Tagged Questions

1
vote
1answer
56 views

Multiplexing large LED matrix

I have a project which involves building a 64 x 48 (3072) LED matrix driven by a Raspberry PI computer. I am a first-year computer engineering student so I am still inexperienced with shift registers ...
1
vote
3answers
71 views

Higher resistance resistor in place of higher wattage?

Engineering newbie here. I'm fairly sure I already know the answer to the question, but I figure I'll ask anyway. I've got an LED lying around, that according to an LED calculator requires a 80R 1/2w ...
1
vote
1answer
72 views

Interactive Single Color LED Matrix

I'm trying to build an LED matrix (32x16) that lights up in certain areas in response to movement, as detected by another matrix (8x16) of infrared phototransistors. Here's where I'm at: Main ...
6
votes
3answers
797 views

Miniature Traffic Light with Raspberry Pi: Wiring many LEDs

Background: I am a Civil Engineer specialized in traffic control devices and I have a small hobby project to build a scale model traffic light system. I can manage and control the traffic light ...
0
votes
0answers
177 views

Raspberry Pi to Digital LEDs, No Soldering

I have a Raspberry Pi laying around right now that I'd like to put to use, and I'm also going to be buying a string of digital LED pixels from Adafruit (the string of 25 WS2801 pixels). I know I can ...
0
votes
0answers
416 views

How to Create an RGB LED Display for Raspberry Pi?

I'm relatively new to hardware. I have some basic concepts down and I've only done some basic circuitry, but I really want to jump into the deep end - it's how I learn best. I'm not sure how simple ...
1
vote
2answers
1k views

Arduino/Raspberry Pi 2 LED Matrices

Does anyone know if I can use a single Arduino or Raspberry Pi to control two 32x32 LED matrices as sold on the Adafruit website? Here is a tutorial where you can wire the 32x32 matrix. Ideally, I'd ...
2
votes
1answer
225 views

Zigbee RGB control using Xbee

In order to achieve this I was going to have the following setup: Base Station Raspberry Pi Xbee 2mw Led Station Xbee 2mw RGB LED http://www.pololu.com/catalog/product/1222 My main ...
5
votes
3answers
316 views

Using larger resistor values

I'm connecting a Raspberry Pi to an LED and this video tutorial says that I need 270 Ω resistors. I only have 100 Ω, 1 kΩ, and 10 kΩ resistors with me. Is it okay if I use the 1 kΩ resistor?
3
votes
3answers
2k views

Raspberry Pi wiring simple LED

I'm completely new to hardware in general. I just got a raspberry pi and was messing around trying to get an LED to light up. I have everything wired like the picture below. I am using a 330ohm ...