Questions relating to the physical components that the Raspberry Pi consists of.

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Smartphone instead of Raspberry Pi… is it possible? [on hold]

I have been wondering whether it is possible to use cheap china smartphone, supplied with some peripherials for GPIO, instead of Raspberry Pi. I found this question after some googling, but no ...
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1answer
22 views

Available GPIO Pins for Transmitter

I have a touchscreen that uses the following GPIO pins on my B+: PIN NO. SYMBOL DESCRIPTION 1, 17 3.3V Power positive (3.3V power input) 2, 4 5V Power positive (5V power input) 3, 5, 7, ...
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1answer
29 views

How to measure Power Supply without Extra Hardware on B+ and RPi 2

As shown in this question, for the Raspberry Pi model B, in order to measure the voltage you just connect a multimeter to the TP1 and 2 pads. How is this done on the Raspberry Pi model B+ and 2 which ...
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26 views

Raspberry Pi does not Boot with TouchScreen

I just received my board today. I connected this touchscreen to the gpio(I am sure I connected it right because there is only one way to make it fit) and downloaded custom image file from the site for ...
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3answers
151 views

How is a Raspberry Pi different from an old phone

I've been looking into getting a Raspberry Pi, but I end up needing a case, a display, and some way to power it, and wanting some degree of portability. It seems to me that even the most outdated ...
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1answer
23 views

RasperryPi freeze after boot: can't login

I have a RasperryPi model B (512Mo RAM) and it worked well for 1 year. Several weeks ago I started having problems and I thought it could be the SD card (I sometimes halt it just unplugging the USB). ...
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0answers
35 views

RaspberryPi A+ USB Data Lines shorted

This is kinda weird problem. I used Raspberry Pi A+ for my small projects. I did all the programming using a USB WiFi dongle via SSH. It all went happy and fine until one fine day the dongle stopped ...
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1answer
79 views

Is the memory stacking order different on rPi B vs rpi 2?

This question about Package-on-Package RAM/CPU got me curious: My rPi B has the Samsung RAM packaged on top of the Broadcom (as I can read the Samsung product details off of the package). My rPi 2 B ...
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2answers
267 views

Official Resellers of Raspberry Pi Boards

Does anyone know of a list of the official resellers of the rpi board? How do you tell the board is official?
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1answer
147 views

A way to solder composite video directly to RPi B+ board?

I have a b+ newly purchased that I'm slimming down for a handheld build. Ideally, I'd like to be able to solder my composite video connection to the underside of the board like I could with a model ...
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1answer
20 views

Are RPi peripherals from version 1 compatible with RPi B?

I have some original Raspberry Pi devices that I want to use with the RPi B version. Are old Raspberry Pi Shields compatible with the new Raspberry pi? Specifically, I have an Xtrinsic MEMS Sensor ...
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1answer
64 views

RGB LED is not lighting up

I connected an RGB LED(common anode) via the GPIO, and tried to get it to light up, but for some reason when I run the command, the LED does not light up. Here's the code I'm using import RPi.GPIO ...
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42 views

Gpio state can't be changed when connected to a DC motor or led

I am using the pi4j library to control the gpios on the raspberry pi B, but I ran in the following problem: when I start a pi4j example like ControlGpioExample.java then the led(with resistor 220 ohm) ...
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2answers
52 views

How to have a Raspi trigger a Remote Control physically

I have a Remote Control for my windows shades and I would like to be able to trigger them using some software using a web interface or an android app. As I am an enthusiast programmer I would like to ...
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1answer
20 views

Stranded connector cables with raspberry pi

Is it safe to use stranded connector cables with raspberry pi? I suspect I blew my last RPi because I used the stranded connectors, don't want to get into the same situation again.
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2answers
150 views

What are the RUN pin holes on Raspberry Pi 2?

