nice tech !
For uECG - small open source wireless ECG sensor
In short great work I'm impressed, still reading your https://hackaday.io/project/164486-uecg-a-very-small-wearable-ecg
maybe add an optical sensor that illuminates the sternum blood vessels ?
( to measure Respiratory rate, Heart rate, Oxygen saturation )
I'm interested in how to program the nRF52832 and how to work with pcbway
Response from Ultimate Robotics | Jan. 19, 2022
Wow, thanks for the review! We're so glad you liked it!
About the optical sensor: that's a great idea, we think about that from time to time. We have some ideas about doing several different versions of uECGs for different purposes, still not sure if we'll do that, but we'll certainly consider the optical sensor, because (like you said) this would give lots of new data.
About programming nRF52832: do you mean the tools? We use STLink with openocd on Linux.
On working with PCBWay: that's actually pretty easy, because they have a lot of the process automated - like choosing the parameters of PCB/PCBA (assembly), uploading gerbers and BOM. After that, they answer you with a quote and some questions if they have them, and then you pay for the order. That's for PCBA, PCB orders are done without discussion normally.
The real work if you're looking for PCBA is preparing the BOM, like making a really detailed one, filling all the P/Ns and descriptions and making sure they can buy these P/Ns easily (you can check on LCSC, even better to fill LCSC product links in BOM). And communication is important too, keeping it short and using direct, simple English helps a lot. You can also provide them with stuff like pictures of LED polarity (we like to do that every time, especially for RGBs). Best to start with PCB without PCBA if you're new to this. But if you have low component count in BOM, maybe you can try PCBA at once. Good luck!
P.S. Sorry for slow answer, we're taking a small break in January
