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

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Looking for a reference sheet for both Raspberry Pi and electronics for a study gruop

I'm planning to start a robotics study group for children or adults new to both electronics, robotics and programming. I've collected some reference sheets for programming, but I can't find any good ...
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0answers
41 views

Bare metal programming for Raspberry Pi

I am currently programming raspberry pi. I wanted to get clear out some doubts, please can anybody help. Here is the code snippet. #define GPIO_BASE 0x20200000UL gpio = (unsigned ...
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1answer
43 views

How to have the raspberry pi recieve text messages?

I have a raspberry pi and it can send texts, but how can I get it to receive text messages (SMS)? Thanks
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0answers
11 views

RetroPie missing 'emulator' folder

I've installed RetroPie and I've tried update it to its latest version (I think). RetroPie runs fine and games load perfectly but the problem I'm having is getting a USB controller to work. I've ...
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0answers
28 views

Beginning with servos and PWM

As a way into getting myself back into learning more about electronics I'm trying to figure out how not to screw up configuring an Adafruit 16-Channel 12-bit PWM/Servo Driver with my pi. It's been ...
3
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1answer
130 views

Can Raspberry Pi B+ use a card (with Debian) configured/used with “old” Raspberry Pi B?

So, I've several SDs bearing several OSes (Debian, Occidentalis, Raspbmc) for my several Pi Bs and my question is two-fold: can I (safely) boot B+ Pi from those cards w/o a risk they will be ...
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1answer
48 views

model B wrong amount of ram displayed

I have model B with 512 MB of RAM, but htop displays 92/231MB free -h pi@raspberrypi ~ $ free -h total used free shared buffers cached Mem: 231M ...
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1answer
26 views

Scanning, OCR and adding the scanned numbers using a Raspberry PI

I asked this question on Superuser and was unsuccessful in getting enough attention (even with a bounty on it). So I'm here. System setup: The intended system will be a Raspberry PI connected to a ...
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1answer
24 views

Defining PWM ports to be used on the GPIO

Now as i have noted in previous questions i understand the PWM area of the raspberry pi is the most saturated area, but my question lies in which ports can actually be allocated as a PWM output due to ...
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5answers
77 views

Can I Use this Relay Board with pi?

Can I use this Relay Board with the Pi ? Because This board doesn't have Opto-Coupler..can i drive it from 3.3v...will It Cause any Issue for Pi
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17 views

Raspberry Pi case/power supply/wall socket accessory [duplicate]

I need to plug my pi into a wall outlet and leave it there. I have yet to find any sort of case that includes all these things (case and micro-usb to power supply). Has anyone seen or made anything ...
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3answers
86 views

Raspberry pi case with power supply

I need my raspberry pi to be able to plug into a wall directly and use the wall outlet as the power supply. I've done a bunch of googling and can't find anything like what I need. Has anyone seen any ...
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2answers
72 views

Raspberry PI will not boot unless I apply pressure to SD card

I have several Raspberry Pis that need extra pressure on the SD card in order to boot up. I have a temporary fix that involves scraps of envelope flaps glued onto the card but they become unstuck over ...
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1answer
60 views

What size screws does the Raspberry Pi board use?

On the model B+ there are four screws that can be used to attach your device either to a base or firmly inside of a case or other enclosure. What is the size of these screws? That is, if you are ...
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1answer
102 views

Using other camera modules to build custom webcams

I have three old iPhones (iPhone 3GS, iPhone 3G and an iPhone 4) that I recovered from family members that were going to throw away. I had the 3GS so out of curiosity I disassembled it and recovered a ...
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3answers
272 views

Does the Raspberry Pi need a cooling system?

Searching on Newegg for "raspberry pi", the results included many heatsinks and as well as a few other types of cooling systems, yet these items do not seem to appear when looking through the stores ...
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1answer
97 views

How do I choose an SD card for the Raspberry Pi?

