Inexpensive DC power for your layout or bench

I ordered mine a day or two after the 28th, I received an e-mail that it was shipped, but wasn't worried that it hadn't arrived yet.  So maybe based on Chuck's experience, mine should be here soon.  No rush on my part though.

Remember the days when everything was "allow 6 to 8 weeks for delivery?  I would scrape up a quarter and so many box tops, then would forget about it before the offer on the cereal box arrived.  

Larry Sr. posted:

I have no idea why I said 21??? right after I counted 24 .......a dumb moment.

I really can count

Sure you can, right up to 20 and then you run out of fingers and toes!   No wonder you stopped at 21.

OK, just having a little fun.

If you already bought the evenly spaced adapter board and want the dual-banana spacing how about this.  Yes, it's more work and adds some bench clutter but you get a DC combo volt-current meter (as shown earlier) when all's said and done.  Probably want to assemble it in a project-box or whatever.

dual banana DC metered

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Chuck, you don't have the version with the different spacing, your posts are evenly spaced all the way across.

Here's the one that Stan posted.

Compare that to the spacing on yours.

I think the one that Stan posted likely will accept the dual banana plugs.

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gunrunnerjohn posted:
Larry Sr. posted:

I have no idea why I said 21??? right after I counted 24 .......a dumb moment.

I really can count

Sure you can, right up to 20 and then you run out of fingers and toes!   No wonder you stopped at 21.

OK, just having a little fun.

I have to take off my pants to get to 21. 

rtr12 posted:
gunrunnerjohn posted:
Larry Sr. posted:

I have no idea why I said 21??? right after I counted 24 .......a dumb moment.

I really can count

Sure you can, right up to 20 and then you run out of fingers and toes!   No wonder you stopped at 21.

OK, just having a little fun.

I have to take off my pants to get to 21. 

Sure, but that's where Larry stalled.

I checked back, and saw I ordered my Benchtop Power adapter on July 28th.  I received it yesterday, August 23rd.  It came from China.  My one daughter buys a lot of art and craft supplies from the Orient, and this was a comparable time for delivery.  Mine will not accept double banana plugs, but I have only used those at work, so it doesn't matter to me.   I plugged the ATX power supply into it, but did not take the time to power it up.  Thank you John for letting us know this was available!

gunrunnerjohn posted:

Well, it's a 24 pin connector, not a 21 pin.

That's fine to remove the other wires.  I actually opened it up and clipped them totally inside and made sure they couldn't short to anything as well.

John,

Did you do anything specific to make sure the clipped wires inside couldn't short to anything ?

gunrunnerjohn posted:

Yep, I clipped them so close to the board that it would be impossible for the stub to short to anything.

That's what I tried to do as well, but some of the wires are almost impossible to reach, even with a small pair of diagonal cutters, because of the large caps and other components in the way. 

John,

Once I again I really thank you for your ideas & suggestions.  I ordered the PCBA and installed it on the following power supplies;  (they all work great, just plug it in!)

HIPRO Model HP-200NLXAA, 200w, 20 pin connector

Power Man, Model FSP235-60GT, 235w, 20 pin connector

Dell, Model CX305P, 305w, 24 pin connector

This is probably best bargain I got this year, only $8 each, WOW!  Thanks!!

 

rsymons posted:

what should the fuse amperage be?

From GRJ's first post in this thread. "The fuses are all 10A, but obviously can be changed for any value you see fit."  I didn't change the values on mine.  You can make that decision based on your application.

 

Cool idea. I'll have to keep a eye out for one of those.

I have used another source of high power 12V DC  power supplies should anyone need one. They are designed as LED Drivers. 

They are also very reasonable priced. I discovered them when a couple of club members asked if I could build them a frequency converter. Using a pure sine wave inverter to supply 60Hz power from our 50Hz mains supply. Having seen some I made for my own use.

This required a high amp 12V DC supply. And they always tended to be expensive in the past. However I was able to pick up a 400W 12V DC LED driver supply for less than £20 on EBay.

The plastic enclosure for the supply cost more! 

Nick

I use 6 or 7 computer power supplies all around the Choo Choo Barn layout.  I have all of my lighting, etc. going into a terminal strip so all I have to do is replace the supply and hook up the power leads, a 10 minute job.  I have 5 spares with spade connectors already attached to the wires waiting to be used.  They don't last forever but they last a long time.  Mine are on 8 hours a day, seven days a week.

 

Thanks to gunrunnerjohn for the tutorial.

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