Tagged Questions

Output refers to any PHYSICAL output from the Raspberry Pi. There are four main outputs: GPIO, HDMI, RCA and Audio.

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1
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1answer
49 views

The Composite Video on my Raspberry Pi isn't working

I run the commands /opt/vc/bin/tvservice -o /opt/vc/bin/tvservice -c "PAL 4:3" and the screen changes from the default "no signal" screen to a black screen. This shows me that the reaspberry pi is ...
2
votes
1answer
148 views

I2Cs for temperature senors and multiple PWM outs

EDIT: Rewrite, this is why you don't write questions after not sleeping for two days (wait what day is it?) I have a whole bunch of 12V 4 pin (pwr, grnd, tach, pwm) fans I'd like to manually control, ...
1
vote
1answer
83 views

Minimal setup to output 30V through GPIO

I have a bell that works with a coil and when I put 30V (or more) on the coil the bell rings once. So now I want to be able to control that bell using my Raspi. I have a USB Charger for powering my ...
0
votes
1answer
86 views

Raspberry pi as CAMAC controller

Has anyone ever tried using raspberry pi as a digital input/output card for high frequency (more than 100 MHz) digital signal? I am thinking about building a CAMAC controller, the interface to PC (I ...
0
votes
0answers
422 views

Raspberry Pi as Transmitter to bluetooth speakers

I am trying to do a project and I can't seem to find any information on how to set up the raspberry pi as the transmitter to bluetooth speakers. Is this possible? (Raspberry pi as the transmitter, NOT ...
-1
votes
1answer
215 views

LED board connected to raspberry pi

I've been searching for a little while for an LED light board for a while now that is easily compatible with the raspberry pi that I could use an arduino to my raspberry pi and then use my raspberry ...
1
vote
1answer
140 views

Raspberry PI and TV output

Today I bought my Raspberry Pi and want to build an ambilight for my TV. I know how to do this and will get it to work.. however, what I would like to know is if I can somehow get the output from my ...
1
vote
2answers
261 views

7 Segment display too dim with BCD to 7-segment latch/decoder/driver

I'm using 4 GPIO pins of my Raspberry Pi Model B 512MB Rev2.0 Board, to drive a single 7 segment LED display (1", Common Cathode, no part number on item) through a BCD to 7-segment ...
4
votes
1answer
770 views

REALLY force Raspberry Pi to send audio via HDMI

I wanted to use my Raspberry Pi with a very old video projector which was not capable of processing audio signals. So I bought an HDMI-audio-extractor (Ligawo 6518725 HDMI Extractor), as the PWM ...
1
vote
1answer
313 views

HDMI worked in another display, stopped working now on a LG!

My Raspberry Pi Model B Board works with RCA output, but do not work with HDMI, after it shows the splash screen. (curiously enough, it shows the splash screen, then a white screen with an option to ...
1
vote
2answers
281 views

Audio Output on RaspPI

I'm quite new to the DIY world but I wanna try to build a "smart clock". And I'm having trouble with making a choice on the audio output. So far, if I'm right i have 3 choice Use the on-board jack ...
1
vote
1answer
184 views

Small voltage on GPIO output

I tried using the wiringPi GPIO library just to test some basic IO, but when I tried to output HIGH on a pin (GPIO 25) the voltage only went from 0V to 0.03V, is this normal? If this is normal ...
2
votes
1answer
128 views

Can output pin withstand any reverse voltage/current?

In my application I need to drive a stepper motor and depending on the speed of stepper motor the device that generates the drive signal is selectable. Out1 is from rpi for very low speeds and Out2 is ...
0
votes
1answer
260 views

No default output device -9996: playing sound through Django

I'm facing a problem with my Raspberry Pi while playing a sound through a web page. The page is built in with Django and is quite simple: you push on a button and a sound is played (a Python script is ...
3
votes
2answers
5k views

Creating an HDMI Pass-Through Connection

I would be very interested to know if anyone on here might be able to provide some insights into the feasibility and/or proper approach to add a HDMI input to the Raspberry Pi in an effort to allow ...
1
vote
2answers
732 views

