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Help me build a heart beat sensor. Urgent

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luap5002000

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I am working on a heartbeat sensor. And I am having difficulties with the sensor chamber using an LDR and a LED. The schematic is the usual one we have seen, but here is is again. Any other schematic and guidance will be appreciated. Thanks

PAUL.[/b]
 

Audioguru

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That is the well-known HeMon project.
What problem do you have with it?

The project (look for it in Google) has photos of the LDR/LED part.

Oh. Nigeria? Black skin? Does an LED shine through black skin?
 

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