using um245r in a project

Discussion in 'The Projects Forum' started by zeybekli, Apr 21, 2011.

  1. zeybekli

    Thread Starter New Member

    Apr 21, 2011
    2
    0
    there is king little project i have to done in 2 weeks but and i dont know anything about elektronics.

    first thing i have to put all elecronics devices on the board.
    i have UMR245R and it has 24 leg and 8 leds and 8 registors.
    so which legs goes to resistors or led i had no idea .
    anybody help me about tht here .
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
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  3. zeybekli

    Thread Starter New Member

    Apr 21, 2011
    2
    0
    pls dont ask me that :)

    i have to make little s/w for circuit also.
     
  4. JingleJoe

    Member

    Jul 23, 2011
    185
    10
    Anyone else having a hard time understanding whats going on in this thread or did I miss something?
     
  5. wayneh

    Expert

    Sep 9, 2010
    12,093
    3,033
    Let me ask the question differently: What is the context of this, the application? Your request makes no sense without that information. You might be building a device to slice apples, and this would be a poor start. Anyone that might help you needs to know. What ARE you good at, that is relevant to this project?
     
  6. n1ist

    Active Member

    Mar 8, 2009
    171
    16
    Gazing into my crystal ball here...

    The OP has an FTDI UM245R USB-Parallel port development module. He wants to connect 8 LEDs to the 8 data bits and drive it from a PC.

    The data sheet for the module is at http://www.ftdichip.com/Support/Documents/DataSheets/Modules/DS_UM245R.pdf

    Look at section 7.2 for the basic connections. Pick resistors for the LEDs to limit the current to under 100mA total, under 15mA per LED.

    /mike
     
  7. eb5741

    New Member

    Oct 5, 2012
    1
    0
    Hi Guys

    The UM245R can be used to light up LED's or Opto devices.

    Simply add the circuit to RXF# and RD# and send a charator using Hyperterminal or from a program to the COM port

    VCC ----------------
    RXF# ---10K------BC557
    100K and 0.1uF in parallel
    RD# ----------------
    1K
    GND ----------------

    I used 1K resistors for each output bit, this gave me 3.5mA for the LED

    Hope this helps :)
     
  8. MrChips

    Moderator

    Oct 2, 2009
    12,421
    3,357
    Geez, how did you manage to get past the "best before date"? This thread is more than a year old.
     
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