Sensors compatible with arduino

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Yasser
Posts: 7
Joined: Mon Oct 20, 2014 4:20 pm

Sensors compatible with arduino

Postby Yasser » Tue Oct 21, 2014 9:58 am

Dear All,

Which type of arduinos or microcontrollers support all of your sensors and are the most small and compact in size we can get. (This is for a wearable technology project). Each microcontroller would support one sensor and send its data through zigBee. Also, how would we know how many pins each sensor takes/needs?

Thanks in advance. :) :) :)

BITalino
Site Admin
Posts: 567
Joined: Tue Aug 27, 2013 3:47 pm

Re: Sensors compatible with arduino

Postby BITalino » Tue Oct 21, 2014 10:37 am

Yasser wrote:Dear All,

Which type of arduinos or microcontrollers support all of your sensors and are the most small and compact in size we can get. (This is for a wearable technology project). Each microcontroller would support one sensor and send its data through zigBee. Also, how would we know how many pins each sensor takes/needs?

Thanks in advance. :) :) :)


Hi,

Any system with analog inputs and (preferably) 3.3V operating voltage should do. Perhaps one of the smallest you'll find around is the Arduino Pro Mini, although we don't know the full IoT / micro controller boards ecosystem in detail.

Each sensor can take up to 4 pins, although you should be able to do the trick with only 3 (VCC, GND, SIGNAL); the 4th pin is used in sensors like the EMG and ECG for the mid-point voltage, however you can create that voltage on the sensor board with voltage divider based on through-hole resistors.

A couple of picture on how to create the mid-point voltage follow in attachment.

Best regards,
The BITalino Team
Attachments
ECG [back] copy.JPG
Onboard voltage divider [back]
ECG [back] copy.JPG (81.92 KiB) Viewed 2913 times
ECG [front] copy.JPG
Onboard voltage divider [front]
ECG [front] copy.JPG (92.13 KiB) Viewed 2913 times

Yasser
Posts: 7
Joined: Mon Oct 20, 2014 4:20 pm

Re: Sensors compatible with arduino

Postby Yasser » Tue Oct 21, 2014 10:58 am

Thanks a lot for your response.

I have another question, is it possible to send data from the sensor to the Xbee directly without using arduino and the Xbee shield?

BITalino
Site Admin
Posts: 567
Joined: Tue Aug 27, 2013 3:47 pm

Re: Sensors compatible with arduino

Postby BITalino » Tue Oct 21, 2014 12:56 pm

Yasser wrote:Thanks a lot for your response.

I have another question, is it possible to send data from the sensor to the Xbee directly without using arduino and the Xbee shield?


If your XBee module has an on-board Analog-to-Digital Converter (ADC) it should be possible yes. You need to confirm on the data sheet of the module, but these days its fairly common for them to have. Here's one such example: http://www.digi.com/pdf/ds_xbeemultipointmodules.pdf

Do keep us posted on the outputs of your project; we'd love to share them with the remaining BITalino user community.

Best regards,
The BITalino Team


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