Floating values from GPIO pin

I'm controlling a stepper motor through a stepper driver that is connected to the raspberry pi. Before I run a script to move the motor, the pi's pins have a "floating" value causing the motor to ...
1
vote
1answer
6k views

Use cellphone screen as monitor

This question is different from (Connect Pi to an old laptop screen) because I will use a cellphone and not a laptop. Would the Raspberry Pi support a LCD screen that is taken out of a cellphone?
1
vote
1answer
66 views

GIPO output and output levels

I have some basic questions, sorry, I havent found this. What are output levels of GIPO (Raspberry PI) I ment this voltage ranges of low and high for input/output What is the maximum current that ...
2
votes
1answer
418 views

Text To Speech Select Output Device

I saw many tts engines, like festival, espeak, etc.. I wanted to know if any of these could select the output device, like an USB sound device. If it's possible, what the command line to make it ...
3
votes
2answers
7k views

No output on HDMI display, but it works on Video

I use my HDMI slot every time I plug my Raspberry Pi in. But I plugged it in the other day, and my monitor just said No Signal. So I plugged it in via Video, and it works. I just don't want to use ...
2
votes
2answers
799 views

Python Synth with Raspberry

I'm trying to create a synth using python with raspberry pi. I've written the code for manipulate the gpio input (i've modified the electronic of an old pianola and connected it to raspberry with the ...
1
vote
1answer
141 views

5-Bit to 32 Port Microcontrollers

Are there any 5-bit to 32 Port Chips, that would operate: Converting from 5-bit: inputs: 5 bit address 1 bit value 1 bit clock outputs: 32x 1 bit value (outputs toggled) Converting to ...
2
votes
1answer
408 views

Updating wheezy breaks Adafruit_CharLCD

So, just to try and keep the wheezy up to date I did an apt-get dist-upgrade and upgraded a couple of things, among which python. Now, when I try runing the example ./Adafruit_CharLCD.py I get no ...
3
votes
3answers
6k views

No video on HDMI?

I just got my Raspberry Pi in the mail, and went to hook it up to my TV with an HDMI cable. I plugged in the cable (known to work with my cable box), a keyboard, and then power. A light comes on the ...
3
votes
1answer
2k views

Why RCA video doesn't provide colors

When I use the HDMI with my Raspberry Pi, all is ok. But when I use RCA output on my television, the screen is black/white. I have installed OpenELEC. I already changed of PERITEL-RCA adapter, I ...
5
votes
1answer
680 views

How can I move the terminal?

For some reason my TV is cutting off about 4 or 5 characters from the screen of my Raspberry Pi. I am using Raspbian, but it occurred with Arch as well. Could it be that I have an HDMI to Component ...
10
votes
2answers
10k views

How do I attach two monitors in a dual head configuration?

I'm considering buying a Raspberry Pi or compatible solution. My problem is that I could not find how to achieve a dual head configuration. I would like to attach two 1920x1200 displays by digital ...
8
votes
1answer
457 views

HDMI output display shows zits/interference error

I received my Raspberry Pi today and tried the vanilla Debian squeeze distro and the OpenElec XBMC distro and noticed that the display was showing interference/zits similar to this: I checked my ...
7
votes
2answers
1k views

What are the pros and cons of connecting to a VGA monitor?

I can either get a passive RCA (Composite video) to VGA, an active RCA to VGA or an active HDMI to VGA, but which? What I want to know is: How does the quality compare between them (as in not ...
30
votes
7answers
91k views

Can a simple cable convert HDMI output to VGA?

One may buy a simple HDMI to VGA cable, or an HDMI to DVI cable. Example: on Amazon. However, my vague knowledge is that these cables only work for video cards that have special support for this ...
22
votes
3answers
60k views

Why is my Audio (Sound) Output not working?

I can't get the audio running. I don't hear anything and can not play anything. Is there a solution to enable audio?
23
votes
2answers
5k views

How can I use the GPIO pins as digital outputs?

I've read that the Raspberry Pi has a number of input and output pins. How can I switch them? (from Python?) What voltage logic? Do I need pull-up or pull-down resistors? Do I need to switch the ...