how much power supplies do i need??

Discussion in 'Power Electronics' started by Robsim, Sep 6, 2016.

  1. Robsim

    Thread Starter New Member

    Sep 6, 2016
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    Is a triple output or three single output power supplies enough for designing circuits with op amps, transistors relays, contactors enough.??
     
  2. ramancini8

    Member

    Jul 18, 2012
    442
    118
    Usually +5 Volt and +,- 12 to 15 Volt are the power supplies used.
     
  3. OBW0549

    Well-Known Member

    Mar 2, 2015
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    I have one power supply that gives me +5V at up to 500 mA and +/- 0-15V at up to 100 mA for general use with opamp circuits and microcontrollers, plus a 0-35V 5A supply for higher power stuff, and a collection of assorted AC and DC wall-warts. Seems to be adequate...
     
  4. Robsim

    Thread Starter New Member

    Sep 6, 2016
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    I want to focus on automation, microcontrollers, Contactors, thyristors etc. Also I don't want a ton of wall warts. They pick up space. The parts i could use.

    Ok so you have 3 power supplies. I already have two 30v 5 amp power supplies. If I have a third one i'm covering about everything, am I correct??
     
  5. crutschow

    Expert

    Mar 14, 2008
    13,006
    3,232
    Yes. But you likely don't need 5A, if you want to buy a cheaper supply.
     
  6. Robsim

    Thread Starter New Member

    Sep 6, 2016
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    Ok, the power supplies I have are not expensive and also not the fancy programmable ones. As a beginner I bought mid range priced
    ($90 - $ 150) power supplies with coarse/fine adjustment pots. For me it is very imported that if a power supply fails, I must be able to repair it myself. I also did not buy one with triple outputs because I am afraid that if something bad happens with the unit i'm completely out of business.

    One power supply I already have is now cheaper, so I will get that. Ok so i'm on the right track??
     
  7. OBW0549

    Well-Known Member

    Mar 2, 2015
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    I would think so.
     
  8. Robsim

    Thread Starter New Member

    Sep 6, 2016
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    Thank you
     
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