Heart beat monitors LDR

Hello everyone.
I am building my first large project and the idea was to use a LDR and LED to measure the heart rate. But I am wondering, what kind of LDR have people used that worked? Any you recommend?

Thanks

Hi LoFu, In addition to whatever advice you get here, I would recommend a search in google for something like: LDR heart rate monitor :wink:

Have fun!