79Views1Replies

Author Options:

Slightly larger LED project. Answered

Ok, so to start off I have done a few very small led projects before. And for some reason I decided I was going to up the concepts and baptismal by fire. Well to say the least I have a few questions. So all that read and help thanks!

The Project:
I have included a picture in very horrid crayola color to show you kind of what I am trying for. Essentially I am making a 6ft x 4ft robot head. I have built a frame (the picture) and there is going to be a spandex (or screen depending on what I decide) canvas with the bots head on it. What I want to happen is when I press the button (momentary contact) on the controller it activates the appropriate leds that light up a box. I will have at most 5-6 buttons pressed at once. Simple enough. The squares are going to have 18, 3mm leds. The colors are shown in the pic. I know that different colors require different volt, thus different resisters. The eyes are going to have 2 sets of 18 leds for alternating colors. There will also be 2 outside sets of lights to shine upon the face (18 leds also).

"The Questions:"
Well other than just asking HOW THE WHAT? I'm going to have this (or at least I want it to be) powered by one source. Maybe a 12v AC adapter. The problem is, is this enough? How many amps do I need to power 218 leds? I guess what I am saying is I know the basics but I need help with the electrical rating part of all this.

Discussions

0
None
Foreverhex

10 years ago

So I've been doing a bit of research and I think the each square (light bar) needs to have at least 360ma (.36A) . Does this sound right. I don't know if I should get 9-10 different power supplies because I don't want to blow the leds.