0-30 Vdc Stabilized Power Supply

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Sallala:
I plan to build this project:
0-30 Vdc Stabilized Power Supply With Current Control 0.002-3 A
http://www.electronics-lab.com/projects/power/003/index.html

My question is that I must supply this circuit exactly with 24VAC, or I can differ? So in what AC input voltage intervallum can I use this circuit?

Thank you,
Sala

mozikluv:
if you will use a higher voltage say 36v you have to make adjustments in the resistors, caps and transistors. i believe that circuit was specifically designed for that voltage. a little variance would still make it operable.

AVRFreakMan:
24V AC is a standard Voltage Output of common transformers, that's why this circuit was designed for this voltage. A few volts up or down(maybe +-5V) aren't going to produce any fault but it is recommended that you use a 24V AC transformer.

Sallala:
Thank You!
Exactly: +-5V AC, or +-5V DC?

But maybe I must buy a tranformer, I haven't got a 3A one at home.

When I ready with the circuit I will add comments.

DerFly:
Hello All,

I am currently looking for the components to put this project together.  It seems that the Op Amp TL081 is not so easy to find in my area.  

National Semiconductor says that the TL081 can be used to upgrade circuits which use the LM741.  Also that the LF411 can be used as a substitute for the TL081.

The LM741 is available locally.  Can I use thise as a substitute?

Thanks for your replies.

DerFly

Project Link: http://www.electronics-lab.com/projects/power/003/index.html

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