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ChristophSchranz / ecg_via_raspberrypi

This repository helps you to set up your own ecg measurement with a raspberry pi
GNU General Public License v3.0
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Circuit #1

Closed Lumi3011 closed 6 years ago

Lumi3011 commented 6 years ago

Hello there,

Can you help me with the circuit, because the picture you have in project does not seem to be correct.

Thanks

ChristophSchranz commented 6 years ago

Hello Lumi, the circuit should work this way. However, as I want to keep it as simple as possible, I didn't use the offset potential of the IN126. There are two solutions for that:

  1. Switch the + and - electrodes to get the negated signal
  2. Put a potentiometer on this contact and set the offset level to get it work properly.

If that doesn't work, can you please describe the problem in detail.

ChristophSchranz commented 6 years ago

I've rebuilt the circuit board and you were right, the MCP3208 needs two connections to the ground. I commited the updated layout (https://github.com/ChristophSchranz/ecg_via_raspberrypi/commit/517865133a92bd77290136628bff4dbfcc6e3bf7)

Thank you for reporting the bug!