When looking to purchase an SD card for a Raspberry Pi, what sort of considerations need to be taken into account? Are there certain cards that won't work with the system, or should all standard SD ...
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2answers
94 views

Reducing 24V to 5V for RPi PSU

I'm trying to power several devices off of a breadboard. For simplicity I want to power these all from the same PSU. The highest voltage amongst the devices is 24V. I was looking to use a 24V 2A ...
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1answer
61 views

Quadrocopter Motor Movement

A friend and I are trying to build a raspberry pi-powered quadrocopter. We've ordered four ESCs, four motors, and the Pi, but we're having trouble getting a motor to actually move. The motor makes a ...
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1answer
30 views

raspberry Pi and robots in one toolkit

Is there a toolkit that has a simple robot augmented with Raspberry Pi? The robot should have sensors that estimate robot's pose. I'm looking for simple robots. I've done some simulations in OpenGL ...
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2answers
110 views

Kit for beginners

I discovered the raspberry pi recently from an article and I have read quite a lot about it even went through some tutorials. I want to order a raspberry pi board. I would like to enquire about other ...
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1answer
26 views

Raspbian/OctoPi File Recover

I dropped my Pi on the SD Card slot. It broke and now I want to recover my files off of my SD Card, but I only see a boot partition with no relevant files inside. I was using OctoPi (3D Printing ...
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1answer
80 views

Banana Pi memory bus clock speed [closed]

I hope this is not too off-topic but I think you are the people that may most likely got their hand on a Banana Pi board and can answer my question. What is the memory clock speed of the DDR3 RAM ...
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2answers
217 views

RF24 communication with Arduino

I have been trying for ages to work this problem out and can't figure it out. I have two nrf24 transceivers, one connected to the raspberry pi and the other connected to an Arduino. My code for the ...
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2answers
189 views

Is piglow compatible with model B+

So, can I use PiGlow with Raspberry Pi B+ And, if yes, does it fit inside a pibow enclosure.
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0answers
15 views

What exactly is a DataFlash Board (AT34DBXX) and what use is just 4MB?

Along with my DVK511 board (which I am loving), one of the boards that came with it is a SPI interfaced AT45DBXX DataFlash Board (DataFlash Board ) it came with some sample source code, and via ...
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2answers
475 views

What hardware do I need to turn Raspberry Pi into a TV remote controller?

I would like to control my TV using a Raspberry Pi. I would like my Raspberry Pi to act like a TV remote controller. What kind of hardware do I need to make it? Do I need something like IR emitter, ...
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2answers
6k views

What's the difference between the Model B and B+?

I have a Model B Raspberry Pi, but what are the differences between this and the new Model B+? Also apart from the physical differences, what could I do with a B+ that I can't do with my Model B?
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2answers
50 views

'Safe' temperatures for use

So I need to measure the temperature in my conservatory, and with all the doors shut on a summer's day it gets pretty toasty (uncomfortable for more than a few seconds). My question is what sort of ...
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1answer
37 views

Touchpad the works well with Raspbian

I'm looking for a USB track/touch/mouse-pad that is compatible and known to work well with with the Raspberry Pi running latest Raspbian image. Just the pad, no keyboard attached. Any ...
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1answer
52 views

Can I use TI Launchpad's JTAG debugger to debug Raspberry Pi over JTAG?

This tutorial describes settting up Rapsberry Pi for debugging over ARM JTAG. TI LaunchPad board also contains some JTAG things to program MSP430. It has only two wires, unlike eight in the ...
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1answer
117 views

Using the Raspberry Pi with a Touchscreen Monitor

I want to buy a big touchscreen monitor for my Raspberry Pi. I'm using Debian Wheezy. I did some research and found the Iiyama T2236MSC-B1. But i dont know if it will work with my Raspberry Pi. I ...
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1answer
97 views

Connect an LCD with Ribbon Cable to Breadboard

I've purchased these two display modules, however, I am lacking the right connectors so that I can connect to my breadboard and to Pi. I would like to know what hardware I should purchase for this ...
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0answers
219 views

