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0-30 Volts / 2,5A Variable Power Supply

  

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This is a high quality power supply with a continuously variable stabilized output adjustable between 0 and 30VDC. the LM 723 is the heart of the power supply which drives the BD137 and then the 2N3055. The circuit provides short circuit protection. And has great stability at voltage changes.

0-30 Volts / 2,5A Variable Power Supply - img1

Drive the circuit with 24 Volts 3A from a transformer. the 2N3055 needs a good heat sink.


Datasheet file1: Click here to download BD135.pdf datasheet.

Datasheet file2: Click here to download LM723.pdf datasheet.


Comments

Jun 1, 2008 JORGE RESTREPO

TRANSISTOR BD 135 IS INVERTED. MALFUNCTION.FAILURE..FAILURE

May 2, 2009 for project

for collage use

May 11, 2009 Electronic

BD 135 miror .. Bd 135 emitter connec to 2N3055 beyz

Sep 27, 2009 from russia

Max output is only 15v depending by internal LM723 stabilisizer from pin 6.

Apr 22, 2010 aussie-knows-how-it-works

Output will theoretically reach 30V but the current limit is a bit of concern! 4 amps by my calculation which could result in destruction of the 2N3055 even if it is mounted on the largest of heatsinks when the output voltage is set low and current limit is reached. Urgh.....who designs such crap?

May 3, 2011 KASHISH TANEJA

we had worked out on this circuit and we found few faults in it , the connection of transistor bd135 is wrong , it is to be like that in place of emmitter it will be coollecter and vice-versa and in it we will use a 15-015 transformer....

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