confiusing

hello guys…can anyone help me…i want to ask…is it possible to make oxygen saturation and measure heartbeat by using IR transmitter and receiver without Red Led…anyone have done it before?

can i have the circuit or coding…i am using this circuit

wew.png

Without a red LED? Hmmmm. Not sure.

I cannot help with your question, but might help getting you an answer.

http://forum.arduino.cc/index.php/topic,148850.0.html

read #6

ask there. what you have now is not drawing people to this thread.