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

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0
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1answer
18 views

Why raspberry has 5V output rail if gpio only works with 3.3V?

I have recently read that using Raspberry GPIO with 5V is risky as it may damage the GPIO pins. I did used my Raspberry with 5V without knowing this fact and I was lucky that sensors I have used were ...
0
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0answers
20 views

What component do I need to play a sound clip over GPIO?

I'm looking for a way to play a sound clip (wav/mp3/ogg) using the GPIO and some small component(s) (i.e. not ordinary speakers). The sound clips contain human speech, so quality need not be great. ...
5
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2answers
45 views

How do I detect the type of camera installed?

I need to know how to remotely detect whether an 8mp or a 5mp camera module is connected to the rpi for implementation in an embedded project. Any help?
12
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5answers
3k views

Is it possible to add RAM to Raspberry Pi?

Is it possible to add RAM to a Raspberry Pi?
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0answers
31 views

Fesibility of mobile Pi Project [on hold]

I am thinking of a project where I have a Pi returning lat/long from my vehicle's position, lets say a lowjack system. My question, is such a project feasible using the Pi? seeing that A) the pi is a ...
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0answers
11 views

Can i run multiple Raspberry Pis together to build a workstation? [duplicate]

I have taken interest to Raspberry Pis recently and want to start a project. I have not yet used or purchased a Pi yet so i have a couple questions before i do. Is it possible to connect multiple Pis ...
0
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1answer
33 views

Write interrupt data into a Raspberry pi Register on C?

I'm trying to read interrupts and detect direction of interrupts from an encoder using a raspberry pi , it is USdigital Brand "H6BM-1000-500-IE-S-H" , it has 1000 signals per revolution , the thing ...
0
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1answer
45 views

Fastest Hardware Interrupt software?

I'm wiring my Raspberry pi to a USdigital encoder , especifically this model "H6BM-1000-500-IE-S-H" , it has 1000 signals per revolution , I've followed the tutorial on ...
3
votes
1answer
45 views

Connecting a 24v appliance(solenoid) to Raspberry Pi

I am trying to do an Internet of Things project with the help of a Raspberry Pi. While most of the project is complete, there is one small thing I am stuck at. I need to connect a solenoid valve to ...
0
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1answer
45 views

20x4 LCD Shield for Pi?

I'm attempting to build a user interface that provides minimal access to only a few crucial configuration options (network config, host name, reset defaults, etc). I have a SainSmart 20x4 LCD that ...
-1
votes
1answer
41 views

Is there a drone kit that connects to a raspberry pi?

I am trying to build a drone with any amount of propellers(quadcopter,single,double,octo,etc.). I am not trying to do so much work of programming it, but I do want to assemble it. I'm looking for ...
3
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2answers
44 views

Detect milisecond on hardware

I'm trying to start a project as described: When someone presses a button I need to start a stopwatch. Then, when someone presses another button (hardware button), I detect the elapsed time from the ...
3
votes
1answer
36 views

Is there way get the GPU-load average per second?

I am interested to get the GPU-load average over, for example, an interval of one second. Alas, I was unable to find a direct way to get this information with the current API or tools ( vcgdb or ...
4
votes
1answer
52 views

Looking for lab test results for the PI's random number generator

I'd like to host my electronic raffle system on a Pi 2 or Pi 3. However, in some jurisdictions, the random number generator must be certified by an independent testing lab. Have you ever seen any ...
1
vote
1answer
49 views

Micro SD card slot on Pi 2

I've just received a Raspberry Pi 2 and tried to insert the micro SD card, but for some reason the mechanism doesn't appear to be working correctly. You hear a click and can observe the card ...
0
votes
1answer
17 views

Multi Display configured to cube like format?

I was wondering if there was any program or way for a pi/alternative SBC to output to several displays 4-6 as a single canvas. The wrinkle is that this single canvas needs to wrap around as if each ...
0
votes
1answer
44 views

Safe to solder directly onto Pi GPIO pins?

