Re: voltage controller circuit

On Jun 29, 5:02 pm, alishadevoc...@xxxxxxxxx wrote:
Hi

I have 30 volt regulated adapter. I would like to create a circuit
which will allow me to control the voltage from 0 to 30.

Can anyone tell me where I can find a diagram for such circuit? I am
very new to electronic. I am creating this for my ety class -- mostly
to test series and parallel circuits, and few other lab work.
However, I may use it for other things too.

Thanks in advance

Update

I built following circuit on a breadboard and voltage regulator (5K
LM317 regulator) was burned -- sparking were coming out it...

http://vancouver-webpages.com/peter/lm317.gif <--- this was the c

This is what I did with LM317

LM317 has three input (a,b,c)
a goes to ground,
b connectedt o resistor 240, -- i was using resistor 220om cause I
don't have 240ohm
c connected to LM317?

what went wrong?

.

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