How much current at each voltage?
regulated DC power supply
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8th April 2009 04:42 PM #1fluffy13
regulated DC power supply
hello... anyone who can help me design a regulated DC power supply that will supply 3, 5, 6, 7.5, 9 and 12?
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8th April 2009 04:56 PM #2crutschow
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8th April 2009 04:57 PM #3tcmtech
Check out the specs sheets on a LM317 adjustable voltage regulator.
Or any other adjustable type regular. There are switching types too that have higher operating efficiencies as well but doe take more parts and are harder to build.0"Only someone with something to hide has reason to fear open and honest communication."
The scariest thing about where I work is that I am the good employee!
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8th April 2009 06:18 PM #4microtexan
Regulated power supply
At the top of this page is "link" to search this form. A search for "regulated power supply" produces over 100 results. A little work on your own goes a long way.
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8th April 2009 08:25 PM #5mneary
See the LM317 data sheet. From there, it's mostly a mechanical design.
All you have to do is design one power supply using an adjustable regulator and get it working. Then build five more to fit in the same box with different calculated outputs and you're done. It's up to you whether to share one transformer or use several. The biggest decision you'll have to make is whether you want all of the (-) terminals to be common, or not.0
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9th April 2009 02:19 AM Thread Starter #6fluffy13
reply
uhm.. current- not specified.. we are just asked to come up with the given voltage output.
Originally Posted by crutschow
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9th April 2009 02:20 AM #7tcmtech
Ah! another class project! I should have guessed.
0"Only someone with something to hide has reason to fear open and honest communication."
The scariest thing about where I work is that I am the good employee!
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9th April 2009 02:25 AM Thread Starter #8fluffy13
yah! class project.. haha.. we already have our circuit design. we also tried to build a power supply. we just don't know why 2 of the LEDs aren't working. and if we measure the voltage output at each, it remains constant. voltage output should change from 3 then 5 then etc... Originally Posted by tcmtech
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9th April 2009 02:28 AM Thread Starter #9fluffy13
do we really have to know the current at each voltage? Originally Posted by tcmtech
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9th April 2009 02:33 AM #10tcmtech
Only if you are actualy going to power something with it. Other wise its just theoretical.
0"Only someone with something to hide has reason to fear open and honest communication."
The scariest thing about where I work is that I am the good employee!
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