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Thread: Simply serial input circuit

  1. #51
    Newbie thasaint's Avatar
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    well then that makes sense. i guess i wasn't thinking like that.

    thank you all for enlightening me.
    the flesh does not determine what is within.

    carputer is in begining status

  2. #52
    I'm sorry, and you are....? frodobaggins's Avatar
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    If you are interested in discussing other solutions, please start a new thread.
    [H]4 Life
    My next generation Front End is right on schedule.
    It will be done sometime in the next generation.
    I'm a lesbian too.
    I am for hire!

  3. #53
    Maximum Bitrate yunusyu's Avatar
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    frodo, thinking of manufaturing these anytime in the future...could make money and that way i will feel safer with distributing these
    Of course since you will monopolize the disribution of this device, you can make a nice price for it
    I understand how it works...simple and nice thank you everyone!!! Now i need to perfectly understand how when the hand brake is not up, then the NC will not send a signal, thus, the pole will have no charge...so why do we need NO?Again i am not an engineer...trying to learn
    thanks
    DICE Los Angeles
    ]

  4. #54
    Raw Wave rando's Avatar
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    You need a double throw relay to make sure the pole (attached to a serial input pin) always gets a valid RS232 level instead of floating. For many modern serial ports, it's possible you can float the input and it will still be detected as a low voltage (logic High).

  5. #55
    Maximum Bitrate yunusyu's Avatar
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    Red face

    Quote Originally Posted by rando
    You need a double throw relay to make sure the pole (attached to a serial input pin) always gets a valid RS232 level instead of floating. For many modern serial ports, it's possible you can float the input and it will still be detected as a low voltage (logic High).
    Ok so, in my case where I dont want people to be able to switch off the interlock...I can just do the following without the switch, am i right?
    I have not hooked up a interlock system yet, where is the positive and the negative of the handbrake (i am guesting I just splice the one wire that goes to the handbrake and the part that is attached to the metal is (-))? well here it is..
    Attached Images Attached Images  
    DICE Los Angeles
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  6. #56
    Raw Wave rando's Avatar
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    I'm not sure what you're asking. Your diagram is exactly the same as the one suggested in this thread (see post #20) assuming you hook your relay pole up to DSR. Frodo just posted a version using a switch instead of a relay -- for testing purposes only.

  7. #57
    Maximum Bitrate yunusyu's Avatar
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    Nono, I was just looking for final approval of the design...frodo approved
    DICE Los Angeles
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  8. #58
    Raw Wave rando's Avatar
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    ok, well like I said, your design is the same as the one in this thread which is the one that FP1.09 supports. Basically anything that can toggle the DSR line will work in FP1.09.

    BTW, I'm not sure what that diode is doing for you. If you meant to block kick-back from the coil, it should be in parallel with the coil pins.

  9. #59
    Maximum Bitrate Maņana's Avatar
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    Why do you need to short pin 6-4 when 6-7 isn't shorted? I've tested with just shorting and "unshorting" 6-7 to launch and shut down FrodoCam, and i didn't find any need for shorting 6-4?

  10. #60
    Raw Wave rando's Avatar
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    It guarantees that pin 6 is always at a valid RS232 level. Read the thread, it's been explained.

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