An LED, a light emitting diode, is a light source often used as an indicator.
1
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1answer
71 views
How to check if device is turned off
Is there a way to check if the Pi is off, without looking at the chip itself but with a LED or something like that.
0
votes
3answers
107 views
Power light but very dim act. No display or network output?
When connecting my pi via HDMI, I am getting no image. I can't see any additional devices on my network when connected via Ethernet.
LED panel has a strong red light on PWR, very dim green light on ...
4
votes
2answers
358 views
Controlling 400 LEDs from a raspberry pi
I have a client who has several large bronze signboards, each with 100-150 little light bulbs on it, totaling approximately 400 bulbs. The bulbs are turned on and off on a schedule, currently by hand ...
1
vote
2answers
107 views
Raspberry Pi LED confusion
I have had some issues with my raspberry pi. I went online to find some videos to try to figure out what is going on. I then noticed that their raspberry pies Have the LEDs OK, PWR,FDX,LNK and 100 (in ...
0
votes
1answer
141 views
Raspberry Pi Not turning on
I just got a raspberry pi in the mail from element 14. Its a model B. I also bought this SD Card to boot from. When I first put in my SD Card and plugged in my power the PWR led turned bright red, ...
2
votes
3answers
1k views
Controlling a 12V RGB LED strip with the GPIO
I have an RGB LED strip (specifically, this one - 1 meter's worth) and a 12V power supply to go along with it, since the raspberry pi alone can not power the strip. I am going to be using pi-blaster ...
0
votes
1answer
173 views
Raspberry Pi failed to boot, power led remains off
Connect my Pi model B to mac USB port. The power LED remains off. There is excessive amount of heat generated at the component highlighted in the pic. Any idea how to resolve?
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4
votes
2answers
400 views
Controlling many LEDs with few GPIO pins
I successfully completed my hardware "hello world" using this guide:
http://www.raspberrypi-spy.co.uk/2012/06/control-led-using-gpio-output-pin/
Now I'd like to move on to bigger and brighter ...
0
votes
2answers
2k views
Why Isn't My Ethernet Working?
I just got Pi Model B. I downloaded Wheezy on SD card and plugged in all of my cords. Everything works fine except the Ethernet port.
The LINK LED flickers for a second while booting up, but then it ...
5
votes
2answers
386 views
How can I turn the lights off on my pi?
I'd like to build a small internet radio out of my pi, but I'd like to use it at night, when the flashing LEDs would be disturbing. Is there any way to disable them?
3
votes
2answers
262 views
Connecting blue LED (3.3V)
I've recently started doing basic diode connections (red and green diodes). I've also got blue diodes, but there's one thing that prevented me from connecting them already, namely - the specs say ...
0
votes
2answers
604 views
Is it possible to connect an LED directly to the GPIO of the Pi?
I was wondering if it is possible to connect an LED directly to one of the GPIO pins of the Pi? The reason I ask is that, I have read from many sources that if I am not using some sort of break out ...
2
votes
4answers
687 views
Pwr LED is solid red, OK LED flashes green once, no display
Power is good - I've tested with a voltmeter. According to this link, the SD card image is not written properly yet:
The Raspberry Pi cannot find a valid image on the SD card. Check card is ...
0
votes
0answers
357 views
RPi.GPIO turns pin on at setup
I have an LED connected to a GPIO pin and am using RPi.GPIO to control it.
When setting up the GPIO pin, the LED blinks on ever so slightly when being initialized, which I don't want.
import ...
4
votes
2answers
2k views
What's the Difference between Raspberry Pi and Arduino?
This question stems from a large lack of understanding, but it concerns a project I've wanted to do for a while.
This is an Instructables page for an 8x8x8 led cube, and the 70th step addresses the ...
6
votes
4answers
3k views
Wiring RGB LED's
I was wondering if it is possible to connect 8 individual RGB led's much like the adafruit strip. I saw the Pumpkin Pi project and would like to build one. I don't have any yellow or red LED's, but ...
7
votes
2answers
771 views
What do I need to simulate traffic lights using LEDs?
So I'm making a model that simulates traffic lights (Red, Amber, Green) so there will be three LEDS that need to be preferably extendable (I don't want them attached directly to the breadboard) but I ...
16
votes
1answer
5k views
What do system LEDs signify?
There are 5 status LEDs on the Raspberry Pi board. While I can guess what the POWER LED signifies (the power being attached), I am not sure about other four.
So, what do OK, FDX, LNK and 10M signify?
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24
votes
2answers
4k views
How do I control the system LEDs using my software?
There are 5 LEDs on the RPi: OK, PWR, FDX, LNK, 10M.
I'd like to know if it's possible to control any of these from software i.e. turn them on, or change intensity (or even change colour gasp).
And ...
6
votes
2answers
434 views
Visual/audio status/activity indicators
What, if any, indicators of system status or activity are available on the R-Pi?
Audio - I'm talking about a beep when it's turned off, or a series of beeps indicating POST information etc
Video - ...
