LEDs

Includes Atari 2600, Nintendo 8-bit, Sega Master System, MSX and more!

Moderator:Moderators

Post Reply
User avatar
Joes2Silly
Posts:1345
Joined:Mon Apr 04, 2005 8:19 pm
Location:SA, TX
Contact:
LEDs

Post by Joes2Silly » Sat Apr 16, 2005 8:56 pm

i was going to add some leds to my NES and I was wondering where to
solder them :?:

User avatar
nos_slived
Higher Idiot
Posts:3476
Joined:Mon Mar 21, 2005 6:32 pm
Location:Burnaby, BC, Canada
Contact:

Post by nos_slived » Sat Apr 16, 2005 11:03 pm

Solder the positive side to the 5V from the 7805's "O" pin, and the negative leg to the grounding strip along one of the sides, going though a resistor. It should look like this:

Code: Select all

7805(O pin)-------LED-----RESISTOR------Grounding strip
The resistor can go on either side of the LED, but it has to be equal to or greater than the value found using this formula:

R=(B-F)/I
R is the minimum resistor value you need, P is your battery voltage, F is the voltage used by your LED, and I is the max current that your LED can handle.

I have to save that formula and description, because I am tired of typing it out.
Image

User avatar
Joes2Silly
Posts:1345
Joined:Mon Apr 04, 2005 8:19 pm
Location:SA, TX
Contact:

leds

Post by Joes2Silly » Sun Apr 17, 2005 7:43 am

can you show me a picture of you are talking about :?:

User avatar
TheTooth
Posts:47
Joined:Fri Mar 11, 2005 6:15 pm
Location:Seattle
Contact:

Re: leds

Post by TheTooth » Sun Apr 17, 2005 10:27 pm

Joes2Silly wrote:can you show me a picture of you are talking about :?:
what is it you don't get? the 7805 linear voltage regulator maybe? Do you own ben's book?
- Peace in the Middle East!

User avatar
Joes2Silly
Posts:1345
Joined:Mon Apr 04, 2005 8:19 pm
Location:SA, TX
Contact:

leds

Post by Joes2Silly » Mon Apr 18, 2005 3:14 pm

no I don't own Ben's book :(

User avatar
nos_slived
Higher Idiot
Posts:3476
Joined:Mon Mar 21, 2005 6:32 pm
Location:Burnaby, BC, Canada
Contact:

Post by nos_slived » Mon Apr 18, 2005 5:03 pm

What part don't you get? I can't explain it any simpler than that, and I can't find any pics that clearly show the 7805.
Image

Niku-Sama
Posts:330
Joined:Tue Apr 05, 2005 6:21 pm
Location:Deadford OR
Contact:

Post by Niku-Sama » Mon Apr 18, 2005 6:48 pm

its possible to piggyback off the power led aswell....just be careful not to put too much of a load on it

maddox
Posts:69
Joined:Sun Apr 17, 2005 2:28 pm

Post by maddox » Tue Apr 19, 2005 8:53 am

if you piggyback them make sure that all the LEDs from the same kind.

explanation:

green standard LEDs need less power then blue superbright LEDs
you can't mix em without some more resistor(s).

Post Reply