Modular power...

[Tom Adam]

You mean this:
http://www.cgs.synth.net/modules/cgs63_psd.html

When my system used to be a bit smaller, I used one big PSU and the 
power delay module. Worked really well.
But than I got to buy a couple of smaller PSU's on ebay...

Just buy a new PSU.

Cheers,
ToAd


Op 9-5-2011 7:02, Tony Scharf schreef:
> Well, it gets more interesting with my PSU problem.
>
> I did some troubleshooting today, and it seems that when the unit is
> on its only drawing about 1a which is well within the normal operating
> parameter of the PSU.  The problem is that on start up, this spikes
> way up causing the PSU to think its overloaded and the PSU goes into
> some kind of shut down mode as a safty feature.
>
> I should add this only happens on a warm start.  On a completely cold
> start, everything powers up normally.  My thought is (and I could be
> very wrong) that the resistance is slightly higher in the colder
> system, enough that it slows down the peek current draw allowing the
> system to start up.  Once started, everything is fine...but if I power
> down and install a module without letting it fully cool down (like I
> did when I first noticed this problem) I get the start up peak
> problem.
>
> So...my question is this:  could it be cheaper to put in switches for
> each buss board, so that I could manually delay their power up or is
> there some kind of circuit I could install that would do this for me?
> something I could put between the buss boards and the psu and set each
> to a slightly different delay (probably a few milliseconds is all it
> takes).  Or is this a completely unsafe thing to contemplate, and I
> should just buy a new PSU as I had intended?
>
> Tony
>
> On Sat, May 7, 2011 at 4:32 PM, Tom Adam<tom.adam at thebigear.be>  wrote:
>> Have a look at the Power One PSU's.
>> Power One #HBB15-1.5-A
>> Power One #HCBB-75W-A (huge)
>> They can give +/-12V or +/-15V.
>> I've got two of each. Bought cheaply on Ebay. I like them since they
>> don't make any sound. I hate buzzing transformers.
>>
>> You can easily measure the current yourself. I made a small pcb just for
>> that. But be careful, I once blew up a couple of IC's by disconnecting
>> the -Ve rail when measuring.
>>
>> And if you're not sure any more of the PSU, buy a new one. It is the
>> hart of your modular, consider the damage when it really blows up...
>>
>> Cheers,
>> ToAd
>>
>> Op 7-5-2011 23:10, Tony Scharf schreef:
>>> Yeah, It ran perfectly till today.  What really sucks is that about
>>> half the moldules in my rig dont have their current draw in their
>>> documentation (or documentation at all in some cases...).
>>>
>>> I can get things working, but only if I pull out more than I just put
>>> in.  I think I may have blown something.
>>>
>>> I am going to look for a way to move the PSU external to the case, and
>>> get something with some more beef to it than the stock (if thats
>>> possible...this is not exactly my expertise).  Here is to hoping..
>>>
>>> Tony
>>>
>>> On Sat, May 7, 2011 at 3:32 PM, Tom Adam<tom.adam at thebigear.be>    wrote:
>>>> They always told me you should only load the PSU for 70 to 80%. So
>>>> driving it at the limit might not be a good idea.
>>>> Check the SDIY archives for the tech talk.
>>>>
>>>> I have 4 Pro One PSU's in my modular. Load is between 45 and 80% and the
>>>> thing seem to run perfectly.
>>>>
>>>> ToAd
>>>> (Back to the bi annual calibration session of my modular)
>>>>
>>>>
>>>> Op 7-5-2011 21:19, Tony Scharf schreef:
>>>>> So I did what every noob does and bought more modules than his power
>>>>> supply can handle.  Its rated at 1200mA and actually has been running
>>>>> fine at 1300...but one module I bought pushed it over the top.
>>>>>
>>>>> Rather than shelling out for a new case right now, I was wondering how
>>>>> much DIY work it would be to pull out the PSU I have, and connect up
>>>>> something like an external 2000mA power supply to get the extra
>>>>> headroom?  The case is almost full, and I am really only a little
>>>>> short.  In my mind, it seems like it would be easy as taking out the
>>>>> current PSU and wiring it in same as my old board. Of course, I could
>>>>> be wrong...
>>>>>
>>>>> Tony
>>>>>
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>>>>
>>>
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