Raspberry Pi Stack Exchange
Raspberry Pi Stack Exchange

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1500 questions
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6 answers

Is it possible to add RAM to Raspberry Pi?

Is it possible to add RAM to a Raspberry Pi?
Dortík
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5 answers

What is a pull up resistor? What does it do? And why is it needed?

I have come across many simple circuits that show how to switch on an LED or something else. Pull up resistors are often mentioned. What do they do? Some GPIO pins require pull up resistors and others do not, what is the difference?
Matthew Rohrich
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9 answers

Getting NPM installed on Raspberry Pi (Wheezy Image)

I was lucky enough to get a Raspberry Pi under the tree this year and I've had a bit of fun playing with Node.js on the device. However, Node.js is much more interesting when you can pull down packages and plug them into your applications - and this…
Mitch Denny
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4 answers

Is there anything I can do to improve boot speed?

I love my Pi, but it takes a considerable time to boot. If I want to use it as a Media Centre, it's quite important that it powers up quickly. Are there any steps I can take to improve boot performance?
Jivings
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3 answers

Wifi - bring wlan0 up on boot

I have my network setting stored in /etc/wpa_supplicant.conf and my /etc/network/interfaces looks like this: auto lo, eth0, wlan0 iface lo inet loopback iface eth0 inet dhcp iface wlan0 inet dhcp wpa-conf /etc/wpa_supplicant.conf To connect to the…
iiSeymour
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5 answers

Powering from a non-dedicated power source

While the quick start guide says not to power the device from a USB hub or from a computer, the only requirements for power listed are: Micro USB power supply – make sure you use a good quality one, capable of providing at least 700mA at 5V When…
ramblinjan
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3 answers

Simple Keyboard Configuration

My USB keyboard was configured slightly wrong. So far I have only tried it with the Debian image. Certain keys were not in the right place (such as the '~' character). I know how to change the keyboard configuration and that this is trivial for…
ramblinjan
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3 answers

Can Raspberry Pi reliably bit bang a 9600 baud serial and is there example code?

I am wondering how feasible it is to use bitbanging to drive a 9600 baud serial via the GPIO pins on the Raspberry Pi. Obviously, Linux is not a terribly good platform for bitbanging, as there is a large number of drivers and other interrupts which…
Nakedible
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3 answers

How to get Wi-Fi to connect on boot?

Raspberry Pi Model B OS: Raspbian I am running my Pi headless (currently through a direct Ethernet connection). I have a USB WiFi dongle. I would like to have the WiFi start up at boot and connect by…
katriel
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29
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6 answers

GPIO Pinout Orientation RaspberyPi Zero W

I looked over various websites providing the pinout explanation, especially this . But I have trouble to figure them to the real rpi zero. I mean in the following image provides the pinout Information: But I cannot figure out on real rpi if the 5V…
Dimitrios Desyllas
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29
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2 answers

WiFi configuration on Arch Linux ARM

I have bought a Model A Pi, and I successfully configured it with a USB Wifi dongle on Raspbian. I recently prepared an SD card with the latest version of Arch Linux ARM and I am trying to get it set up with WiFi. I was trying to follow a Raspbian…
user151324
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29
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5 answers

Circuit to safely power-down Pi

I want to use my Pi as an XBMC server in the car. The XBMC docs say that you should always use the shutdown command before disconnecting the power. I've been thinking that it should be possible to create a simple circuit with a capacitor and…
Nicholas Albion
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29
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5 answers

Having launched X, can I shutdown without a mouse?

I've launched into X using startx, but now can't shutdown my pi, as I have no mouse, and I can't seem to access anything with the keyboard alone. What can I do?
Tom Medley
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3 answers

Where to find old Raspbian release?

I need an old Raspbian release, precisely rpi_35_v3_jessie8_kernel_4_1_12.img. On the download page raspberrypi.org I can only find the latest release. Is there any way to get the old release mentioned above?
Socrates
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29
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6 answers

Can I use PATA cables for GPIO?

Raspberry's GPIO connector looks very similar to the old Parallel-ATA connectors. I do have several spare floppy/hdd PATA ribbon cables. Can I use these cables for GPIO? I know that GPIO has 26 pins, floppy has 34, hdd has 40, but the GPIO connector…
asalamon74
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