12v > 5v Resistor value...

[Jim]

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 ?

[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

[Jim]

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.

[ionicle]

VIR is the formula i learnt in physics

voltage = current x resistance

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

just for future reference