I would like to ask for any input or suggestions in setting up a health monitoring device with DSP. Our design is focused on heart rate and respiratory rate. Our mentor tasked us to revise our research, from a strapped health monitoring device to a DSP and contactless (if possible) device. I was eyeing the MAXREFDES220, but it's too pricey for a student. Initially, we considered building our prototype using Adafruit Metro and Arduino tools (relatively affordable), but after revisions, we were somewhat back from scratch. Additionally, we are not that knowledgeable about DSP.
Any leads would be great, thanks!