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1500 questions
32
votes
11 answers
What are the possible OUIs for the Ethernet MAC address?
I'm setting up a computer lab in which many Raspberry Pis are going to acquire IP addresses via DHCP. I'd like to have the DHCP server to differentiate between Raspberry Pis and other clients.
What are the organizationally unique identifiers (OUIs)…
200_success
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32
votes
4 answers
How free is Raspberry Pi?
Is it legal to freely manufacture, distribute and modify Raspberry Pi?
Does Raspberry Pi have a license?
Are the hardware documentations and specs available to the public?
Are there any restrictions on the usage?
Adam Matan
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32
votes
3 answers
How to disable wifi in Raspberry Pi 4
How to disable WiFi in Raspberry Pi4, possibly keeping the chip powered off.
jb.
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31
votes
1 answer
How can I detect that I'm compiling for Raspberry Pi?
As Raspberry Pi needs a bit of special code (I'm talking about C/C++) for accessing some hardware features (e.g. a call to bcm_host_init()). I'm looking for a reliable and elegant way to detect this automatically. I don't think there are any…
Tapio
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31
votes
2 answers
How does memory-mapped I/O addressing work?
How does memory-mapped I/O addressing work?
I'm trying to understand a sample supplied I2S: Anyone got it running?.
Configuring Clocks:
#define BCM2708_PERI_BASE 0x20000000
#define CLOCK_BASE (BCM2708_PERI_BASE + 0x101000) /*…
Dog Ears
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31
votes
11 answers
Copy existing Raspbian installation to smaller SD card
Is it possible to copy an existing and configured Raspbian installation to a smaller SD card?
When I first installed Raspbian I only had a 32 GB card at hand which obviously is bigger than needed.
mwld
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31
votes
5 answers
How do I create a new user?
Are there any security implications for creating (or not creating) a new user?
If need be, how do I create a new user or change the default user?
Andrew Fogg
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31
votes
5 answers
Why do the Pi GPIO pins use/give 3.3V and not 5V?
I know for a long time that people should NOT put more than 3.3V on the GPIO pins. They also give out 3.3V when high.
I did some research and it seems no one really bothered asking. Almost all of them talk about the maximum current.
If I am…
Aloha
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31
votes
3 answers
Raspberry Pi 3 audio input?
Did Raspberry Pi 3 add audio input? I'm new to RPi and interested in doing speech recognition but noticed input has been missing for previous versions.
If it hasn't, what is the best way for me to go about recognizing speech on RPi3? Thank you.
corysimmons
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31
votes
3 answers
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 pins from inputs to outputs?
Which pins are…
Alex L
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31
votes
14 answers
More powerful alternative to Raspberry Pi?
I already own a Raspberry Pi model B, and I am looking for a more powerful alternative. I want it to be able to run as a server (email, file, and web) and also as a media center. I know Raspberry Pi can do these things too, but I want something…
Christos Baziotis
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- 4
30
votes
6 answers
Choosing a Pi4 power supply
I'm trying to decide what is the best option for powering a Pi4. The specs mention for a minimum of 3A. Let's consider we would also like to connect a 2.5" drive to the Pi4. Could someone more experienced with power supplies help me with the…
m000
- 483
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30
votes
2 answers
Can I use a USB webcam?
Is it possible to use a standard USB webcam with the RPi, or is there a specific peripheral that should be used?
I would like to use RPi's to stream images from webcams to the net.
darryn.ten
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30
votes
5 answers
Is my Raspberry Pi permanently damaging SD cards?
My Raspberry Pi was running fine for two months. Then some files in /usr/bin got corrupted and there were many errors on reboot.
I tried to write a fresh image but dd would block and do nothing.
sudo dd if=~/2013-02-09-wheezy-raspbian.img…
Thomas Rynne
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- 4
30
votes
9 answers
How do I disable Restore pages? Chromium didn't shut down correctly. Prompt?
I am automating a RPi for four displays at my company. I have them rebooting every day so the browser will refresh. I can't get the Restore pages? Chromium didn't shut down correctly bubble to not come up. I've tried several solutions that ive found…
Paul Karvetski
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