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RoadTest Forum Review : Freescale RD3803MMA7660FC
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Review : Freescale RD3803MMA7660FC

firatkocak
firatkocak over 15 years ago
Physical View :

The unit came in a big box when compared to the very small device size. The box contains the device itself, a usb cable, an installation and documentation cd and other papers. It has very compact size. There are four plastic feeth.

Installation :

Installation is very easy. Just fallow the instructions located in the installation guide. First install the application and then connect the device to the usb port. While installing the device at work windows ( XP ) found a new driver so i needed to point the driver location to finish the driver installation. But at home, i did not face any "found a new driver" window, it was just installed.

When you use the autorun.exe to install the application, it runs, in fact, start.html. So you select whatever you want to install ( or view ). So when you want to install application and click on it, the archive file is being copied into your local drive. It would be better the application directly runs and installs whatever you want.

Documentation :

Documantations are well enough to understand how the device ( orientation and motion sensor ) works, what capabilities it has, what there are inside it and so on. But, while reading the device pin description, it can be seen that pin 1 is reserved and left unconnected or connected to ground, pin 10 is also not used and can be left unconnected but recommended to connect to ground. So, i expect to see, in the sample application schematics, especialy pin 10 to be tied to ground but it is left unconnected. If something is being recommendated then it should be used as recommendated.

There is also a video to explain how the device works. A woman speaks in the video and gives detailed information by using the application program. But the video is terrible( at least for me ). Video is not steady. I think someone took it with a handycam.In the meantime, the voice of the speaker is so much less that it can not be heard so much easily. I maximized the sound level of the windows media player and my speaker but no use.

Application :

The application is well enough to see how the device works. You can test every feature the device has. You turn it to the left and you see it on the screen. But to see the right orientation you should place the device in the right position. The sensore chip name is on the upper part of the sensor board and the freescale label is at the bottom. then you turen left you see left message, you turn right then you see right message and so on. But to test the shaking feature, you have to make a bit sudden movement. slow movement do not detect it.

And i could not see anyway to reprogram the mcu on the mother board to play with it. there is no any software development package in the cd. If it were, that would be great.

Conclusion :

I like it. I have always been interested in such kind of chips. I have a few projects in mind to give a life. Something finding approx slope of a subject such as a photo frame while trying to hang it on the wall image or maybe route tracking with a car by the help of a speed sensor. Just ideas... Are they realistic, we will see...


FIRAT KOCAK
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  • espanholito
    espanholito over 15 years ago

    Good review,

     

    I'm still waiting for my kit, in order to also review it.

     

    When I receive it I plan you mouniting it on a breadboard and try to do something with a PIC.

     

    As soon as I manage to use it whith the PIC i will post the code, for those who wich to play a bit with it.

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  • awinning
    awinning over 15 years ago
    Good review Firat, please keep us up to date with the further projects
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  • firatkocak
    firatkocak over 15 years ago in reply to awinning

    Hi Alistair,

     

    Sure i will. Having such a hardware has certainly created new ideas in my mind. I am currently busy next one or two weeks. But then i will be free enough to create a new project to test the hardware in real life environment. The hardware is a such device that finding a project is just a matter of imagination. I have a telescope with equatorial mount and tracking motors but it is not a good quality. I can test its quality and its tracking errors with this sensore hardware by connecting it to a small controller hardware by reading motor position.

     

    Anyway, i need some free time for all of those projects in my mind.

     

    Firat Kocak

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  • awinning
    awinning over 15 years ago in reply to firatkocak
    I'd love to see some images from your telescope. Feel free to post them here.
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  • firatkocak
    firatkocak over 15 years ago in reply to awinning

    Very nice of you image I will do it whenever i find a cam ( unfortunately lost mine some time ago ). Its brand is Konus ( Model, i think it was 1796 ) and its objective size is 130 mm, focal length is 2000 mm. I have been away from my telescope for a long time and i missed it so much. My biggest dream is to take pictures of double stars, galaxies and star clusters. A good quality camera for long exposures is expensive and difficult to find here. so i made a few webcam modifications to take pictures of the sky even if they would probably give dirty results. But the tracking equipment of the telescope is so much poor. I was thinking to change it with stepper motors ( capable of microstepping ) but i have been lack of free times to deal with it since then.

     

    Anyway, but i will post its pictures when i have a cam.

     

    Firat Kocak

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  • Pavel.Simon
    Pavel.Simon over 15 years ago

    Very good review, thank you.

    I got my last week, and before I tried it I read your review.

    I must fully agree, and at that time I do not have any comment to add.

    In few week I will try to do some SW application how to communicate with device, but it will take some time.

     

    Only when I opened, I was really surprised with dimensions of chip itself, it is beautifully small.

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