8051 With 7 Segment Multiplexed.

Discussion in 'Embedded Systems and Microcontrollers' started by Shear_Intelligence, Jul 21, 2012.

  1. Shear_Intelligence

    Thread Starter New Member

    Jun 10, 2012
    29
    0
    Hi there i wanted to build a digital clock for this purpose i used 8051 and multiplexed 7 segments achieve results but unfortunately i'm not able to built circuit to programme on. any suggestion if i directly connect 7 segment multiplexed or through inverter?
     
  2. shubham161

    Member

    Jul 22, 2012
    50
    3
    use a transistor BC547 to multiplex the seven segment. I tried it a while ago but i was not successful. I think it was the fault of my simulation software proteus because everybody else was successful by following exactly the same steps.
     
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  3. Arm_n_Legs

    Active Member

    Mar 7, 2007
    183
    10
    Which 8051 are you using? The port may not provide sufficient drive for the LED. You can use a ULN2803 transistor array to buffer between the I/O and the LED.
     
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  4. Shear_Intelligence

    Thread Starter New Member

    Jun 10, 2012
    29
    0
    Actually i tried transistors but i was confused the values of resistors to use. i think using buffer is good option
     
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