Help with current required

Discussion in 'The Projects Forum' started by James4553, Aug 29, 2009.

  1. James4553

    Thread Starter Active Member

    Jun 7, 2008
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  2. mik3

    Senior Member

    Feb 4, 2008
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    You mean to connect them in parallel and not in series.

    If you consider the current drawn by these two chips a power supply with 20mA capability is more than enough. If you will power other devices with the same power supply you have to consider their current requirement.
     
  3. James4553

    Thread Starter Active Member

    Jun 7, 2008
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    Sorry, I meant I am connecting the two IC's together in series, but yes the power source will be powering them in parallel.
    I don't think I can get a 12V / 20mA plug pack, can I get a plug pack with a higher current and then make a current divider with resistors to get the right current?
     
  4. Ron H

    AAC Fanatic!

    Apr 14, 2005
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    If you apply the proper voltage, the devices will only draw as much current as they need.
     
  5. James4553

    Thread Starter Active Member

    Jun 7, 2008
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    Great, thanks for the help!
     
  6. SgtWookie

    Expert

    Jul 17, 2007
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    Get a 12VDC wallwart, and then build an 8v supply, which is the recommended voltage for those ICs.

    You can test your circuit beforehand using 9v "transistor" batteries.
     
  7. KMoffett

    AAC Fanatic!

    Dec 19, 2007
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    I haven't heard of them referred to as "transistor batteries" for a long, long time. ;)

    Ken
     
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