Raspberry Pi SIM card, tethering and internet possibilities on the run

An idea just came to me, which I am not sure if any of you has done it. And if so, hopefully someone could share with me how I could achieve this. I was wondering if I could set up a Raspberry Pi ...
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0answers
82 views

Stepper motor troubles

I've been trying to setup my stepper motor with my RPI according to this guide: http://www.raspberrypi-spy.co.uk/2012/07/stepper-motor-control-in-python/ However, nothing seems to be happening, have ...
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1answer
93 views

What is the life expectancy or which component is expected to fail first? [closed]

This is a theoretical question regarding quality of modern hardware. I got a RPi but I'm not really worried about it breaking but the concept of having all components of a PC on a single board made me ...
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2answers
62 views

The 'ACT' LED is not blinking and the CPU is overheating.

So i was working on a project in which I had to use an ADC. I used WiringPi's Python modules to do so. For testing the ADC, I attached a 100k pot to its input pin, supplied it about 20V but used the ...
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0answers
224 views

Wiring up a ILI9341 TFT Screen + Touch

I've bought a ILI9341 TFT LCD Screen + Touch to my Raspberry pi. The screen is the MI0283QT-9A "TFT PROTO", from Mikroeletronika. Here is the link to the producer's page. It has an ILI9341 chipset, ...
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2answers
103 views

Suddenly got an I/O error from my external HDD

I have used my Raspberry Pi as a torrent-server for quite a while now. My Western Digital "My Passport-Ultra" external HDD and Transmission running on RPi has worked flawlessly for more than a year. ...
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0answers
26 views

AC quantity from analog sensor

My project includes giving analog inputs to Rpi through ADC. The dc value will be simply the average of the samples but how can I calculate the ac quantity by using those sample values?? Sensor is ...
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1answer
61 views

Temperature Effects

I understand the min temperature specification for a Pi is 0°C, but could I run it outside over a British winter, which has reached 15°C below, without damaging it? Would this temperature cause ...
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1answer
154 views

Controlling Buzzer Module - No sound

The wiring seemed pretty trivial as did the required code. I have the following buzzer module: ...
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2answers
268 views

Raspberry Pi and Arduino communicate over RF?

I would like to have (10+) Arduinos read from their own temperature sensors - fine, I've done that. Now, I would like to have the Arduinos (transmitter) send the temperature sensor data over RF to a ...
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0answers
86 views

Setting up wifi with wpa_supplicant error

I purchased a TP-LINK TL-WN725N usb adaptor to connect to wifi, as I don't have an ethernet cable long enough to reach my router (on a different floor). I've installed the drivers for my kernel ...
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0answers
60 views

RPi no link light no networking

Just received my Raspberry Pi and the network isn't working, it's as if the network port is completely dead. I have checked the X1 chip as others have suggested elsewhere but that hasn't made a ...
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0answers
106 views

My Pi getting heated for no reason. How do I debug?

I wrote the Wheezy image, booted with rPi, expanded size, rebooted. Then I played couple of games, Python Games. Then I opened the default browser, however it was slow. I only opened two pages, one ...
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1answer
122 views

Raspberry Pi expansion board for measuring and data logging wishlist [closed]

Im working on new version of my Raspberry Pi expansion board. My previous board (actually it was a prototype) was designed to measure and log voltage, current, power and light intensity for whole ...
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3answers
257 views

Detect if iphone/Android nearby?

I'm working remotely and it would be handy to know when someone has gone out for a meeting / lunch in my office. I thought I might be able to passively detect what phones near the raspberry pi (and ...
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2answers
187 views

Logic converter for relay module or extra resistors and transistors?

I would like to use a 8 channel relay of SainSmart for house automation: http://www.sainsmart.com/8-channel-dc-5v-relay-module-for-arduino-pic-arm-dsp-avr-msp430-ttl-logic.html This Relay module ...
2
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1answer
58 views

Heat buildup in Rasperry pi Cases

I'm looking to build a nice wood case for my Pi. However, I've noticed that the processor already generates a good deal of heat. Would putting my Pi in a case cause noticeably higher temperatures? ...