LM317 Small Power Supply

video LM317 Small Power Supply

This is LM317 small power supply.The input voltage must be at least 1.5 volts greater than the output voltage.
The output voltage is adjustable between 1.25 and 13.5 volts if the input is 15 volts,maximum current
limit is 1.5 Amps
A heat sink will be required for most aplications however
Here are pictures to see the power supply and schematic

mnmc10 says: Feb 1, 2010. 4:50 PM

hi can you list the parts needed?

macobt (author) in reply to mnmc10Feb 2, 2010. 3:56 AM

The parts:
LM317 regulator
Heat sink for LM317
DC in power jack
Capacitor 2200mf 25v
Capacitor 4.7mf 25v
Led diode
On,off power switch
Pot 4.7K
Output conectors

trhone in reply to macobtNov 3, 2012. 10:07 AM

i willing to pay for someone to show me how to do this

macobt (author) in reply to trhoneNov 3, 2012. 4:18 PM

I would like to help,but I dont have time to record video how to do it,maybe you should search on youtube how to make it.

trhone in reply to macobtOct 31, 2012. 9:55 PM

can u send me a video step by step on how to tput it together bodyinktattoos1@gmail.com

sa104pm in reply to macobtOct 15, 2011. 5:10 AM

I'm a bit confused on your cap values... are they mf as in milli farad, or uf micro farad???

macobt (author) in reply to sa104pmOct 15, 2011. 12:09 PM

Cap values ere in micro farad.

sa104pm in reply to macobtOct 16, 2011. 2:38 PM

okay thanks. I ended up not needing to use caps though. Im just building a simple LED driver (lamp for the license plate on my motorcycle) and only required resistors

albertoelaria in reply to macobtJun 9, 2011. 12:19 PM

you forgot to mention the resistor value ???
is there one?

macobt (author) in reply to albertoelariaJun 9, 2011. 2:44 PM

Yes I forget,the resistor is 240 ohms 1/4watt

selectauto says: Oct 15, 2011. 5:32 AM

PLEASE PLEASE Write Step by step instructions on how to buid this curcait. I really need this. i don't no much about electonics but i have eye's and ears and I can follow intructions and have a good online tool called google for extra resurch. PLEASE Place step by step intructions here!

tim127 in reply to selectautoNov 1, 2011. 5:29 PM

if you get the lm327 at radio shack there is a pretty simple schematic on the bad and r1 is the resistor and r2 is the potentiometer

oabdullah says: Aug 31, 2011. 4:52 PM

i have to do a variable power supply 0-12v....can i use LM137??

albertoelaria says: Jun 10, 2011. 5:17 AM

can i use 50k pot instead of 5k? do i have to change the resistor value from 240 to less.

i am new to electronics :( need some help

Electronics Man says: Jun 7, 2011. 6:42 PM

Awsome project but you might consider publishing a full step by step instructable because it would really help with the building.

chicken12175 says: Apr 11, 2011. 12:09 PM

what is the casing made of?

tomx63 says: Oct 20, 2010. 5:39 AM

nice job indeed. can you update the schematic to include the LED?

santik says: Oct 13, 2010. 10:43 PM

I intend to use it on a audio amplifier... I have tried connecting a router supply to it... and there is hum... so does a laptop adapter...

will this project make the voltage constant? and no hum?

thanks!

macobt (author) in reply to santikOct 14, 2010. 11:09 AM

You can use this power source for your amplifier,but you must have good curent transformer.

santik in reply to macobtOct 14, 2010. 8:39 PM

good current transformer? what do you mean by good current transformer?
isn't all transformer does the same job? step-up or step-down? But that's still AC right?

I tried using a wall wart directly to my project... but hum and AC noise comes in... very badly...
I thought of using a wall wart DC14V though this and I believe the maximum is 1.5V smaller which is 12.5V... what would be the 2 resistors be?

tjmania2003 says: Mar 1, 2010. 2:46 PM

What is the song in the background?, =)

... this project seems fun and could help me in my Electronic Circuits class, i have to build a power supply with an output of 12Vdc and output current of 0-2 Amps. Do you think this circuit will do the trick??

Good Job overall, the LED makes it seem even more legit.

rntrrnc in reply to tjmania2003Aug 1, 2010. 4:38 PM

The song in the background is Un altra te by Eros Ramazzotti. http://www.youtube.com/watch?v=wqvgONdQujM

tjmania2003 in reply to rntrrncAug 1, 2010. 5:41 PM

Much Respect! Thanks a lot!

macobt (author) in reply to tjmania2003Mar 2, 2010. 11:56 AM

Thanks
I dont know what is the song,while I record the video the song play on my TV.
And wnat circut?

tjmania2003 in reply to macobtMar 2, 2010. 7:34 PM

Sure

you can send all the info on here please.

Thank you for everything!!

hexinverter says: Jul 25, 2010. 8:26 AM

Nice video! I have a question for you if you don't mind... If I were to use a 19v/3.42A wall supply, what capacitor values should I select? Bigger is better, to a point, right? Just want to make sure :) Of course I'll be using a higher current regulator. Thanks!

hitachi8 says: Jul 14, 2010. 12:09 PM

is there a way to protect my LM317 ? if i accidentally plug a 5amp thing on my Power supply , the LM317 gonna burn . is there a way to protect that ?

macobt (author) in reply to hitachi8Jul 14, 2010. 4:07 PM

hELLO If you conect three lm317 in parallel you can got 4.5A,but evryone must be on heat sink!!!!

jackeytip says: Jul 11, 2010. 11:59 PM

Thanks a lot. i already built one and it's working perfect. i use it for power my ardino board. Thanks