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Topic: Signal amplifier circuit (Read 2 times) previous topic - next topic

CasNet

Quote

Hi guys

I need to build an amplifier to increase the signal from a photo diode like here
http://www.picotech.com/experiments/calculating_heart_rate/index.html

I'm not that good at reading circuit diagrams yet, plus think there is a simpler way of doing it than this.

Anyone got any tips / resources?

Thanks


Actually if the bandpass filter and the gain of 10,000 are both important to you this is a pretty minimalist circuit.

Regards,
David

chris



I am having trouble finding a UK supplier for an OPT101.

I think I found one on Farnell
http://uk.farnell.com/jsp/endecaSearch/partDetail.jsp?SKU=558965

But then it looks completely different to the one on Ebay US, so I dont think its correct.
http://www.sage.lunarpages.net/wfc/DIopt101.jpg

Any thoughts?

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