I just purchased an Adafruit 2.2" PiTFT screen with the intent of fitting it inside an official Raspberry Pi case. If fits pretty well just resting directly onto the GPIO pins (without the supplied ...
3
votes
4answers
573 views

What can Raspberry Pi do that my Linux desktop can't

I have been told by some friends that Raspberry Pi computer is the "next best thing". I am trying to understand what it is and what it can do before I jump on the bandwagon. After doing some ...
0
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1answer
26 views

sense hat sample “snake” returns “event device not found” error

My "sense hat" sits ontop of a raspberry pi 3. I've completed the installation instructions found at https://www.raspberrypi.org/documentation/hardware/sense-hat/ lexu:~> sudo apt-get update ...
1
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1answer
84 views

Solder USB to Raspberry Pi 2

Alright guys, I have a question in how to solder an additional USB port to the board. I have an old security camera system dvr that I've taken apart and gutted to install my raspberry pi and tb hard ...
0
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1answer
48 views

Where can I get FULL mechanical drawings of Pis?

Anyone know where I can get the FULL mechanical drawings of the Pis? I have found many drawings - but the cover only the top PCB perspective - i.e. the do not cover left/right/front/back ...
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0answers
17 views

Raspberry Pi Nokia5110 not working after first use

So, I just connected my Nokia5110 screen to my raspberry2 following these instructions, and everything went great. The only problem is that my screen was upside down. I shutdown the machine and change ...
1
vote
3answers
64 views

Can I control a DC 3-6v Gear Motor without any driver?

I was wondering if I can control a DC 3-6v Gear Motor without any thing but my Raspberry Pi. I have provided an image of what I have done and it does not seem to work but when I plug the positive side ...
4
votes
1answer
592 views

Raspberry Pi Business use VS Personal use

I am new with Raspberry Pi... Since I wanted to buy one piece of raspberry pi, on the website I found (RS online) that there are 2 possibilities: Buy your RPi 3 model for business use Buy your RPi 3 ...
3
votes
1answer
105 views

Where can I find Raspberry pi 3 complete data sheet

I heard Raspberrypi is an open source project. Where can I get Raspberry pi 3's complete documentation of hardware design and data sheet? I bought a RPI3 and I want to look whether the Micro USB ...
0
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0answers
42 views

File transfer failing (SSH and Samba)

I currently have a Pi 2 with a 2.1 A power supply, a powered USB hub (separate mains supply), and plugged into that, is a powered USB2 HDD (HDD has its own mains supply). The entire HDD is shared via ...
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0answers
14 views

What refresh rate is used on the 7" DPI panel (with the closed driver)?

In debugging the open source driver's DPI panel support, I noticed that I was choosing a weird clock rate for the 7" DPI panel (working out to 38.7Hz refresh rate, when I meant to get 60Hz). Looking ...
0
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0answers
43 views

Power On/Off and Regulator Schematic Design

For my final year project, I'm designing an add-on PCB circuit that connects to the Raspberry Pi A+ by means of jumper wires as opposed to the GPIO directly. This is due to size restrictions on the ...
0
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2answers
127 views

How can I control the red LED again

I just acquired the latest Pi-3. In the Pi B+ and Pi 2 it was possible to access both the red and green LED through /sys/class/leds/led0 and /sys/class/leds/led1. After setting up the Pi 3, I have ...
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0answers
88 views

Touchscreen not working for 7" HDMI display

I have a 7" HDMI display with touchscreen from Adafruit. I connected it via HDMI and USB (for power and probably for transferring some touch data). Everything is working well except the touchscreen ...
0
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1answer
50 views

How to Mount FAT32 Format Drive on Raspberry Pi

I've tried a few commands and it seems like my drive isn't even being detected. Here's my df -l. Filesystem 1K-blocks Used Available Use% Mounted on /dev/root 5755184 4613132 826660 ...
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0answers
29 views

Problem with 3.5mm to rca for raspberry pi 2

I wnat to connect my raspberry pi 2 model B to an ovle tv with av cables. I have bought an 3.5mm to rca convertor. But when I turn the rpi on i see a black and white wave on TV. What's the problem???
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0answers
14 views

how to controll house climate system [duplicate]

I'm not very strong in electronics so my question is - how can I connect RPI GPIO to one of my house equipment physical switch that has 13.5 V in open state and 5mA current when switched on ok in ...
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1answer
51 views

Connecting GPS Breakout to Pi

Good day While looking for the smallest possible GPS solution for a Raspberry PI 2 searching has brought me to these solutions. https://www.sparkfun.com/products/13670 ...
0
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1answer
61 views

