HiLetgo 5pcs 5V Heartbeat Detect Sensor Heart Rate Detect Measuring Module Measure Finger bee05 Colors and decorations may vary

Colors and decorations may vary

can be applied in bowling alley

Sufix Superior Leader 110-Yards Leader Wheel Fishing Line (Clear

well made workmanship --Our Product Line-- Our product include ballet leotard

We use 3pcs steel safety buckles to ensure the safety

HiLetgo 5pcs 5V Heartbeat Detect Sensor Heart Rate Detect Measuring Module Measure Finger bee05 Colors and decorations may varyHiLetgo 5pcs 5V Heartbeat Detect Sensor Heart Rate Detect Measuring Module Measure Finger Description: Finger heartbeat measurement module arduino test code: INT led Pin=13; INT sensor Pin=0; Double alpha=0. 75; INT period=20; Double change=0. 0; Void setup {Pin Mode (led Pin, OUTPUT)} void loop Static double old Change=0; INT raw Value=analog Read (sensor Pin); Double value=alphaold Value+(1 alpha)raw Value; Change=value old Value; Digital Write (led