Raspberry Pi Stack Exchange
Raspberry Pi Stack Exchange

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1500 questions
26
votes
1 answer

Is there a central resource for project ideas?

Is there a community-accepted space that people are submitting their finished projects (for example, Ben Heck's BBC Micro mod, The SNESDev-RPi, etc.)? How-tos would be nice, but not required. For enterprising hackers that are looking to borrow…
Zoot
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26
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11 answers

How can I copy the same image to many SDs?

So finally I can place that bulk order for Raspberry Pis! However, configuring them is going to be a chore. What I'd like to do is: Download a stock image, and tinker with it on a single Pi Save/extract/copy that image to all the other SD…
Tom Medley
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4 answers

How do you make the HDMI hot-pluggable on a Pi?

We have a Pi3 connected to a TV on a remote worksite. Sometimes, the remote site has a power outage, and when power is restored, the TV and Pi get power at the same time. The problem is that the TV takes a while to power up, so when the Pi starts…
John
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26
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3 answers

Is my Raspi okay sitting on a magnet?

I have a big magnetic sheet that my Raspberry Pi is sitting on. It seems fine, but are there any dangers?
EGHDK
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25
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1 answer

How do I turn on Level 2 (L2) cache?

It has been suggested to me that the L2 cache is turned off by default on the Pi, and that turning it on could improve CPU performance (probably at the expense of GPU performance). I'm keen to explore this. This is my questions: How do I check if…
Darren Wilkinson
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25
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1 answer

How can I use an external USB sound-card and set it as default?

I've got an external USB sound-card from C-Media running on my RPi3. I can play some recordings using aplay/arecord by specifying the card index and ALSA plugin. However, many other sound files does not play at all, or not as expected. Some other…
not2qubit
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25
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4 answers

How can I control Lego motors?

I'd like to find a way to make my Raspberry Pi control some Lego motors, and as a bonus I'd like to make use of one or more optical sensors. Normally, Lego robotics make use of the Mindstorms "brick" controller - this appears to be expensive and…
Salim Fadhley
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25
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7 answers

Is soil moisture sensor corrosion normal?

I have a Raspberry Pi project that has three soil moisture sensors. I take a moisture sample every minute. After about a month I started to get bad readings. On further inspection I noticed that my soil moisture sensors were corroded to the point…
Arthur Putnam
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25
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5 answers

ImportError: No module named RPi

I am trying to run a package on my Raspberry Pi: At the terminal, I typed in “sudo apt-get install picap” followed by enter. I get it installed but cannot execute "picap-setup" – instead an error message follows: pi@raspberrypi:~ $ picap-setup…
99centsdreams
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25
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4 answers

How to map Caps Lock key to something useful?

I'm used to mapping Caps Lock to Escape, particularly for use in Vim. In Ubuntu, this is simple from the GUI. In other distros, a utility like xmodmap can be used. I tried this, but it seems that xmodmap cannot be installed by apt. Can this sort of…
Eric Wilson
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25
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3 answers

Control Hardware PWM frequency

I'm using the hardware PWM output with wiringpi. It provides the function pwmSetClock that should make it possible to change the frequency. (https://projects.drogon.net/raspberry-pi/wiringpi/functions/). I believe since the default is 200 Mhz…
user1217949
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25
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2 answers

Is there any limit for micro SD card size in PI3?

I have ordered Raspberry pi3. So I want what is the maximum compatible size of mirco sd card with PI3 ?
parthivrshah
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25
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3 answers

TightVNC copy/paste between local OS and Raspberry Pi?

My TightVNC Server on Raspberry Pi seems can not handle copy/paste between its and my local clipboards. What can I do?
Ebrahim Byagowi
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25
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3 answers

Can Raspberry Pi 3 do 4K Video?

It looks like the Raspberry Pi 3 may be powerful enough to output 4K video, but I haven't seen anything about it anywhere. Does anyone know if the Raspberry Pi 3 can output video over HDMI at 4K resolution? If so, is it 30Hz or 60Hz?
Chris Pietschmann
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25
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3 answers

Can I get audio input through the GPIO

The Pi has a standard 3.5mm audio jack, but this cannot be used for audio input However, we've got a load of GPIO pins on various interfaces. Would it be possible to recieve analog audio into the Pi via the GPIO? Elinux tells me: It is also…
ACarter
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