Gallery, Projects and General > How to's
How to Make a Power Supply
Divided he ad:
Well you've lost me on most of this guys! :scratch:
I'd appreciate it if you could point me in the right direction with components Darren.... For the PSU you've been making for the mill's :thumbup:
I really want to get one built.... Did we (you) settle on a fully usable circuit? I got lost in all the heavy talk about the ins and outs! :smart:
Thank you,
Ralph.
Darren:
Sorry Ralph, I've been a little sidetracked more than once.
The one I've been building in this thread will be fine..
One rectifier (you have one)
two 1n4007 rectifiers (you might have those too)
one LM338T voltage regulator
Two 220 ohm 1/4W resistors
Two 1000uf 50V Electrolytic Caps (don't need to be too rigid with these values, just make sure the voltage is over 35V)
One board to mount it all on.
5K linear Potentiometer
One transformer, 9 or 12V for 12V motors, 18 or 24V for 24V motors.
You might want to get a 2n3055 transistor while you are at it. I'll explain another time but it would be handy to have it ready.
Try Maplins first for the parts, most other places require you have an account and even I don't have one these days.
So Ebay for the parts Maplin don't have is a good option.
If you get stuck or are unsure, just shout :thumbup:
Darren:
I found this in the US for those who don't have the confidence to build their own, just swap the LM317 for a LM338 and use a bigger heat sink.
http://www.electronickits.com/kit/complete/powe/ck402.htm
Darren:
The diagram....
Now before anyone pipes up, this is what I built and tested, it works and it works well.
I have no doubt others may do things differently, maybe add some small value caps, bigger caps, different resistor values, pot etc, ect.
There are many ways to build these types of circuits, and each to their own.
Mine works as is and I couldn't see the point in going further to make the ultimate. If you feel the need then by all means go ahead and do it.
spuddevans:
--- Quote from: Darren on May 18, 2009, 12:17:23 PM ---Now before anyone pipes up
--- End quote ---
I just thought I'd pipe up here to say... :poke:
That looks great :thumbup:
Tim
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