Misc. DIY 'ECG' Machine: Testing Feasibility of Wave Transference

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The discussion centers on the feasibility of creating a DIY 'ECG' machine that mechanically records heartbeats on paper. The proposed design involves using a funnel and a tube to detect chest movements caused by heartbeats, but concerns are raised about the minimal movement of the chest and the effectiveness of the chosen materials for wave transmission. Suggestions include using a blood pressure cuff to enhance signal detection and exploring alternative recording methods, such as a mechanical probe over the radial artery to capture pulse movements more effectively. The conversation also touches on the importance of impedance matching in the design and the potential for using hydraulic systems for better performance. Overall, the project faces challenges in accurately capturing and recording heart activity mechanically.
  • #31
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Aha it was the low battery tank warning causing the error.

I was just kidding about spending too much time "resting on PF".

or was I. ;) The %O2 error depends on the accuracy of the constant current regulator at low voltage and how that affects the amplitude and ratios of IR / R or is it R/IR, light detected. I forget.
 
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  • #32
An off-topic discussion about Traditional Chinese Medicine has been deleted. Since we have addressed the OP's questions and they haven't been back in several weeks, the thread will be closed now. Thank you to all for your contributions and ideas for the OP.
 
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