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Topic: Pulse meter schematic (Read 864 times) previous topic - next topic

cracklings1017

Hello guys!

Can someone figure this out: http://code.google.com/p/pulsometer/

I am having doubts on the 0.1F below the 487k resistor on the schematic.

Is that electrolytic or a ceramic? or is it 0.1uF?
just to big value for a pulse monitor. The maker is not replying for my comments, need some help guys.
I'm really a noob in electronics. =(

Thanks in advance!
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Nick Gammon

Don't cross-post please. Your other post has been deleted.

Just ask once.
http://www.gammon.com.au/electronics

cracklings1017


Don't cross-post please. Your other post has been deleted.

Just ask once.

ok sir Gammon and sorry.
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michael_x

It's rather 0.1 µF = 100 nF.

R*C of R1*C1 should be in the same range as R3*C2 ( giving you a gain of about 10 ).

And I bet R1 = 470k (if you have it available anyway) would work the same as the proposed 487k

cracklings1017


It's rather 0.1 µF = 100 nF.

R*C of R1*C1 should be in the same range as R3*C2 ( giving you a gain of about 10 ).

And I bet R1 = 470k (if you have it available anyway) would work the same as the proposed 487k

Thanks sir...
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