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

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Recording audio with Rasbperry Pi 3 and TEA5767

I'm trying to make an FM radio using a TEA5767 while also trying to sample 1-2 seconds of audio through the pi and was wondering how could I go about that? I'm thinking of feeding the aux out of the ...
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14 views

CGA Output from GERT666 (or other GPIO connection)

I have a monitor which accepts 4-bit TTL CGA Only. Does anyone know if there is a way to directly output 4-bit TTL from the Raspberry Pi? I know that there exists VGA-CGA converters, but it would be ...
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30 views

I2S Recording combined with I2S Playback

I have a Raspberry Pi Zero and I am using the Adafruit I2S MEMS Microphone together with the ADAFRUIT I2S 3W CLASS D AMPLIFIER BREAKOUT - MAX98357A. I did follow the two respective tutorials and I ...
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2answers
95 views

Output sound over USB and into a computer (no 3.5mm jack)

I am trying to make a soundboard for my computer using my raspberry pi and a touchscreen. In order to mix the pi's sound out with my mic, I need it as a separate input to my computer (my mic uses the ...
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34 views

Drive a 73 inch monitor

Can the HDMI output of Pi3B+ drive a 73 inch DLP TV (that accepts HDMI input) as a monitor? I feel silly asking, but if anyone will know it's this group
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23 views

Pi Music box stream to DNLA device

I downloaded Pi music box and I've got it setup and running (which is all good) so now I can use my phone/pc to connect to the Raspberry pi. But, now i want to connect the raspberry pi to my DNLA/...
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1answer
32 views

Output current of 1 Pin (New Model)

Quick question. I have the latest Raspberry Pi (Model 3B+) and I just want to know if the output current of the 3.3 V supply has changed as I'm using a T-cobbler at the minute.
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1answer
56 views

Speeding up updating of GPIO pins

I have a program where each step, two GPIO pins have their duty cycle updated (I'm using pigpio). I'm running the program for millions of steps (think 50 to 100 million) and running the PWM outputs ...
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1answer
36 views

Switch audio output not working

I'm using Raspbian Stretch Desktop for my Raspberry Pi 3B. I'm using a VGA screen with an HDMI to VGA adapter, so I want the jack to work as my main audio output. If I unplug the HDMI and reboot, the ...
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57 views

GPIO input pins give out a volte

Hi I am controlling a 1960's Lego train trough a motor controller that uses the PWM of the Raspberry pi3 and I have 4 IR sensors that are externally powered with a 3.3V constant power supply, I used ...
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1answer
46 views

How to turn off pin 23 correctly? SSH connection crashed

so I am a newbie to the raspberry pi and as the title says, I was connected to my rpi trought SSH protocol and the session suddently was terminated due to a 'FlowSocketReader' error or something. My ...
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47 views

Turn on Raspberry Pi 3b monochrome display output

As the title said, I want to switch the Raspberry Pi 3 model b to a monochrome display output.
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1answer
180 views

Can I connect 3V3 to GPIO output pin?

Let's say I configured GPIO 2 as an output pin to control a 5 V solid state relay. When I set GPIO 2 to HIGH (True/ON) the relay will turn off and when I set GPIO 2 to LOW (False/OFF) the relay will ...
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22 views

How can my startup script put messages that appear during the boot screen and in dmesg? [closed]

I need to see exactly when my script starts, and how long it takes for various components to execute. I tried logger but it doesn't work for this purpose.
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2answers
100 views

Getting Pure data to work on Raspbian Jessie (giving pure data permission to access device?)

I’m new to raspberry pi and am trying to run Pure data on it to control a teensy 3.2 using Open Sound Control which in turn controls some stepper motors for a pump just like here https://github.com/...
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0answers
263 views

All Outputs True when checking Input pins

The RPi setup has input Pins 20 and 21. The program is checking if the inputs are high or low constantly. If so the assigned outputs switch to high. The unexpected result is that when e.g. Pin 20 is ...
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2answers
50 views

Basic questions about inputs/outputs on a breadboard (Pi 3)

I have started my first basic project today and I have a few questions I couldn't find answers to yet or I just don't know how to search for any. Sorry if those questions seem a bit stupid, but I will ...
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2answers
58 views

How can I drive output voltage between 0v, +12v and -12v on a single line?

