+/- 15&12v Power Supply |
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kr1sounds
Young Croc Joined: 28 June 2014 Location: ThePromiseLand Status: Offline Points: 920 |
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Posted: 15 August 2014 at 9:23pm |
Done a bit of research and decided to make my own.Im not sure if it works yet will test soon..
If anyone is willing to test please do and let me know Cheers
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I MAN SERVE SELASSIE CONTINUALLY... NO MATTER WHAT THE WEAK HEART SAY
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mini-mad
Old Croc Joined: 13 July 2012 Location: london Status: Offline Points: 6903 |
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...what are the 78XX rated at? and what is it powering?.... i ask as i HAVE build somethis imilar and i had 2amp 78XX chips and they got nice and hot wen "driven" hard.
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If it sounds like a gorilla is trying to escape, turn it down.
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kr1sounds
Young Croc Joined: 28 June 2014 Location: ThePromiseLand Status: Offline Points: 920 |
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im not sure, ill have a look. im looking to get a high current out of them so i'll be putting them on heatsinks
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I MAN SERVE SELASSIE CONTINUALLY... NO MATTER WHAT THE WEAK HEART SAY
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kr1sounds
Young Croc Joined: 28 June 2014 Location: ThePromiseLand Status: Offline Points: 920 |
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1.5A for a preamp im building
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I MAN SERVE SELASSIE CONTINUALLY... NO MATTER WHAT THE WEAK HEART SAY
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audiomik
Old Croc Joined: 06 April 2010 Location: Bath, UK Status: Offline Points: 2962 |
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Have built many PSUs of the type in your circuit diagram.
You should add load resistors to the outputs of each of the Regulator IC's. Have another look at the IC Datasheets in the applications and test circuit sections. This guarantees a minimum current at the IC output. Next is to add suitable diodes to prevent reverse biasing the ICs when powering down. Also a good idea to have a LED for each output to easily see if you get a fault condition hope this assists Mik Edit: korekt schpeling Edited by audiomik - 16 August 2014 at 12:55am |
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Warning! May contain Nuts
plus springs, washers, screws, etc, etc. |
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dj jammin
Young Croc Joined: 10 April 2010 Location: southampton Status: Offline Points: 770 |
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Why do you need the +/- 12v?
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Reverence Sound system
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kedwardsleisure
Old Croc Joined: 20 January 2009 Location: Staffordshire Status: Offline Points: 4938 |
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your rectifier diodes don't quite look right
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Kevin
North Staffordshire |
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JR.junior
Old Croc Joined: 14 December 2009 Location: Slovenija Status: Offline Points: 1789 |
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yes, turn it cw for 90 degrees.
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Support the scoop technology, larger mouth plays louder!
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kedwardsleisure
Old Croc Joined: 20 January 2009 Location: Staffordshire Status: Offline Points: 4938 |
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that won't work either.
You've got 2 diodes the wrong way round. In the pic your mains transformer will lead a rather warm, if short, life. Clue: a bridge rectifier will have 4 connections. Yours has only 3 Edited by kedwardsleisure - 16 August 2014 at 2:02pm |
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Kevin
North Staffordshire |
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mini-mad
Old Croc Joined: 13 July 2012 Location: london Status: Offline Points: 6903 |
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....and theres me just skipping over the design with disregard and an assumption that the bridge was correct lol
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If it sounds like a gorilla is trying to escape, turn it down.
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JR.junior
Old Croc Joined: 14 December 2009 Location: Slovenija Status: Offline Points: 1789 |
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2 diodes diodes wrong connected, oversaw that.
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Support the scoop technology, larger mouth plays louder!
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kr1sounds
Young Croc Joined: 28 June 2014 Location: ThePromiseLand Status: Offline Points: 920 |
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for the vu meters
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I MAN SERVE SELASSIE CONTINUALLY... NO MATTER WHAT THE WEAK HEART SAY
fostonshfs.webs.com |
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