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  #11  
Old 14-11-07, 12:50 PM
JN JN is offline
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Join Date: Mar 2005
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Quote:
Originally Posted by name='K404'
VRM:

12V in, 5V out:

L78S05.

Using resistors to drop the voltage through a voltage divider rule can be hit and miss as you design for one, set, load resistance. Its not so versatile.

K
You sir, are a gem

Turns out the local maplins has 2 in stock as well

Just one Q...how do you know what pin is +12v, +5v, 0v ?

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  #12  
Old 14-11-07, 01:12 PM
K404 K404 is offline
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looking at that pic, the legs are: output, ground, input.

Thats upside down, but thats neither here nor there....

You might wanna get a heatsink for it- Im using one to power 3 fans and its a bit burny burny.

Here to help

K
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  #13  
Old 14-11-07, 01:20 PM
JN JN is offline
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Join Date: Mar 2005
Posts: 13,678
Quote:
Originally Posted by name='K404'

looking at that pic, the legs are: output, ground, input.

Thats upside down, but thats neither here nor there....

You might wanna get a heatsink for it- Im using one to power 3 fans and its a bit burny burny.

Here to help

K
Cheers dude. I'll only be pulling 320mA thru it so hopefully it wont get too smokey.

I might use some thermal adhesive to glue it to the metal bracket of this fan controller tho.
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  #14  
Old 14-11-07, 02:02 PM
ionicle ionicle is offline
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Location: Bridlington, East Yorkshire, UK
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VIR is the formula i learnt in physics

voltage = current x resistance

which when rearranged equals voltage / current = resistance...

just for future reference
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