I have an appliance that needs a +12v pulse to be activated and a -12v pulse to be deactivated on the same input pin. After the pulse, the line should drop to 0v again. This voltage switching only has ...
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2answers
534 views

Using ffmpeg to capture whatever is being globally sent to video output (ie: hdmi output)

I have setup a RTSP monitor with a Raspberry Pi 3, using this tutorial: https://community.ubnt.com/t5/UniFi-Video/Tutorial-RTSP-Raspberry-Pi-B-Viewer-6-Cam-4-Cam/td-p/1536448 TLDR: it uses the ...
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2answers
100 views

BCM 12 broken on RPI 3?

I'm having trouble using one of the GPIO pins. When trying to use BCM 12 (PIN 32 in BOARD mode, name: GPIO26) as an output, I get the warning: RuntimeWarning: This channel is already in use, ...
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1answer
252 views

Can I make a GPIO into a 3v output?

I am working on setting up a Pi3 and have a screen attached its currently taking up all the 3.3V outputs. Is it possible for me to change the settings on say GPIO 16 (pin 36) to become a 3.3V output?
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340 views

Raspberry Pi Zero W Mini-HDMI to VGA connection problem

The SD card I ordered a week ago showed up at my house today so I threw Raspbian on it with Win32DiskManager and attempted to boot up, but I was greeted without any kind of video signal. After doing a ...
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3answers
553 views

Which type of GPIO has the raspberry pi?

Which type of output has the Raspberry pi 3 model B: sinking or sourcing? I want to connect SSR (Omron G3MB-202P) to Raspberry GPIO. This SSR has one NO contact (NO means "normally opened", i.e. it ...
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99 views

Output a fake TV Channel?

I recently went on a Disney cruise with my family and the TV had different channels that had films on a loop different channels were different categories. My wife and I REALLY liked this and wanted ...
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303 views

audio via Jack only with omxplayer

Strange things happen to my Pi. I have a headphone connected to the audio output (3.5jack). I have added the snd_bcm2835 modules and when I start a track on the omxplayer via ssh, music comes in top ...
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208 views

bash gpio set 0 for output low state

I've made a fresh install on my RPi 2 B+ with Minibian and wiringPi. Everything is right without the number I have to set to change the output state. When I do : echo 0 > /sys/class/gpio/gpio4/...
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209 views

Raspberry Pi 16X2 LCD wrong output

I want to display some text on my 16x2 LCD display with my Raspberry Pi 3 with Windows IoT, but the output is completly unreadable. My wiring should be good so I don't know what is the problem. I ...
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1answer
3k views

How to set a GPIO pin to default HIGH before setting it to output?

I have a raspberry pi connected to a Sainsmart 4-channel relay, where each relay is activated by a LOW signal. When I set a GPIO pin to output, it defaults to LOW, which of course activates the ...
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0answers
49 views

Produce control voltage from GPIO based on wave file source [duplicate]

Is it possible to produce Control Voltage from a wave file (.wav) through a GPIO pin? Would it then be possible to produce multiple streams of control voltages, from a set of wave files through ...
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2answers
748 views

Bad quality with USB sound card

I am trying to get audio input and output with an USB sound card (tested on Windows, works perfectly fine). With help from the Internet, I can record and listen sounds with the card but the quality is ...
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1answer
775 views

Assigning MPD audio output to jack and other applications to HDMI

Is there a solution to set the MPD audio output to local/jack and other applications audio output to HDMI? I have a Raspberry Pi 3, Raspbian with Retropie and I want to set Retropie audio output to ...
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130 views

Configuring a separate audio input and output devices on RPi 2 Jessie

I'm using a Raspberry Pi 2 running Jessie as a device that takes basic audio input, processes it, and produces an audio output. The speaker is plugged into the headphone jack. I want to assign the ...
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1answer
29 views

What do I need exactly

I have a raspberry pi, but is there a list somewhere of all the other input/output items I need, such as a mouse etc? And can you specify if they need to be wired or not? Thanks.
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1answer
142 views

Gpio response is delayed

I'm using 8 of the GPIO to trigger relays for a Christmas light controller I am building. Everything works, and the GPIO output correctly, but 1 of the 7 GPIO pins output is delayed. Specifically it ...
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2answers
1k views

raspbian-output-video-camera-to-3-5-lcd

I have a pi3, pi camera and kookye 3.5"lCD. On power up the OS is displayed on the 3.5 screen and the touchscreen works fine. When I run the camera it doesn't out put to the 3.5lcd. Likewise when I ...
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101 views

5V relay with Raspberry pi 3 Model B [duplicate]

I am working on home Automation Project (Voice Recognition to light On/Off) and yes i'm new to raspberry pi I have: [ http://www.amazon.in/Raspberry-Pi-64-bit-quad-core-Cortex/dp/B01CCOXV34?ie=...
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2answers
109 views

Lost console log after running any app that takes over the screen (but not on SSH)

I am experiencing a very annoying issue and I don't know where to look for the reason. I would really appreciate some advice. I am using Raspbian Wheezy without GUI. I work mainly through SSH and it ...
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1answer
1k views

Why do I get an error message: 'Inappropriate ioctl for device' with I2C connection?

I am trying to connect a particle sensor to RPi via I2C. I have added dtparam=i2c_arm=on to the config.txt file and I have also un-blacklisted I2C. Using the Serial Python module, I have a script ...
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1answer
177 views

No output of commands on SSH console since Jessie was installed [closed]

when I for example execute the command poweroff, there is no output of the command visible. This happens with systemctl restart apache2 as well. I assume that system ouput is forwarded to somewhere. ...
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2answers
540 views

Use PHP to get callback from GPIO in

Is there a way to use PHP instead of python to detect callback from a GPIO pin? I see you can use shell_exec to execute a pin but not read output in real-time. An example is using a vibration sensor ...
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3answers
7k views

Composite video out not working

I just got a new Raspberry Pi 3 with wifi. It works fine using the HDMI output, but I need to use it for a composite video project on an old PAL tv. Just plugging it in with a composite video cable ...
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1answer
100 views

GPIO output working, but not?

Sorry for the confusing title, but here's my problem: I'm trying to test out a 2N2222 transistor as a switch for a higher current (for a 4WD motor) with the Raspberry Pi B+, and I'm trying to use one ...
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3answers
1k views

GPIO status after python code is closed

I intend to write a python script to change the status of GPIO pins. The code will receive arguments through sys.argv, change the state of some GPIO pins, and close afterward. My question is: Do the ...
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2answers
1k views

No video output on Raspberry Pi Zero, LED flashing

So I just got a Raspberry Pi Zero and an SD card with NOOBS pre-installed. I placed the SD card onto the RPi as well as a keyboard and a power supply. I plugged the RPi onto two different monitors, ...
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2answers
167 views

Using two Raspberry Pi to display an output on the monitor wirelessly

So I have a thesis where I made a podium that has a monitor attached to it with keyboard, router and speakers plus one of my Raspberry Pi. What I want is to project my first Raspberry Pi, that is ...
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1answer
1k views

Video output not centered on TV screen

I've had a few issues with HDMI. The first was no audio which I fixed. I suspect this other issue can be fixed in a similar fashion, but I am a super NOOB to all of this. Basically, the image on ...
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1answer
455 views

How to configure touchscreen for taking input and displaying output

I am making a control system project for factories where the motors and other appliances are supposed to be controlled via touchscreen. Is there a separate software in which the screen buttons has to ...
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1answer
1k views

wiringpi2 digitalWrite() has no effect

Hello fellow rpi lovers :-) I've encountered a very strange problem in my rpi-based project: I'm trying to control just one pin in OUTPUT mode so I use more or less such code: import wiringpi2 ...
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55 views

Input / output errors with Samba

This has been asked before, and on other sites, but I'm not sure there has ever been a definitive answer. I'm running Samba under Raspbian on RPi model B (original version -- not the recent upgrade). ...
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1answer
395 views

WiringPi - GPIO Output Vs PWM

So in the GPIO utility from WiringPi there is a command to change the mode of the GPIO pins. There is input mode, output mode and PWM mode. What is the difference between output mode and PWM mode? Is ...