Lilypad accelerometer

Forum 2005-2010 (read only) General Frequently-Asked Questions
1

Hi,

I need LilyPad accelerometer for motion sensing. I just need raw data to go to my pc directly, and then I want to interpret the data. Is it possible? I don't have powerful background in electronics, is it easy to do?

when it says it is washable, does it mean that people can take shower with it?

And for a rate of 3 samples per second, how many days can the battery work?

thanks,

2

dunno bout the battery... but yes the accelerometer is just like any other accelerometer, so it is possible to draw data from it directly into a pc...

and if you wanna take a shower in it, you'll ahve to take out the battery (or unplug it from the wall socket/pc/whatever... basically, no power source)

3

Thanks so much.

Does anyone know the battery life? Just an estimation is enough.

Thanks,

4

What battery do you use?

5

I don't know. The battery that lilypad works with it.

6

I know of two which are sold, the lipo and the AAA battery packs... does yours look like a AAA?

7

I haven't bought it yet. So I don't know with what kind does it work.

What was the battery life of the one you have seen?

8

And, what should I do for trasfering the data to my pc? Any programing is needed?

thanks,

9

the actual arduino software has a sketch that will do exactly that:
File->Sketchbook->Examples->Sensors->ADXL3xx
reading data from an accelerometer and sends it back to the pc over serial. if you want to do that with wireless communication you have to ask someone else ^^

if you want to work with the data you can look here: Arduino Playground - InterfacingWithSoftware
or look at the examples here: Serial - Arduino Reference

10

Thanks,

Yes, I need to transfer data to my pc with wireless communication. Any idea?

11

how about this little thing: http://www.sparkfun.com/commerce/product_info.php?products_id=8937

anyway range is limited and i don't think you will allways be within range so...wouldn't it be better to save the data on an sd-card?

12

Ok, How can I save it on a sd-card? does it have a memory card with it?
power supply is not in the accelerometer?

Thanks,

13

lilypad and the accelerometer don't have interfaces for sd memorycards. but you can look here Arduino Playground - SDMMC. anyway i never worked with sdcards so i have no detailed informations, all i know is that its possible ^^

there isn't a buildin powersupply in the accelerometer but accelerometers don't need that much power my ADXL330 runs on 2,0 V min and 3,6v max the lilypad needs 2.7-5.5 V you can run booth on the same powersupply as long its within range. or you can power the accelerometer from one of the digital outputpins.