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Author Topic: 12v to 9v  (Read 2351 times)

Offline SimplyDead

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12v to 9v
« on: January 14, 2012, 11:10:51 PM »
what resistor would I need to make a 12v to a 9v 2200mah going to be trying the lcd screen in xbox 360 mod
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Offline hyper999

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Re: 12v to 9v
« Reply #1 on: January 15, 2012, 03:45:17 AM »
You don't want a resistor.

You want a voltage regulator, I am unable to recommend what type unless you tell us the current needed (in mA or A).
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Offline SimplyDead

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Re: 12v to 9v
« Reply #2 on: January 15, 2012, 08:06:10 AM »
trying to power a lcd screen and it needs 9v,s but theres only 12v 5v and 3.3v on the motherboard so a regulator will downstep it from a 12v to 9v?
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Offline FOOKz™

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Re: 12v to 9v
« Reply #3 on: January 15, 2012, 06:27:35 PM »
Use three 9v regulators in parallel to get 3amps of current output. http://www.parts-express.com/pe/showdetl.cfm?Partnumber=7809


PLEASE USE A REGULATOR!!!



but... you can cheat and get away with not using a regulator or a resistor... I do NOT recommend this but hear me out.

Use the +12v as Positive and the +3.3v as ground...

ok why?...

12 - 3.3 = 8.7

You will have an 8.7v potential difference.



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Offline Modded Matt

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Re: 12v to 9v
« Reply #4 on: January 16, 2012, 05:15:43 AM »
Quote from: FOOKz™ on January 15, 2012, 06:27:35 PM

PLEASE USE A REGULATOR!!!
[/color]


but... you can cheat and get away with not using a regulator or a resistor... I do NOT recommend this but hear me out.

Use the +12v as Positive and the +3.3v as ground...

ok why?...

12 - 3.3 = 8.7

You will have an 8.7v potential difference.






we are not talking in logic, we are talking in real world practicality,

use a voltage regulator.
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Offline nEoVaLoR

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Re: 12v to 9v
« Reply #5 on: January 16, 2012, 02:17:26 PM »
Quote from: FOOKz™ on January 15, 2012, 06:27:35 PM
Use three 9v regulators in parallel to get 3amps of current output. http://www.parts-express.com/pe/showdetl.cfm?Partnumber=7809


PLEASE USE A REGULATOR!!!



but... you can cheat and get away with not using a regulator or a resistor... I do NOT recommend this but hear me out.

Use the +12v as Positive and the +3.3v as ground...

ok why?...

12 - 3.3 = 8.7

You will have an 8.7v potential difference.

Interesting... This is why I wish I knew more about electricity.
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