Questions tagged [output]
Output refers to any PHYSICAL output from the Raspberry Pi. There are four main outputs: GPIO, HDMI, RCA and Audio.
127 questions
2 votes
1 answer
120 views
Running a 42 LED Segment display with 7 pins
I have found a little LED Segment display from a small bluetooth speaker. There are 42 LEDs on the display, including a battery light, FM light and a few other random lights. The display has 7 pins. I ...
- 123
0 votes
0 answers
145 views
How do I pipe the video stream of a Raspberry Pi Camera Module to the HDMI port or composite video output
I am using a Raspberry Pi 5. I want to send the camera stream directly to one of the HDMI ports or to the composite video output (preferable). My goal is to display only the camera stream on the ...
- 101
-1 votes
2 answers
402 views
Can I sink the 5V+ pin into a GPIO in open drain mode? [closed]
I just discovered 'open drain' mode in the libgpiod documentation and was wondering if a raspberry pi open drain pin can sink the current / handle the voltage from its own 5V pin via a pullup resistor,...
- 101
-1 votes
1 answer
304 views
Disabling RPI media output
when I connecting to my RPI via bluetooth it detect it like headphones and think that it have media output. I want to disable it . here you can see that it appears in the media output of the phone. ...
-1 votes
1 answer
139 views
Connect Raspberry Pi 4 GPIO output pins to Arduino Uno
I want my Raspberry Pi4 to give 4 unique outputs, not necessarily at the same time, which will be four different inputs to the Arduino Uno. I want to know how to proceed as I think by connecting them ...
0 votes
0 answers
89 views
connecting raspberry pi 4 to external screen or control without changing any settings (broken touchscreen)
I'm using a Raspberry Pi 4 connected to the original touchscreen. A few days ago, the display stopped working. The system controlled by the pi seems to still be working, so the fault seems to lie in ...
- 1
2 votes
1 answer
213 views
GPIO only outputs 1.8V when using Bluedot
I have setup a basic circuit to control a relay using a Raspberry Pi 4B. I have tried controlling it with both a push button and the Bluedot app. When implementing with the push button, the GPIO pins ...
1 vote
0 answers
390 views
How to config default input/output devices in ALSA config file(~/.asoundrc)?
I am trying to configure microphone and speaker for raspberry pi 4. I edited "~/.asoundrc" file like that: pcm.!default { type asym playback.pcm "plughw:0" capture.pcm &...
- 9
0 votes
0 answers
161 views
High speed TTL pulse generation
I'd like to take ~400 MB binary file, where 0's indicate low and 1's indicate high, and stream this out the rPi I/O with 20 ns time base. So something like 0000101001 Would yield Low Low Low Low Hi ...
- 101
-2 votes
1 answer
222 views
GPIO pin not providing as much current as 3.3V pin
I have an infrared led which works at 3.3V. This is the led . Edit: I couldn't find any specific documentation, it's one of those led you usually attach to rpi infrared cameras. If I attach it ...
- 1
0 votes
1 answer
71 views
Can a Raspberry Pi send a binary 1/0 to a VAV controller and which board is best for this?
My senior project is to take in webcam footage, determine the number of people in the room, and if there is more than 0 people in the room send an "on" signal to a VAV controller. I'm ...
- 103
0 votes
1 answer
112 views
try to set GPIO.output(x, LOW) but connected LED still lights
I try to make a LED light up with the code import RPi.GPIO as GPIO import time GPIO.setmode(GPIO.BOARD) GPIO.setup(16, GPIO.IN, pull_up_down=GPIO.PUD_DOWN) ...
1 vote
1 answer
582 views
How to automatically switch between the official 7" DPI display and a HDMI TV on Raspberry Pi 3?
I use a RPi3 with the Recalbox OS for some retrogaming. And I want to use the official 7" DPI monitor when it's portable, and the HDMI when I connect it to the TV. I tried plugging the HDMI cable ...
- 11
0 votes
1 answer
539 views
Reading current PWM output configuration
I use gpio #32 (wPi #26) as PWM output to control the speed of a fan based on temperature. The job starts at system startup with a dedicated account. I would like to display the current value that is ...
- 41
0 votes
0 answers
91 views
Pi keeps changing source
I have a problem with my Pi. Every time I turn on the TV it automatically changes the source to my Pi. I tried following this thread : stopping RaspPi / raspbmc from auto changing source on tv ...
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