[Dixielandjazz] You'; ve probably have the answeres already but just in case....

[Richard Broadie]

Hi Gordon,

  Going back to ohms law, if the potential (voltage is correct) and the load 
(resistance) is determined by the input load of the keyboard, the resultant 
current drawn is a funciton of this relationship and not a function of the 
current available.  In this instance the keyboard should only draw 35 mA 
even thought the power supply could provide for a much greater load.  So 
long as the voltage is correct and sufficient current is available, there 
should be no problem.  Am I wrong?   Dick  Broadie
----- Original Message ----- 
From: <GWW174 at aol.com>
To: <jazzboard at hotmail.com>; <dixielandjazz at ml.islandnet.com>
Sent: Monday, October 31, 2005 8:04 PM
Subject: [Dixielandjazz] You'; ve probably have the answeres already but 
just in case....


> ma are milliamps or 1/1000 of an ampere which is a quantity of 
> electricity.
> If something requires 35 ma's and you have a source which provides 1,000 
> ma's
> you have more than what it needs.  You also have to make sure the voltage,
> which is a measurement of how hard you blow into your horn or the force of 
> the
> electricity, is the same.  Whereas ma milliamps is a measure of how much 
> wind
> you have, volts is how hard you are blowing.  If you blow too hard, you 
> can
> damage whatever it is you are blowing into.  If you don't have enough wind
> (milliamps) it ain't gonna work no matter how hard you blow.
>
> You are not out of the woods yet.... You can either blow or suck - 
> otherwise
> known as polarity which is the direction the electricity flows.  Most 
> power
> supplies or equipment (if it is DC powered) will show the PLUS as being 
> either
> the center conductor or outside conductor on the little power plug.  It is
> important that whatever power supply you use, that you make sure the 
> polarity is
> correct.  Radio Shack makes a number of universal power supplies which 
> allow
> you to change the voltage as well as the polarity of the connection so 
> that you
> can either blow or suck - depending on what is required by the equipment.
>
> In review,.... the voltage (force of the blowing into your horn) must the 
> be
> same.... you must have an ample source of wind - a power supply that can
> supply more ma's than you need.... and the direction of the blowing must 
> be the
> same as needed to make music.  You either blow into your horn or suck air 
> from
> your horn.
>
> Hope this helps....
>
> Gordon of Northridge
> Gordon
> _______________________________________________
> Dixielandjazz mailing list
> Dixielandjazz at ml.islandnet.com
> http://ml.islandnet.com/mailman/listinfo/dixielandjazz 



-- 
No virus found in this outgoing message.
Checked by AVG Free Edition.
Version: 7.1.362 / Virus Database: 267.12.8 - Release Date: 11/3/2005