GPS from cell tower/GPRS to Pi

I am trying to create a solution where my Pi sends GPS coordinates to a database server and at the same time keep my cost of items as low as possible. I have the Pi and a USB dongle which I will be ...
0
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0answers
26 views

MCP3008 Raspberry Pi Voltage Measurement

Has anyone interfaced MCP3008 with the Raspberry pi to measure voltage? Is there a circuit available with the code? I have used the online guide to wire the MCP3008 : ...
0
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0answers
48 views

White screen on LCD screen even after installing the drivers

When I first set up my raspberry pi screen I had this problem with the white screen: White screen on touchscreen display But now even after installing the drivers I get the same white screen on the ...
0
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2answers
81 views

What is the maximum number of modules I can connect to Raspberry Pi 2

I am starting a pet project that involves Raspberry Pi 2 and I was wondering. What is the maximum amount of GPIO modules I can connect to a Raspberry Pi 2? I Basically my question does not involve ...
0
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1answer
50 views

Circuit to Interface 12v DC motor with raspberry pi2 using L293d ic for Forward,reverse,Stop function

I want to interface 12 dc motor with Raspberry pi 2. I tried by switching the transistor for forwarding and stopping the motor.How can i do it by doing with L293d ic.By giving 12v in L293d vcc2 pin ...
0
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1answer
105 views

Audio input to Raspberry Pi

Can I use 3.5mm jack to USB converter in order to connect a headset to my Raspberry Pi 2. I want to use headset with microphone as input device. When headset is connected to 3.5 mm audio jack it can ...
1
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0answers
79 views

Send and receive 868Mhz radio signals

In my home I have sun-shade that I can control via a handheld transmitter. I already figured out that it is sending on 868 mhz. Now I'd like my raspberry to read send those signal instead (or as well ...
0
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2answers
79 views

Cores on the Raspberry

How useful are the quad cores in the Raspberry Pi 2 and 3, and how does the 64 bit architecture express itself also in comparison to 32? Are there any interesting lectures about those themes?
8
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3answers
916 views

Maximum current on each GPIO pin for Raspberry Pi 3 Model B

Anyone knows what's the maximum input/output current for the individual GPIO pins? Perfectly fine if someone is able to point me to the Broadcom BCM2837 datasheet, which I for some reason, cannot ...
1
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0answers
42 views

Problems with Kali on raspberry pi, plus some mac issues

Just yesterday I was able to boot Kali on my raspberry pi without much of a problem. The following day, however I tried booting it as usual. It showed the boot screen and everything with the four ...
0
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1answer
31 views

Low voltage and debounce issues in an industrial environment

I have about a dozen Raspberry Pis running in an industrial environment with a lot of motors and variable frequency drives. I detect when a machine is running via a heart beat to one of my inputs. ...
4
votes
2answers
117 views

Raspberry Pi USB Bus Speed

For the Raspberry Pi 1 I found some documentation (which I now can't find!) stating that the Ethernet NIC was connected via a USB bus so despite being a "100Mbps" NIC it had a max potential throughput ...
1
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0answers
18 views

Sudden weird software problems, even with known good backups. Could ESD do that? [closed]

I had just figured out another step in setting up a headless audio hub in a portable sound system. (local recording and playback, plus streaming a mic and headphones to and from the sound guy's ...
0
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0answers
18 views

Want to read data/output from boolean IC to 7" Pi LCD screen

I mainly want to have something I can troubleshoot a small electronic device or help reverse engineer it using i/o. I just want to look at outputs on a screen, much like using Putty on a PC screen. ...
1
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0answers
84 views

Communication between Raspberry Pi and a PLC [closed]

Migrated from: http://stackoverflow.com/q/35615246/3979290 I have an ABB PM554-E-TH Programmable Logic Controller and a Raspberry Pi. I need to be able to connect both via a LAN and wish to create ...
1
vote
1answer
81 views

Raspicam images are way too dark when raspistill is not used

I am trying to grab continuous images using Raspicam 1.3v on Raspberry Pi 2. I use c++ and the following library for interface: http://www.uco.es/investiga/grupos/ava/node/40 When I use raspistill, ...