steps question..
Jul 15, 2005 at 2:55 AM Thread Starter Post #1 of 9

James281

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could someone tell me which one is which? i am a newbie to this diy and almost done with my steps power supply.

is this diagram below correct?
ground-volt.gif
 
Jul 15, 2005 at 7:53 AM Post #3 of 9

peranders

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A wire like this has normally some polarity marking but this is only as a help when you connect. If you can't get different colours on each wire you can print some black dots or stripes or make the plastic a bit unsymmetrical. Compare how a speaker wire looks llke.

The answer to you question is: It doesn't matter.

If the cable already is connected in the other end it will matter of course.
 
Jul 15, 2005 at 2:42 PM Post #4 of 9

James281

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Quote:

Originally Posted by PeterR
Uhm, what's on the other end of the cable?


sorry, that is a DC power cord with a 5.5/2.5mm barrel connector.
this is what i got. http://rocky.digikey.com/WebLib/CUI%...ta/CA-2186.pdf


Quote:

Originally Posted by peranders
A wire like this has normally some polarity marking but this is only as a help when you connect. If you can't get different colours on each wire you can print some black dots or stripes or make the plastic a bit unsymmetrical. Compare how a speaker wire looks llke.

The answer to you question is: It doesn't matter.

If the cable already is connected in the other end it will matter of course.



the wire does have a stripe on it like in the diagram but the other wire just have text telling its a 18ga. wire that's it.

i'm thinking the one with the stripe is a ground wire represent negative
confused.gif


another question i have is, i am using a onboard fuse, but accidentally bought a IEC power inlet module with the fuse holder and so i have 2 fuses is this going to effect the board? i solder the wire like i would use an onboard fuse.

i plug the it in the other day everything seem fine, no blow or fire
biggrin.gif
, kinda strange the thing doesn't even heat up, not even a little warm, i only did test points 1 and 2 and get 39V with no load on the power supply.

when unplug the led still stay on for around 30second or so..

is this normal ??
 
Jul 15, 2005 at 2:56 PM Post #5 of 9

peranders

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Quote:

Originally Posted by James281
i'm thinking the one with the stripe is a ground wire represent negative
confused.gif



If you read the datasheet you will see how it is connected in the connector and if you will have ground in the outer connctection, you will also have ground in the striped wire. Check the text right under the connector.

24 VAC will generate 32-35 volts DC and if the transformer is small (weak) you can end up with nearly 40 VDC, unloaded. Something to beware of.

If the PS has no bleeder resistor it can stay charged for minutes or even hours, days also.

Two fuses doesn't matter, use both!
 
Jul 15, 2005 at 3:34 PM Post #7 of 9

James281

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Quote:

Originally Posted by PeterR
Ah, ok. So what does that cable plug into?
wink.gif

You have to wire the cable up according to what the device you're powering needs. Often there will be a small drawing next to the power input jack...




biggrin.gif
i found the answer thanks, i am building this steps for my millett hybrid
biggrin.gif
i think i jump into this DIY a little too fast.

i look at the schematic for the wire again and saw that symbol

black wire ---(●--- stria wire
biggrin.gif
that's my answer.

thank you guys!

this is my gallery
www.vnforum.com/gallery
 
Jul 15, 2005 at 3:44 PM Post #8 of 9

PeterR

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Quote:

Originally Posted by James281
i think i jump into this DIY a little too fast.


Hey, from the pics it looks like you're doing a very neat job!
 
Jul 15, 2005 at 4:34 PM Post #9 of 9

James281

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Quote:

Originally Posted by PeterR
Hey, from the pics it looks like you're doing a very neat job!


biggrin.gif
thanks, 5-6yrs ago i used to work as a solder rework tech so i have no problem solder this stuff. the only trouble i have is figure out which wire go where and pictures and things people posted in this forum are very helpful.
 

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