Freelance help needed tonight - opAmp circuit / EKG

[Eric Skiff]

Hi all - Apologies for the late notice on this one, but I figured I'd toss it out in case anyone is free this evening.

I'm in need of an electronics expert to help build a simple 2 lead EKG circuit, to be used as part of an equine heart rate monitor. 

I have specialized electrodes for the purpose, and will be logging the data to an arduino, but I'm struggling to pull together a working circuit and could use some help diagnosing my issues and breadboarding a working solution. 

I've got an opAmp which may or may not be right for the purpose, but would really benefit from someone with more experience diving in with me!

$125/hr negotiable, on-site at NYC resistor tonight at 9pm is ideal :)

Thanks
Eric

--

Eric Skiff

Co-founder

http://TanookiLabs.com

Empowering Entrepreneurs through

Web & Mobile Product & Development

[raphael]

Here's approximately the right op-amp. What are you using? Any schematic?

Here's a promising schematic (just the "ECG amplifiers" section):
https://www.olimex.com/Products/Modules/Biofeedback/MOD-EKG/resources/MOD-EKG-schematic.pdf


another good amp:
http://www.digikey.com/product-detail/en/AD620ANZ/AD620ANZ-ND/750967


Or is this all too late?
-r

> --
> You received this message because you are subscribed to the Google
> Groups "NYCResistor:Microcontrollers" group.
> To unsubscribe from this group and stop receiving emails from it, send
> an email to nycresistormicrocon...@googlegroups.com
> <mailto:nycresistormicrocon...@googlegroups.com>.
> To post to this group, send email to
> nycresistormi...@googlegroups.com
> <mailto:nycresistormi...@googlegroups.com>.
> Visit this group at
> https://groups.google.com/group/nycresistormicrocontrollers.
> For more options, visit https://groups.google.com/d/optout.

[jpbar...@aol.com]

Hi Eric,

I think you you need an instrumentation amplifier with good filtering.  I recall an Open EEG site with schematics.  Of course EKG signals are of greater amplitude and thus easier to handle.  I recall EKG circuits also having a "right leg drive" output to help reduce noise.

Just some initial thoughts.

Joe

Sent from AOL Mobile Mail

--

You received this message because you are subscribed to the Google Groups "NYCResistor:Microcontrollers" group.

To unsubscribe from this group and stop receiving emails from it, send an email to nycresistormicrocon...@googlegroups.com.
To post to this group, send email to nycresistormi...@googlegroups.com.