How can I make pulse oximeter?

[Chikyoung sung]

I am trying to make pulse oximetry using nRF51822. I would like to know, is there any application note or example source code?

[Einar Thorsrud]

Unfortunately there are no official pulse oximeter examples. I see a lot of hobbyist/DIY projects when googling, and I would assume that some of them may be relevant, though not nRF51 specific.