i recently bought me an pulse-heartbeat sensor. Connected him to my brand new M1 mini as well.
I wrote a piece of Code which just outputs the Raw ADC Value from A0 (where the pulse sensor is connected).
Now I'm confused.. When i open Serial Plotter, i get this:
Which is confusing because i don't get useable Values when putting the sensor up side down, which is the promoted way to do this (i guess!!)
When i press the other side against my wrist, i get this:
Which i can work with..
But it still doesnt look like some of those perfect diagrams on the internet.
Any can help me understand why i get this type of behaviour?
thanks, nice friday , luca