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Bread Board and 89c51

puremobis samuel

HI,
I have made a small program on 89c51 to light an led..the entire setup is made on a breadboard..
but there is no response or proper output.

The same 89c51 is working on my project kit accurately.

what is the issue with bread board and 89c51?

  • 0

    the entire setup is made on a breadboard..
    if that is a "solderless breadboard" THROW IT OUT

    what is the issue with bread board and 89c51?
    any signals with fast risetimes are critical (regardless of 8051 or not), a carefully made breadboard with VERY short connecting wires and proper decoupling MAY work. Just to illustrate: may printed circuits that are not 4 layer have problems too.

    Erik

  • 0 in reply to erik malund

    When designing with a breadboard, it is usually best to design with a chip with PLL so an external crystal can run at a quite low frequency, or to use an internal RC oscillator.

    Then you can usually get quite good function, as long as you do not need high-quality analog sections - for example many bits of precision on ADC.

  • 0 in reply to ImPer Westermark

    Thanks..i hav got it work ..though not entirely..need to amplify some outputs...
    its like a miracle..it worked today after more than two weeks of failure..