Please see the updated version of this project here:
http://embedded-lab.com/blog/?p=5508
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Comment: Here's a revision of this project: http://embedded-lab.com/blog/?p=7336
Comment: Hi Phil, Here's a new look of this pulse meter. I just finished writing about it on my …
Comment: Thank you!
Comment: I put the sensor inside the meter because I want to use it as a standalone temperature …
Comment: LM741 won't be a good choice for this project.