# Heart Rate Monitor Circuit - I Need Help.

#### EAEA93

Joined Jun 15, 2014
7
Hey, I'm a medical student that currently working on a project, but unfortunately I know little about electronics.
So can you guys help me with a circuit where the input is the heart rate (from a clip on a finger) and it gets activated when the pulse is diminished (when the pulse is normal it does nothing).
I'd be really happy if you could help me.
Thank you.

#### wakibaki

Joined Jun 12, 2012
7
What do you mean, 'diminished'? Do you mean slow or weak?

If you were going to be my doctor, I'd really prefer you learned to express yourself a bit more precisely.

w

#### absf

Joined Dec 29, 2010
1,949
Last edited:

#### paulktreg

Joined Jun 2, 2008
795
Is this something you have to build from scratch or can you use pre-assembled modules?

(If he comes back).

Last edited:

#### Alec_t

Joined Sep 17, 2013
11,886
How do you define a 'normal' pulse?

#### EAEA93

Joined Jun 15, 2014
7
What do you mean, 'diminished'? Do you mean slow or weak?

If you were going to be my doctor, I'd really prefer you learned to express yourself a bit more precisely.

w
Hey,
let me rephrase it, if the device detect any pulse this is considered normal no matter whats the rate, it only gets activated when there is no pulse at all.

#### EAEA93

Joined Jun 15, 2014
7
May be he want to detect if the patient is still alive or dead.

Just kidding.

Is this similar to what you're looking for?

Sparkfun makes a pulse monitor and the interface that monitors heart beats.

https://www.sparkfun.com/products/11574 pulse monitor

http://danjuliodesigns.com/sparkfun/sparkfun.html heart rate monitor interface.

Allen
Actually you are right

Thank you so much for the links, I appreciate it.

#### EAEA93

Joined Jun 15, 2014
7
Is this something you have to build from scratch or can you use pre-assembled modules?

(If he comes back).
It's okay if I use pre-assembled modules. Any ideas?

#### EAEA93

Joined Jun 15, 2014
7
How do you define a 'normal' pulse?
Any pulse that is detected would be considered normal (despite the rate), abnormal pulse = no pulse at all.

#### ScottWang

Joined Aug 23, 2012
6,988