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Author Topic: Homebrew lab-quality 5A 30V bipolar power supply  (Read 4111 times)

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Offline zamboniman60Topic starter

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Homebrew lab-quality 5A 30V bipolar power supply
« on: April 24, 2007, 08:27:14 PM »
I've been poking around datasheets and various resources, and I think that I have completed the design for my new lab power supply; I'm getting tired of the 4A emitter follower that I built back when I had no experience... Anyway, I based the design for the transistor - Voltage regulator chip setup on something I ran into on the LM317 datasheet, and tweaked it for the LM337 (negative rail). Could you people tell me what you think of the design, if there are any obvious problems, and where I can find high-quality potentiometers and high-current PNP transistors?

The schematic for the power supply, and yes I made it pixel by pixel in paint. It helps me mull over the design as a whole while doing a repetitive task.
Location:
http://a261.ac-images.myspacecdn.com/images01/45/l_4f0da96ff1c8cfadc14d4867ad4a0ae4.jpg

I apologize for the quality, I cannot get a higher quality version up on the web. the 2 transformers are 5A 24VAC and all the chips except the lower-left one are LM317s, the lower-left one is an LM337.

« Last Edit: April 24, 2007, 08:45:43 PM by zamboniman60 »

Offline zamboniman60Topic starter

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Re: Homebrew lab-quality 5A 30V bipolar power supply
« Reply #1 on: April 24, 2007, 08:44:27 PM »

that should give a MUCH better schematic

Offline ed1380

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Re: Homebrew lab-quality 5A 30V bipolar power supply
« Reply #2 on: April 24, 2007, 08:57:47 PM »
<---noob

looks pretty cool
probably work too , since it's so complicated
Problems making the $50 robot circuit board?
click here. http://www.societyofrobots.com/robotforum/index.php?topic=3292.msg25198#msg25198

Offline zamboniman60Topic starter

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Re: Homebrew lab-quality 5A 30V bipolar power supply
« Reply #3 on: April 25, 2007, 10:14:48 PM »
I think the very bottom transistor has to be changed to a PNP, but I suppose that the real test of truth would be breadboarding it...

Offline zamboniman60Topic starter

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Re: Homebrew lab-quality 5A 30V bipolar power supply
« Reply #4 on: May 03, 2007, 10:00:36 PM »
anyone there?

Offline jsmoker

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Re: Homebrew lab-quality 5A 30V bipolar power supply
« Reply #5 on: May 15, 2007, 08:38:27 AM »
I'm confused about something. How can this handle 5A when the chips your are using are specified for 1.5A?

 


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