Putting 4 leds in casing?

Lorelis-san · Post by **Lorelis-san** » Sat May 19, 2007 4:00 pm

@hayabusafmw
If you can find out the resistance or ampage the LEDs are, I'll get all the values done for you

@Zereo_XI
1. If you mean having 2 LEDs in a circuit, and are asking if you can have several, you can, it'll just increase how much power you use - you won't need to worry unless you're using a battery or anything, then it's not much to worry unless it's 100 LEDS or something like that
2. Regulates 9v down to 5v the NES board uses - if you hooked the board directly to 9v, it would kill the board, or at least some components. It's like mains - 230V directly into almost any circuit of something which runs on mains will kill it with fire. Or at least make some smoke, or make something melt. It's explained in Ben's book

Zereo_XI · Post by **Zereo_XI** » Sat May 19, 2007 4:10 pm

Thanks so hooking up wires to it then putting resistor to make the 5V lower will work ok thanks I appreciate. Oh Can I just use any type of non-Copper wire? Ex:just strip a wire from a old Headset and use that.

hayabusafmw · Post by **hayabusafmw** » Sat May 19, 2007 4:54 pm

The leds are written 1.9v

& resistors... i cannot say what they are...

Thanks!! a lot!

Lorelis-san · Post by **Lorelis-san** » Sat May 19, 2007 5:43 pm

@hayabusafmw
No, by resistance, I meant the resistance of the LEDs. or mA. Every component has a resistance - this defines how much voltage it gets in the circuit. Hard to explain.

@Zereo_XI
Ummm... You use a resistor, not a transistor to lower the voltage - A transistor will do nowt to the voltage, and may even make a tiny explosion.
And yes, headphone wire will work - otherwise how would you get sound through it?

Zereo_XI · Post by **Zereo_XI** » Sat May 19, 2007 9:44 pm

Thanks Lorelis for you help I will be going at "La Source/Radioshack" Tomorrow Getting myself Blue Led(Power Light), Green Led, 170 ohm resistor
(Eat 3.4V for 2.6V green led) and solder thanks man + I found a Weller Solder Gun in my Step-Dad Working area.

Lorelis-san · Post by **Lorelis-san** » Sun May 20, 2007 7:46 am

No problem, man.

And I recommend that you use a 40 or 15 watt soldering iron and desoldering iron - you need precision for soldering and desoldering

Zereo_XI · Post by **Zereo_XI** » Sun May 20, 2007 8:00 am

Thanks then il buy a soldering Iron to + I guted a unofficial PS1 controler(Broken) which had Turbo so i got myself a Switch(Nes Overclock) and 7 1meter long wires all of dif color.

hayabusafmw · Post by **hayabusafmw** » Sun May 20, 2007 1:32 pm

AHHHH Dumb me!!

very sorry

my leds are written on a little paper

1.9V @ 30 ma

what i want to do is put 4 inside the casing. so they will be all Wired to each other

By the way Wich leg is the Contact leg? , shorter one or longer one? i always forget...

& where do you put the risistors? to the long leg or shorter one?

+ where would be the best way to Wire them too?...

Theres like 5 pins that comes out of the PSU , & like 4 other big chunky connections for the PSU to stay on the board. i need to figure which do what...

thanks!:)

Lorelis-san · Post by **Lorelis-san** » Sun May 20, 2007 3:34 pm

You'll need 2 sets of 2 paralell wirings connected to the spots I said for it to work.

Now to calculate the resistances -
v=5v
i=0.03a
rt=v/i
rt=166 2/3

v=1.9v
i=0.03a
rl=v/i
rl=63 1/3

r1=rt-2rl
r1=166 2/3-(2x63 1/3)
r1=40

40 ohms is what you'll need. Which is yellow-black-black if you're using a single resistor.

Thus, to wire, you'll need 2 sets of 2 LEDS and a 40 ohm resistor each. As to which is the anode and cathode(positive and negative), I can't remember, sorry

Zereo_XI · Post by **Zereo_XI** » Sun May 20, 2007 4:37 pm

Befor starting i want to know which one is going to work:

or

So is the energy divided or its stay the same for every led I add?

hayabusafmw · Post by **hayabusafmw** » Mon May 21, 2007 12:15 pm

Okay i connected my leds together

I decided to try with 1 resistor only

I made them all Good in the case tested with a 9volt for 7 mins

works like a charm

now i Connected them The + to the RIGHT pin (of the 5 inside the nes)

& the - to the Center one of the 5 = the 3rd (of the 5 inside the nes)

& what i get is When i Just plug the AC adapter ... the Leds SHINE GREAT

then when i push power The leds go Dim dim....
almost closed.....

jeep · Post by **jeep** » Mon May 21, 2007 1:16 pm

Zereo_XI wrote:Befor starting i want to know which one is going to work:

or

So is the energy divided or its stay the same for every led I add?

None of those, first check the wiring of the 7805A, Usually, you connect the + and the middle lead. Also, you have to use one resistor for each set of led you use. Because putting 2 set in parallel while use more mA. To calculate the resistor, you can see that site:
http://led.linear1.org/led.wiz

Also, to understand how electricity behave, you should check Kirchoff's Law at :
http://en.wikipedia.org/wiki/Kirchhoff's_circuit_laws

Here's how you'd wire 2 led to a NES motherboard:

If you want to put more led, for example 4 led, you put two series of resistor+led+led.

Jeep
.

hayabusafmw · Post by **hayabusafmw** » Mon May 21, 2007 1:47 pm

this is exactly what i did but i connected it on the other side of the 3 pins so it wouldn't show.......
i connected the + on the right side & - in the middle.....

& now i get just plain nothing.... on the leds..

jeep · Post by **jeep** » Mon May 21, 2007 1:55 pm

Hum your led are probably screwed. You sended 12Volt AC into them instead of the 5V DC of the regulator. Pretty sure you'll need some new led

hayabusafmw · Post by **hayabusafmw** » Mon May 21, 2007 2:17 pm

Ah....?
christ

I will rewire some then......