[sdiy] power question

[Ken Stone]

SW +5 comes from Q1 - it is a switched +5 under the control of the
processor. Simply link all SW +5 points on the diagram together. Do not
connect them to anything else.
Ken
 
>Thanks everyone for your help,
>
>it's a midi analyzer with the SW +5v powering an LCD, some pullups and 
>an opto-isolator.
>the schematic is here: http://www.maxmidi.com/diy/viewport/view8x10.gif
>
>I'm not sure what in this circuit is generating the switched voltage.  
>I was also going to run it off of the +15v coming out of a blacet 
>supply through a simple voltage regulator using a 7805 instead of the 
>battery they've got... how would this effect SW?  would it then be 
>needed?  My understanding of a switched supply is that it's regulated, 
>thus good when something's running off of a battery.
>
>thanks
>-ted
>
>On Friday, April 11, 2003, at 10:51  PM, Paul Perry wrote:
>
>> At 09:30 PM 11/04/03 -0700, Ted Slominski wrote:
>>> i'm looking at a schematic that has both +5v and SW +5v.  I assume 
>>> that
>>> SW means standing wave, but how  would i generate that?
>>
>> ....it doesn't mean 'standing wave', believe me.
>> What kind of circuit is it?
>> Some mixed analog/digital circuits have separate supplies,
>> to stop noise on the digital line getting into the analog.
>>
>> paul perry melbourne australia
>>
>> (could also mean switched +5, for some reason).
>>
>>
>>
>>
>>
>>
>>
>
>
_______________________________________________________________________
Ken Stone   sasami at hotkey.net.au  
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