Inbetween the Display port, and the Activity LED on my Raspbery Pi 2, There are 2 holes boxed off, labled with: "Run". What are those pins? What do they do? is it a reset?
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2answers
69 views

Copy Protection, Intellectual Protection and Deployment Issues

After a time with the Raspberry Pi 2 Model B v1.1., i have the following concerns? I know it is focused to enhance vulnerable educational sectors, but it is possible to sell a product, based on the ...
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0answers
38 views

How to make a battery powered and re-programmable robot with raspberry pi? [closed]

Normally using a microcontroller what we do to make a robot: We write the code and compile it We connect the programmer to the computer and then transfer it to the microcontroller Now once we have ...
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2answers
101 views

Pi 2 Model B, display and TNC-Pi

Firstly I am new to the Raspberry world.I have purchased the following and it does not seem like they are compatible pin config and board/hole position. I noticed that the older PI had less PINs for ...
2
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1answer
124 views

Delay between bytes using py-spidev for SPI communication on Raspberry Pi

I am attempting to read/transfer data between an instrument and Raspberry pi 2, using the RPi as the Master and instrument as the slave. The data sheet states I must have a 9 ms delay between sending ...
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2answers
89 views

Resetting I2C? Or did I break my chip?

I'm connecting a TS45315 light sensor on an Adafruit breakoutboard to the I2C bus of my Raspberry. I access the data through the following simple Python script: ...
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0answers
66 views

Edimax EW-7811UN not detected by Pi, works fine on a PC

Hoping someone could help verify something for me. Up until a few days ago, my Edimax EW-7811UN was happily buzzing along. I was playing around with the GPIO pins when suddenly I noticed the blue ...
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1answer
177 views

How to wire up a DHT11 temperature sensor

I'm a Raspberry Pi (and hardware) noob and am trying to hook up a DHT11 temperature and humidity sensor. I've found two separate guides, and I'm seeking advice as to which I should follow. This UU ...
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1answer
226 views

Which raspberry pi model for playing with electronics, maybe more?

Raspberry Pi beginner here. I've been looking at these beasts for a while. I'm very comfortable with programming and command line, but want to start playing around with electronics powered by ...
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1answer
42 views

New Raspberry Pi SPI Interface Question

I was looking at the new Raspberry Pi. I wanted to know if the SPI Interface will be able to sample at a higher sampling rate. Does anyone have any information on this? According to this page, the ...
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2answers
67 views

Struggling with installation of Raspbian on sd card from a Windows 8 Machine

I am a first timer asking question here, and also a new Raspberry PI user (well, potential user). So, I bought a new raspberry PI 2 with 16 GB SD Card yesterday. The SD card was without Noobs, so I ...
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3answers
264 views

Using Wi-Fi Adapter reboots Pi

I'm using an Edimax EW-7811Un in my Raspberry Pi 2 under Raspbian. Version is Linux stickpi 3.18.7-v7+ #755 SMP PREEMPT Thu Feb 12 17:20:48 GMT 2015 armv7l (or at least that's the closest I can ...
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1answer
109 views

How to access SPI on Raspberry Pi B+

I tried searching here and other places. What is the best way to access the SPI and get the fastest speed out of it. My project involves interfacing the Pi with an ADC that is rated for 5Msps ...
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2answers
643 views

Should GPIO pins 13 and 14 be soldered together?

I just bought a new Model A+ board, and noticed that the GPIO pins 13 and 14 (board pins 21 and 23) are soldered together on the backside. This was not the case with my previous A+ board: see the two ...
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1answer
86 views

Accessing ADXL345

I'm trying to access an ADXL345 Accelerometer mounted on a Sparkfun breakoutboard via Python and I2C from a Raspberry B+. I'm following this tutorial However when trying to check for the sensor with ...
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1answer
39 views

Hire PI Developer to develop an analyitcs box based on raspberry pi

I am working on this new project to monitor signals from an STB box. I need a PI box to interface with the STB and i am looking for a PI developer? How do I hire someone?
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1answer
32 views

Can I span cable before microUSB input of Raspberry Pi without damaging it? [closed]

I have a Raspberry Pi B+ and I need to provide an external PCB with 5V|(~1A) which is controlled by RasPi. Since I assume that I cannot use GPIO pins to provide PCB with ~1A (as the current I need is ...
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1answer
757 views

LIRC / Raspberry PI 2 , No input

I want to use LIRC with my new RPI 2. To do that, I followed this tutorial. Basically it is telling me to do the following: Add this to your /etc/modules file: lirc_dev lirc_rpi gpio_in_pin=25 ...
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1answer
115 views

Piezo wiring for Raspberry Pi

I have a piezo element that I got from a song card, it looks like the one at: https://www.sparkfun.com/products/10293, and I was wondering whether it was safe to connect to my raspberry pi without a ...
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0answers
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Developing drivers for HATs: is this a good practice?

