[sdiy] BIG PSU ISSUES

[Dan Snazelle]

I have a nice powerone supply. its a 12volt or 15 volt +/- volt. I am running it at 12 volts and without a load i used the trimmers to set it for 12volts.

i think this model can handle at least .5 amps per channel. i think actually .75 (in +15/-15 mode it handles less amperage)

now when i hook up my current project, which is three giant breadboards (of mainly CMOS low draw chips) to my STAR breadboard (which is the PSU hooked up to a breadboard which everything else plugs into with 22r resistors as fuses), and i take a reading of the VOLTS of my project i get a reading of 9 volts.

My questions

1. there are trimmers on the PSU to push it back up to almost 12 volts post load..should i do this? or are the trimmers only for PRE LOAD?
2. how can i get around this? could my PSU be messed up?

3. i know these are low amp chips. i only have ONE led on the entire project. there are some opamps.
is load voltage not the same? do i not need to worry? or should i get a measured 12 volts? and -12 volts?


thanks so much







--------------------------------------------
check out various dan music at:

http://www.myspace.com/lossnyc


http://www.soundclick.com/lossnyc.htm


http://www.indie911.com/dan-snazelle
(or for techno) http://www.myspace.com/snazelle


> From: philip.macphail at ntlworld.com
> To: neil.johnson97 at ntlworld.com; synth-diy at dropmix.xs4all.nl
> Subject: Re: [sdiy] Another SSM2164 question
> Date: Wed, 13 Aug 2008 21:49:04 +0100
> CC:
>
>>>
>>
>> Thanks, and cheers. Now working on schematic entry and then a PCB.
>> Thanks to an A3 laser printer from a local Freecycler (who, ironically
>> is/was on the list as well - hi Phil!) I can now print out my
>> schematics
>> BIG!
>>
>> Neil
>> (likes his diagrams in A3)
>>
>
> Hi Neil,
> Yes I'm still here, and to add to the irony, I have a half-finished
> VCO based on the SSM2164. The shunt R-C networks on the input that
> started this thread were a real pain to accommodate with surface-mount
> components, unless they were put on the back of the board. The larger
> DIL version would make things much easier.
>
> Phil (happy with A4 schematics)
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy