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Questions tagged [output]

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

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1answer
61 views

No display output if I start raspberry pi and then start the monitor

If I switch on monitor first then switch on raspberry pi, it works fine. But if I switch on raspberry pi and then monitor or switch on both pi and monitor simultaneously no display is shown on monitor....
2
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1answer
22 views

Can I input/output an 8 bit parallel byte on eight pins simultaneously with Java?

Want to output 8 bits of parallel digital info on 8 pins of a 3B+ simultaneously. Input also. Java.
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0answers
31 views

Audio Output for RPi 3 Mobel+

Very simple question. If I do this: Navigate to your screen. Select "Manage Screen". Select "Advanced". Set "Audio Output" to "3.5mm jack". Press "Save". Would I be able to listen to music via USB ...
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1answer
44 views

Usb sound device to 3.5mm output real time

I have a raspberry with a usb mic. I want to stream realtime the mic input to the 3.5mm output. Is this possible?
2
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0answers
243 views

How can I get my new Raspberry Pi 4B to output 1080i video

I finally got into the Pi world with a model 4B. I've updated it to Raspian/Buster and have the network working (wireless and wired - but just using wireless right now). I'm running it using VNC-...
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2answers
32 views

do RPi3 3.3/5V pins output constant voltage even if the RPi power supply is changing voltage?

I want to power my RPi with a lithium ion battery. The RPi will be powering some devices which require constant voltage to power them. If I use a battery as supply for the RPi (which changes as it ...
2
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1answer
128 views

see output from c++ program which was started by rc.local

is there a possibility to see output (f.e. std cout << ...) from my program which was started from rc.local script when i am logged into my Rpi via SSH?
3
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0answers
2k views

Can't set output to 4k 60hz on Pi 4

What I've tried: Setting "4Kp60 HDMI" I did this in the GUI config application and rebooted. Also tried disabling it and then enabling it in the config.txt and rebooted. Installing updates My ...
1
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1answer
119 views

128x64 OLED Display Issue [closed]

I have a cheap display I got from eBay connected to a Raspberry Pi B+. It has 4 pins (vcc, gnd, scl, sda). I followed the adafruit tutorial here but after setup, when I run a python example (any of ...
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0answers
22 views

Raspberry pi 3 LED vertical panel display problem

Is it possible to change the resolution of my raspberry pi 3 to 224x756?? I have a vertical LED panel (224 x 756) and the display of my rpi don't fit the screen. My interface for my panel is HDMI. ...
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0answers
25 views

Screen Resolution for raspberry pi 3 LED Screens

Is it possible to change the resolution of my raspberry pi 3 to 224x756?? I have a vertical LED panel (224 x 756) and the display of my rpi don't fit the screen. Help thanks!
1
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1answer
103 views

Can I connect two Raspberry Pis to one 5" Display via an HDMI switch?

I have two Raspberry Pis running very different systems. I want to build an enclosure so that I can use a single 5" display (Amazon link) for both Pis. The setup I'm envisioning would rely on an ...
0
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1answer
61 views

GPIO ports not working

Friends, I try to switch 4 GPIO pins (GPIO.BCM) from '0' to '1', and only the first 2 out of 4 (GPIO18 and GPIO23)do switch, from 0 to 1. I have used different GPIO pins for GPIO24 and GPIO25, ...
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2answers
57 views

Use Pi 3 B as external memory

I have a 3D Printer that I monitor with my Raspberry Pi, but I would like to connect the pi via USB to the printer so I can also use it as external storage for the printer as well. Is there a way I ...
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0answers
28 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 ...
1
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1answer
3k 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 ...
1
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2answers
480 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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0answers
46 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/...
0
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1answer
61 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.
0
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1answer
199 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 ...
0
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1answer
338 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 ...
0
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0answers
84 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 ...
0
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1answer
244 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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1answer
147 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
380 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 ...
1
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0answers
25 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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0answers
523 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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3answers
84 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
139 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
1k 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 ...
0
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2answers
178 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, ...
2
votes
1answer
670 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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0answers
479 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 ...
2
votes
3answers
972 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 ...
2
votes
0answers
131 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 ...
1
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0answers
376 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 ...
1
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0answers
281 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 ...
2
votes
1answer
5k 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 ...
1
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0answers
53 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 ...
0
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2answers
1k 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 ...
0
votes
1answer
1k 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 ...
1
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0answers
151 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 ...
1
vote
1answer
31 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.
2
votes
1answer
192 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 ...
2
votes
2answers
2k 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 ...
1
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0answers
108 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=...
1
vote
2answers
233 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 ...
0
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1answer
2k 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 ...
0
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1answer
199 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. ...
0
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2answers
676 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 ...