I have designed a few HATs. Now about driving it, does this sounds like a good way doing it? The architecture described below is the driver layer designed for my custom kernel, but a stripped down ...
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1answer
112 views

Using Android phone as microphone for R PI B+

I'm planning to use Jasper for voice control on my Raspberry Pi B+. However, there are no microphone sockets and I do not have a USB mic. I would like to know if there is any way I could use my ...
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2answers
120 views

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 ...
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1answer
102 views

Can you back power the RPi2B? [duplicate]

I was wondering if the Raspberry 2 Model B can be back powered. From what I see here it should be possible. But in various other places it's been said that for the B+ it isn't possible and the 2B ...
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1answer
74 views

Raspberry Pi to sync lights to audio input from PC

So I'm wondering if it's possible to make the Raspberry Pi sync lights to sound coming from my PC. I would use an usb soundcard for a sound input and a usual audio cable. Right now I'm running ...
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1answer
78 views

Downloading Pictures From iPhone 6

I use gphoto2 to download pictures from my iPhone 5 to my Raspberry Pi. Since I upgraded to an iPhone 6 I only get an error telling me that it is "unsupported" device. Are there any alternatives? I've ...
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0answers
287 views

Using Raspberry Pi with Arduino GSM/GPRS Shield

Raspberry Pi Model B GEEETECH Arduino GPRS Shield V1.0 (bought from: bit.ly/1G0KYR7) ^ Similar somewhat to: Seeed's GPRS Shield V1.0 | Link: seeedstudio.com/wiki/GPRS_Shield_V1.0 (has more ...
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1answer
79 views

Can I make a bridge between GSM Arduino shield with a Raspberry Pi?

I am trying to do some work with Raspberry Pi, however, I have GSM Arduino shield laying at home. I want to give a voice-call using it. However, I still wondering how can I interface voice/mic, ...
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0answers
33 views

web server error-403 Forbidden error

I need help with a problem, I have, BOA installed, Now, inside my /var/www, I have more folders: so my fill tree is more like: /var/www/main-site Now, what I have is, at /var/www/index.html there ...
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0answers
24 views

Isnt Raspberry PI Fully open source hardware yet? [duplicate]

Almost ALL mobile processors are ARM, but sure a design can be made with an ARM Processor which is open source. This question is different from the question asked on How is Raspberry Pi "open ...
3
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1answer
209 views

Simulate GPIO pins

I would like to do some simulation of the Raspberry's GPIO pins, e.g. for automated testing and developing the scripts on another host that is not the RPi. Are there any existing ...
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2answers
108 views

Powering several LEDs from GPIO output

I'm currently working on a "rotating cube" project where a raspberry pi will be used to determine which cube face is at the top and any given time using an accelerometer and light it up with LEDs. ...
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3answers
3k views

How to install Waveshare SpotPear 4 inch LCD in RaspberryPI 2?

I've bought 4inch IPS LCD from WaveShare but cannot get it run on newest Raspberry PI 2. The original DVD comes with image which isn't compatible with RPI 2. Tried to follow this manual but without ...
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3answers
108 views

How can I send commands from Arduino to raspberrypi

I am making my baby-steps using raspberrypi. I am stuck in something. I am building a device that combine arduinà with raspberrypi. There are some sensors connected to arduino and others to Raspa ...
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2answers
125 views

Raspberry Pi Ethernet port not working after thunderstorm

I have a Raspberry Pi (512 Mb ram) running Arch Linux ARM, connected to my router working as a vpn server. After a thunderstorm, the Ethernet port stopped working. It won't even blink anymore. The ...
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1answer
286 views

Connect an android tablet touchscreen to a pi?

I have an android tablet (versus touchtab 7v dc) that unfortunately doesn't work any more. I wanted to know if there is any way I can salvage the touch-screen from the tablet and use it as a display ...