Putting 4 leds in casing?

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hayabusafmw
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Putting 4 leds in casing?

Post by hayabusafmw » Tue May 15, 2007 8:03 pm

Where do i connect those

i want them to connect directly to the PSU

do i need a resistance?...
let me know

thanks!

^^

Lorelis-san
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Post by Lorelis-san » Wed May 16, 2007 11:40 am

If the LEDs are 5v, connect them to the 7805A regulator.

Looking at the NES board with the big metal box at the backright, the right pin is +5v, and the middle is ground. Oh, and the regulator has 3 pins - And is on the front of the metal box

Though don't wire the LEDs wrong unless you're a pyromaniac who doesn't mind possibly wrecking a NES or some LEDs, 'cause it could kill your NES.

And you might need a resistance, though you may not, I dunno - Not got that far in tech studies yet

EDIT:Put wrong part number for regulator

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jeep
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Post by jeep » Wed May 16, 2007 11:48 am

Well, to find the polarity and the 5V+ out and the gnd, just check those pin with a multimeter. It's not too complicated.


Jeep

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johnbjuice
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Post by johnbjuice » Wed May 16, 2007 2:05 pm

Put resistors in there! Otherwise you'll overload the LEDs and ruin them and maybe even the NES!

PM me!

- Juice 8)

Lorelis-san
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Post by Lorelis-san » Thu May 17, 2007 5:13 am

Oh yeah, I remember... Do you know the mA values of the LEDs?
If you do, let me know. I just remembered the stuff from Tech studies - which to tell you is a lot of crap here, I learnt more from ben's book!

But anyways, I remembered how to work out what resistance you need... I think. Enough resistance to drop the mA for each LED to the mA values, yet not so much that the LEDs are dark. Though I'm not sure if it'll work, but it's a good idea to ask someone who knows more to see if they agree with the value I'll work out

Zereo_XI
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Post by Zereo_XI » Thu May 17, 2007 7:03 am

Hi I have a Green 2.6V led(Took it from a Cereal Box Toy). Is there any place I could directly connect or is there any place to connect it will using a resistors? Or do I just have to check where there is a 2.6 or below voltage somewhere?

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jeep
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Post by jeep » Thu May 17, 2007 7:08 am

Lorelis-san wrote:Oh yeah, I remember... Do you know the mA values of the LEDs?
If you do, let me know. I just remembered the stuff from Tech studies - which to tell you is a lot of crap here, I learnt more from ben's book!

But anyways, I remembered how to work out what resistance you need... I think. Enough resistance to drop the mA for each LED to the mA values, yet not so much that the LEDs are dark. Though I'm not sure if it'll work, but it's a good idea to ask someone who knows more to see if they agree with the value I'll work out


No, it's drop the voltage, not the mA. Most LED use around 20 mA and between 1.8V to 3.6V (red to blue). Anyway, so let's says I have a 5 Volt source. I can put 2x LED in series or if I want to be safer, I can put 1 LED and a resistance. So Let's says I have a 2V led and a 5V output. I want the resistance to «eat» the 3V that won't be use by the LED. So I have mA rating of the LED (20mA). We have V=RI -> 3V=R*20mA

3V/(20*10^-3A) so I get 150 Ohms. You need to get a resistance near that value.

Jeep

Lorelis-san
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Post by Lorelis-san » Thu May 17, 2007 10:22 am

Ahhh, yeah.

Thanks for telling me that - that's something more I've learnt from the benheck site that I haven't even heard off in Tech Studies.

Though we'll still need hayabusafmw to tell us the voltage the LEDs need before the required resistance and how to wire it can be said

hayabusafmw
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Post by hayabusafmw » Fri May 18, 2007 12:43 pm

Thanks guys!!!

I will check that out! , try to find it myself
but im a zero in ''therm of voltage , & things like that''

if any could point me the Good place to solder the leds to.
I would appreciate it i don't wanna mess something at the end of the project

thanks!:)

Lorelis-san
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Post by Lorelis-san » Sat May 19, 2007 4:39 am

Lorelis-san wrote:...connect them to the 7805A regulator.

Looking at the NES board with the big metal box at the backright, the right pin is +5v, and the middle is ground. Oh, and the regulator has 3 pins - And is on the front of the metal box

Though don't wire the LEDs wrong unless you're a pyromaniac who doesn't mind possibly wrecking a NES or some LEDs, 'cause it could kill your NES...
Posted it before as seen up above

hayabusafmw
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Post by hayabusafmw » Sat May 19, 2007 10:08 am

i know it must have been discussed before....
but i tryed searching the forum before posting & didn't have any luck.,

Zereo_XI
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Post by Zereo_XI » Sat May 19, 2007 12:09 pm

Is the regulator the blue thing on the board?
Last edited by Zereo_XI on Sat May 19, 2007 3:43 pm, edited 1 time in total.

Lorelis-san
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Post by Lorelis-san » Sat May 19, 2007 1:07 pm

No, that's not the regulator - you removed it with the big metal box

Lemme go look in ben's book to find the spot you'd get it from

Found it - middle spot of the 5 connections you desoldered to get the huge silver chunky box off - which means if on your pic you number all the big solder points in the upper left 1 to 6, left being one, connection 4 is where you put 5v in the NES to run it, thus LEDs are perfect to be connected there

hayabusafmw
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Post by hayabusafmw » Sat May 19, 2007 3:15 pm

I got my leds now 1.9V

I got resistors too

How much do i need to put?
let me know

thanks!!:)
!!:)

Zereo_XI
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Post by Zereo_XI » Sat May 19, 2007 3:46 pm

I opened my NES found the regulator. 2 Questions:

1. Can I solder 2 wires and extend them for Extra Leds (2+)?
2. What those that regulator do really i didn't even see it touch anything?

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