Problem In desinging Heart Beat sensor

[Sunil Kumar]

Sir,

 

I m trying to work on similar project where i need to measure heart beat of the patient using either IR or LDR methods 

 

i tried alot using 2-3 stages of amplification and low pass filters still was not able to suceed in this project

i m attaching a circuit diagram, I have tried with NSK LDR based sensor which is not working,

 

thanx in advance

with reagards

Heart beat sensor

[Jason Jordon]

Hi,

 

Let’s assume that the coding of the circuit is perfect. You can try attaching 100nF capacitors in parallel to the 680K resistors at the op-amps. Also, try playing with resistances in some circuit simulator.

[Sunil Kumar]

 

thanx for ur valuable reply………

I am trying on with ur correction,

I’ll let u know if i find solution

 

with regards,

Sunil Kumar S

 

[Author]

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