Voltage Divider with the 8051

Discussion in 'Embedded Systems and Microcontrollers' started by sandraos, Jun 25, 2009.

  1. sandraos

    Thread Starter Member

    Jun 8, 2009
    12
    0
    Why does'nt the following schematic work? Also, is it possible to use a zener instead? If so, how would I hook it up?

    Thanks for the help,
    Salim
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    Voltage dividers only work for a constant load. The current draw of the 8051 varies moment to moment. Use a voltage regulator like a 7805 instead. Google the number and get a data sheet to see how to use one. With a 10 volt source, you may need to mount it on a heat sink to keep heat down.
     
  3. sandraos

    Thread Starter Member

    Jun 8, 2009
    12
    0
    thanks beenthere,
    the 7805 is exactly what i was looking for
     
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