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Alternate power source for single light led push buttons

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kyomagi:

--- Quote from: Nephasth on May 25, 2012, 02:38:00 pm ---What are you running? A console?

But if you do use your spare computer PSU, you can jump the green wire to ground on the motherboard connector to turn the PSU on. Then just wire your + leads of your LEDs to a yellow wire of one of the Molex connectors and your grounds of your LEDs to a black wire of the same Molex connector.

--- End quote ---

I am running a "special" xbox 360

Can i run all 16 positives and negatives to one molex?

I dont understand "you can jump the green wire to ground on the motherboard connector to turn the PSU on" what you meant there.  I was going to power on the psu with its plug in my cab

Molton, from my understanding, the psu will run at 200w, but will only draw in the voltage demand. 

Nephasth:

--- Quote from: kyomagi on May 25, 2012, 02:52:56 pm ---
--- Quote from: Nephasth on May 25, 2012, 02:38:00 pm ---What are you running? A console?

But if you do use your spare computer PSU, you can jump the green wire to ground on the motherboard connector to turn the PSU on. Then just wire your + leads of your LEDs to a yellow wire of one of the Molex connectors and your grounds of your LEDs to a black wire of the same Molex connector.

--- End quote ---

I am running a "special" xbox 360

Can i run all 16 positives and negatives to one molex?

I dont understand "you can jump the green wire to ground on the motherboard connector to turn the PSU on" what you meant there.  I was going to power on the psu with its plug in my cab

--- End quote ---

Most power supplies don't turn on with out a signal from the mobo. They get the signal when the green wire is grounded. So if you plug in your PSU and turn the switch on (if it has one), it most likely will remain off until you ground that green wire. And yes, you can wire all 16 LEDs to 1 Molex connector.

Nephasth:

--- Quote from: molton on May 25, 2012, 02:49:39 pm ---Here's a tough question, if you hook up a computer power supply to power some leds only, will the power supply be drawing the 250W-1000W it's rated for or will it be more efficient? Does it vary from power supply to power supply?  Using a PC power supply to light 16 led's could potentially be a huge waste of power.  take a look at some of the led drivers they have at ledsupply.com, even if you have to drop $40 on a 12W power supply, the energy saving costs could far outweigh the price, if in fact the power supply is pulling 100 Watts or more.

--- End quote ---

It won't be drawing that wattage... That's like saying if you flip a light switch "on" and there is no bulb in the socket, it's still using power... Almost no load is present (except the PSU fan) until you connect components that use the power.

kyomagi:
How should i ground that green wire?  Just connect to a metal plate?  sorry its been a while lol. 

Now each led is 12v each, will a cheap 200w psu be enough?

capsule:

--- Quote from: Nephasth on May 25, 2012, 02:57:53 pm ---
--- Quote from: molton on May 25, 2012, 02:49:39 pm ---Here's a tough question, if you hook up a computer power supply to power some leds only, will the power supply be drawing the 250W-1000W it's rated for or will it be more efficient? Does it vary from power supply to power supply?  Using a PC power supply to light 16 led's could potentially be a huge waste of power.  take a look at some of the led drivers they have at ledsupply.com, even if you have to drop $40 on a 12W power supply, the energy saving costs could far outweigh the price, if in fact the power supply is pulling 100 Watts or more.

--- End quote ---

It won't be drawing that wattage... That's like saying if you flip a light switch "on" and there is no bulb in the socket, it's still using power... Almost no load is present (except the PSU fan) until you connect components that use the power.

--- End quote ---

Ditto. The indicated power is the MAX available power, not the power it's using when running idle.

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