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Thread: build my own basic atom pro 28 carrier board

  1. #11

    Re: build my own basic atom pro 28 carrier board

    The pins are connected to Vcc through a pull-up resistor. A pull-up resistor is used to hold the line high during an idle state.
    Last edited by MikeG; 03-15-2010 at 06:45 PM.

  2. #12
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    Re: build my own basic atom pro 28 carrier board

    I made my own board for a SMD version of the ATmega 328 (for a mini-sumo) and a carrier for an atmega 168 (which wasn't a great idea...) It works well, but it's nice to have support for a device and other people using it helps resolve issues and such.

    But, it's a great experience to learn, so you can know a bit the process to make your own.

    So, I would suggest following the Basic Atom's manual and build around that. There are some great (go and read them ALL) tutorials on the SparkFun site that teach you how to build a circuit in eagle to send to a fab house. There is also a tutorial on making custom parts in eagle (maybe the Basic Atom doesn't have a pre-made design for eagle). So you need to make it and test it (print out a scale 1:1 of the board and place the atom carier over it to see if it fits. But you can probably modify one of the models for the Basic Stamp (same width, so you have to add a couple pins in length).

    From your question about the pull-up resistor, you will have to understand how electricity works and circuits work. I made one small mistake on my board for the mini-sumo and it meant cutting lines and green-wiring... long and not as sure and nice as the board.

    So probably Google that part or buy a book. I have "electronic circuits for the evil genius" and I like the book, helps to learn the basic electronics and I sometimes refer to it when I forget PNP or NPN...

    Sam

  3. Re: build my own basic atom pro 28 carrier board

    is this mean that both these pin is input??? then how much current will go in the pin 12 and 15 if 1k pull-up resistor is used ??? what is the maximum current the atom can support??? is it 1K suitable for it??? or need to be higher??? thanks

  4. #14
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    Re: build my own basic atom pro 28 carrier board

    I'm sorry, but questions on these forums require a minimum of 4 question marks to be valid. Thanks!

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    Re: build my own basic atom pro 28 carrier board

    Your jumping way to far ahead. Before you even worry about PS2 controller you need to get your base design down. At leat hook up a Basico Micro and see if you computer recognizes it. For someone starting out planning for all future features is asking for failure. To really do something you really need to grasp the basics. Start small and work your way up. Its easy to add a resistor later. Your question can easily be done with a little math and Ohm's law.

    I assume this is most likely a school project. There have been plenty of people before jumping on this forum asking for something laid out. It wont happen. Sorry if thats what your looking for.

    If you show some progress people will begin to help alot more than you think!

    Otherwise I am not wasting my time doing homework.

  6. Re: build my own basic atom pro 28 carrier board

    ok...thanks... i willl learn from that... thanks

  7. Re: build my own basic atom pro 28 carrier board

    first of all.. sorry for my broken English.. i had build a carrier for BAP28... everything goes fine... i mean the hexapod can be controlled and can walk as usual... but there is one weird problem happening... which is as following detail

    1} buzzer keep beeping(non stop)... actually is continuous sound(same frequency after first beeping)...
    2} the beeping sound is different than the one where the PS2 controller is not connected to the Atom properly
    3} the sound also got a little bit different from the one when we apply power
    4} during the continuous beeping sound.. when i press other button such as start button... it will still appear original start button's beeping sound pattern as usual (mix with the continuous beeping)
    5} but the buzzer goes normal(pin9 LOW) and fine after i reset it or press square button(ps2) for the (1st press and 2nd press after start button)
    6} every time apply power... it will keep beeping(pin9 HIGH) until i press reset or square button (1st press and 2nd press after start button)
    7} but the beeping comes again(pin9 HIGH) if i press square button(3rd press and 4th press)... and will goes normal(pin9 LOW at 5th press and 6th press)...
    8} the reset button can be press at anytime and works fine(pin9 LOW) anytime i press it
    9} conclusion is for square button (1st and 2nd press- Pin9 LOW... 3rd and 4th press- Pin9 HIGH... 5th and 6th press- Pin9 LOW and so on)

    but the hexapod can be controlled as usual... please help...

    what happen actually??? why i need to press reset or square button(1st,2nd,5th,6thpress)??? please help.. thanks
    Last edited by soldier; 03-18-2010 at 10:13 AM. Reason: got improvement

  8. #18
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    Re: build my own basic atom pro 28 carrier board

    Try changing the 10K resisor to something between 1K to 3.3K.

  9. Re: build my own basic atom pro 28 carrier board

    i had try to change the resistor.. but still the same... actually i feel weird that why the pin P9 keep HIGH which cause my buzzer keep beeping?? i need to know what things that keep make my P9 pin keep HIGH... thanks...

  10. #20
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    Re: build my own basic atom pro 28 carrier board

    Thats software that will keep it high or a wiring issue. Post a pic of the built circuit.

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