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cwt

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Posts posted by cwt

  1. Hi out there..
    Currently i need a serial in parallel out circuit in order to operate my circuit behind that.

    I need a circuit that is able to invert the incoming serial signal and remove the start and stop bits.

    I am using a MAX232 and PC16550D UART to do so. The problem i face is how to program that UART. ???

    Anyway, i come across this website.

    http://www.qsl.net/yo5ofh/hobby%20circuits/computer_circuits.htm

    I found something interesting about the circuit.

    serial3.gif

    Can this circuit operate as what i want? I need some confirmation. ;D

    Thanks!!!

  2. Hi out there... ;)
    I have something to ask about my programming stuff. Currently i am using visual basic 6.0 to do my programming.

    What i want is like that: ::)

    Base on an ASCII character, my program will able to find the pattern that represent the character and display it on the dot matrix array.

    How am i going to store all the patterns for each of the ASCII character? ???
    Eg. for the character 'A', the equivalent display pattern is [c1,b7,77,b7,c1].
    *Note: all display pattern is in hex.

    How am i going to retreive the pattern for each ASCII character? ???
    Eg. for the character 'A', the display pattern [c1,b7,77,b7,c1] will be send out to the dot matrix array.

    Thanks!! 8)

  3. Hie out there~!

    Currently im working on my final semester project called [glow=red,2,300]Programmable Dot Matrix Display System[/glow]. I hope i can get some guidiance from here. My project will not include any microcontroller and PICs. :-\

    Basically, my thing will work like this: User key in something in a textfile, then the messages will be send out thru a serial port to the external circuit for displaying purposes. At the same time, user is able to control the number of repetition and the frequency of the displayed characters from an interfacing program.

    Now i need some information on the driver chip that drives the column of the 8x8 dot matrix array. Is there any driver chips that is suitable for those arrays?? ???

    Thanks!! :D

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