VernierHeartRateReceiver

Forum 2005-2010 (read only) Hardware Interfacing
1

Hello,

Hope you are all well.

Any one knows if it is possible and how to connect the vernier heart receiver (vernier.com/accessories/access.html?hr-rec&template=basic.html) to an arduino board?

Thanks,

André

2

Hi Richard,

Thank you!

I did not find documentation about the receiver but I don't mind to chop the connector. But am not sure what to do with the chopped wires... I suppose that 2 or 3 should connect to arduino like to 5v, grnd, and analog pin or 5v and analog pin or just to an analog pin. I really don't know.

Any advice is welcome!!

Greetings

3

Hello Andre,

Thank you for your email.

I see what you want to do, and the Hand-grip heart rate monitor ought to do your job for you.

AS I have not used this exact sensor my advice must be general. BUT I think I can help you here.

First you should download the Vernier LabPro technical manual.

http://www2.vernier.com/labpro/labpro_tech_manual.pdf

On page 73 there is the section "LabPro Hardware Connector Pinouts"

I am almost certain that the output of the device is semi-digital, but delivered over pin 6 as an analog output voltage.

This means that you get a 3V positive going spike when a QRS is detected. Vernier has chosen to keep this as an analog signal, but for your purposes it will fit well into the digital domain.

This means that you should cut off the LabPro plug from the sensor (give maybe 100mm of tail so you can use it to identify wire colour. You need Pin 2 (GND), Pin 5 (+5VDC), and Pin 6 (QRS sense out).

You will connect them to Arduino GND and +5V. The QRS sense out (Pin 6) you connect in the first instance to a DIGITAL pin, preferably INT0 or INT1 (physical pins 2 or 3). This saves you doing an A-D conversion on the pin, and lets you do interrupt based programming to do your "change installation now".

Hope this helps. If you have any hassles, let me know.

Regards,
TB

4

Dear Tony

Thank you very much for your precious guidance. I hope I can some when return in a situation you might need. When I receive the sensor and when I start getting some data from it (I hope without hassles), I will let you know.

Wish you the best!,

André