a single-channel signal output, the output is approximately fifty percent duty cycle square wave3, onboard adjustable resistance, adjust the output frequency can be controlled resistance4, on-board power indicator5, the working voltage: 5 ~ 1..

the scope of this module:1 is used as a square wave signal generator generates a square wave signal used for experimental development.2 to drive a stepper motor for generating a square wave drive signal.3 adjustable pulse generated for use by MCU.4 adjustable pulse generation, control circuitry asso..