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

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2
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4answers
33 views

Raspberry Pi 3 Power supply - chargers for mobile phone

I ordered new Raspberry Pi 3 for testing Win 10 IoT. Have a question about power supply. I have two chargers for mobile phone and which one do you recommend to use: Sony Xperia Z2 = 5v 1500mA ...
2
votes
1answer
28 views

mpg2 license on RPi3

Do you need to purchase a mpg2 license for the RPi3? I thought I heard somewhere that it was included in they unit purchase price.
1
vote
1answer
39 views

HDD 2.5 with Raspberry Pi 3 Model b

I'm new on Raspberry world and bought this components: Raspberry Pi 3 Model B Power Adapter 5V 2.5A HDD 2.5 My question is: Is this enough to connect the HDD to Raspberry Pi, or must I buy a HUB? ...
1
vote
0answers
54 views

Is my Pi dead after plugging in four USB hard drives, if the power and ACT LEDs still light up?

My Raspberry Pi 2 B (rev a01041) has been working great for ages. I usually have two hard drives plugged into it. Yesterday, I plugged in another one. Today I plugged in a fourth. Immediately, the Pi ...
1
vote
1answer
31 views

Raspberry PI multiple high frequency pinout

I'm controlling 4 stepper motors with my raspberry PI, and I need to step them in a control loop cycling at a specified rate as low as once every 40 microseconds. The motors won't always be stepped ...
0
votes
2answers
77 views

LED Toggle Switch with GPIO

I have a raspberry Pi 3, and am looking to use a 3 wire automotive LED switch (think missile switch or lighted rocker switch) to trigger a GPIO pin, and power the LED when in the on position. If I ...
0
votes
2answers
73 views

RPi 3 B - On-Board wifi not present

I have this Raspberry Pi 3 B, and it seems that the on-board wi-fi is not showing at all. I have downloaded and flashed a fresh image of raspbian, but that did not help. If I use an external USB wifi ...
1
vote
2answers
30 views

Media center and web server at same time?

I'm thinking of getting the raspberry pi 3. I'd like to use it as a media center and in the future possibly set it up as a server to host my own website. Can the raspberry pi do it all at the same ...
0
votes
0answers
32 views

Raspberry Pi controlling 5v Fan using Transistor [duplicate]

I have a project that requires a fan to keep the Pi cool due to the terrible ventilation. It's a 5v 0.6w fan. So I thought I could use this wiring here: Instead of 12v it would be 5 from a UBEC, and ...
0
votes
1answer
33 views

Raspberry Pi Zero as Hardware Bypass

My girlfriend has been working on a project for a high level university CS class. The requirements are that input is take from a gaming controller, steering wheel, et al, and sent simultaneously to a ...
1
vote
0answers
20 views

Shutdown Button for Raspberry pi [duplicate]

I am using the RP3 as a NAS (OpenMediaVault installation) and would like a button that I can hold down to trigger a controlled shutdown. I had a NAS that I could shut down like that, but miss this ...
1
vote
1answer
38 views

How to use PI4J with a brushless motor?

I have a Raspberry Pi 2 model B. I would like to be able to control a motor with a regulator and PI4J. I put the black cable to a ground pin and the PWM pin to pin 26. I've worked with servos before, ...
-1
votes
0answers
10 views

imaged 16gb sd card and restored on 32 gb sd card [duplicate]

I have created image with Win32DiskImager with 16gb sd card and restored on 32 gb sd card but I don't gain 32 gb due to image was taken of 16 gb card. how do I gain the whole 32gb space.? what is the ...
3
votes
2answers
276 views

hcitool scan says No such device

Using Raspberry Pi 3, Linux test 4.4.9-v7+ #884 SMP Fri May 6 17:28:59 BST 2016 armv7l GNU/Linux root@raspberry:/home/user# hcitool scan Device is not available: No such device What can be the ...
1
vote
2answers
49 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
votes
0answers
31 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. ...
7
votes
2answers
101 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?
16
votes
5answers
3k views

Is it possible to add RAM to Raspberry Pi?

Is it possible to add RAM to a Raspberry Pi?
0
votes
0answers
13 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
votes
1answer
46 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
votes
1answer
56 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
67 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
votes
1answer
52 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
62 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
votes
2answers
51 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 ...
5
votes
1answer
47 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
60 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
58 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
18 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
52 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
601 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
votes
1answer
36 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
vote
1answer
91 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
votes
1answer
53 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 ...
0
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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
72 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
621 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
137 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
votes
0answers
54 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 ...
0
votes
0answers
15 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
votes
0answers
45 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
votes
2answers
193 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 ...
0
votes
0answers
96 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
votes
1answer
63 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 ...
0
votes
0answers
31 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???
1
vote
1answer
55 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
votes
1answer
67 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
votes
0answers
27 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
votes
0answers
57 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
votes
2answers
88 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 ...