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  1. T

    0-30 Vdc Stabilized Power Supply

    I constructed the psu but there is a problem.when i alter the output voltage it varies from 19v to 31v and its jumps rappidly from 19 to 31 not proportionally.Also the current regulator does not function,the led turns on only when the amps pot is on its end.Any opinions? which components should...
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    0-30 Vdc Stabilized Power Supply

    Anyone please?  ??? :-\ ???
  3. T

    0-30 Vdc Stabilized Power Supply

    I will try to find one of BZX79C5V6, BZX55C5V6 or 1N5994.Lets hope that i will find one of them!Sorry for my ignorance about zeners, i do not know much about them(I study physics, not electronics  :-\ :-\ :-\ ). When someone says the eg. 5V zener spec'd at 10mA means that with a current of 10mA...
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    0-30 Vdc Stabilized Power Supply

    Thanks for your reply and i am glad that i am a member here! ;D ;D ;D  Indeed i was amazed with TI and FEDEX. If i use any 5.6V 1/2W zener will it be ok?Also i contacted a local electronics shop and they have tip31c insted of tip31a. Is it ok?
  5. T

    0-30 Vdc Stabilized Power Supply

    Hi all!I am planning to build this psu with the modified parts list.I managed to get 3 opa445ap as samples from TI (they came fron the us to greece in only 2 days at my door! wow!).I will use the original pcb.Is it correct?Also in the modified partslist C5 is 220nf and in the original 200.Why c5...
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