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

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Motors have stopped working

I was building a model car, and had 4 motors connected to a h bridge. Everything was working exactly as planned, the car was fully operational, but after a day I ran the program again and some of the ...
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0answers
14 views

Wireless Reed Sensors

I want to connect a Raspberry Pi wirelessly to 2 read sensors, and Sensor - Reed Switch XRF development sensor - RS and Slice of Radio - Wireless RF Transceiver for the Raspberry Pi look like what I ...
0
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1answer
40 views

How to measure the distance from pi NOIR CAMERA MODULE and the object

i need to measure the distance between the pi camera module and the object , i've found this formula distance to object (mm) = focal length (mm) * real height of the object (mm) * image height ...
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0answers
11 views

Why software emulation of S/PDIF using GPIO legs is not possible? [on hold]

I'm talking about emulation without or with minimum hardware layer. S/PDIF seems not that hard, so it is almost possible to convert levels and emulate that signal. Why it does not work?
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15 views

Powering a 12V Solenoid Valve with 12V 5a Power Supply [on hold]

I'm trying to open/close this 12V solenoid valve using this 12v 5A power supply. But, I am unsure how to interface the two. As you can see from the pictures in the links provided, the solenoid valve ...
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0answers
16 views

Connecting an Apple mouse and keyboard to Model B+

I have been given a new Model B+ for Fathers Day. I have connected the computer but my keyboard/mouse that I use with my Mac computer will not work with the PI Do I need a new keyboard/mouse to use ...
0
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1answer
33 views

How can I make my raspberry PI like the one that was sent into space?

I am wondering what external hardware it would take to send my raspberry pi into the stratosphere like the two people from Britain who sent theirs up in a weather balloon. I would like to know, how I ...
0
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1answer
39 views

How to achieve Low Power Consumption on Raspberry Pi via Software and Hardware control [duplicate]

Would like to enquire if anyone could list any/or all possible ways to achieve low power consumption on the raspberry pi. I have found that one could disable the USB ports of the raspberry pi . ...
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1answer
20 views

ALSA device order versus USB port location on Raspberry Pi 2

I have connected two identical USB DACs to my Raspberry Pi and everything seems to work well. Because these are identical, in ALSA (using aplay -lL) they are referred to as DAC and DAC_1. It seems ...
0
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1answer
34 views

Raspberry Pi and iMac display

A customer at my work has donated us a iMac G5 because it didn't do anything. We want to test if the display is still working, but I'm not sure if it will work. Does someone know if it is possible to ...
1
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0answers
38 views

Control LCD brightness via Raspberry Pi

I have bought a display from Adafruit. It is a HDMI 7 inch touchscreen display. Is it possible to control the brightness of the display via written software on Raspberry Pi OS? If so, any advice or ...
0
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2answers
43 views

Infrared detection

I'm looking into making a small robot that will be Raspberry Pi controlled. One of the features I'd like to perform with the robot is moving to a certain area via infra-red sensors. My plan is to ...
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1answer
16 views

Trying to shortcircuit a computer motherboard pin with the Raspberry Pi

So I'm working on a project which requires me to compile the kernel of my desktop machine at the office. But I do a lot of work at home using SSH. As the kernel is very delicate, it causes a lot of ...
2
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1answer
56 views

Pi draws too much current

I was playing with pi's GPIO a little and then my pi stopped working. Red LED light is barely visible, other LEDs are off. I left the pi for a day or two alone and the red light got little stronger ...
0
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1answer
30 views

Pi not responding

When I switch my RPi on, it comes up with the error script failed service py, url error unable to connect to server, and unable to connect to host. Also getting Add on has been marked as broken ...
1
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0answers
21 views

Raspberry Pis failing on HDMI hot swap

Rephrasing my question as requested: I've managed to blow up 3 or 4 RPis, models ranging from the B (just 2 USB ports) to the B+ to the quad core. It always seems to happen when I plug or unplug the ...
1
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1answer
53 views

How to install NoMachine (NoMachine.com) on Raspberry 2

Has anyone installed NoMachine (a remote desktop program) on Raspberry Pi 2? Any success or tips you can pass on? I am having problems and am a newbie at Linux/Raspberry. The specs: Raspberry Pi 2 ...
1
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0answers
37 views

I broke C13, is it serious doctor?

EDIT: I got a good answer on electronics SE, you can check it out here. While desoldering the GPIO, I accidentally broke the capacitor C13 of my raspberry pi model B (2011.12 Rev7). It is the ...
4
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1answer
69 views

Is there any “industry standard” for single-board computers?

Do Raspberry Pis, or any other single-board computer, come in any sort of industry-standard form factor? I'm trying to sell management on using Raspberry Pi, but they are stuck on the question "what ...
0
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1answer
17 views

Sending an authorization/credentials header with the Adafruit FONA

I would like to be able to send POST calls to a server that is protected, and thus need to set an authorization header like so. However, it does not seem to appear anywhere in the docs. Does anyone ...
0
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0answers
22 views

Reboot after some times a GPIO output is on

I'm using a raspberry PI B+ to drive a relay via a BJT transistor. The GPIO pin source about 8ma ( calculated, since it is driving a 600 ohm load ) so when the I/O is on there should not be a too ...
1
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1answer
56 views

copper plate came with raspberry pi

I was wondering I got two heat sinks and a copper plate what the hell is the copper plate for ? When I bought the raspberry PI 2 it came with green and black and copper. Green was the big heat sink ...
0
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1answer
26 views

Raspberry Pi Camera Module distorted colours

I've been using the same camera module for a long time without realizing some colours seem to be very off. For instance black seems to turn purple or red (see picture below). Is there any settings I ...
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3answers
51 views

Is it possible to control a stepper-motor with javascript?

So I have seen some examples, how you can control servo-motors with javascript, but we use 2 stepper-motors for our project and these use an extra library in python. So is there a way to control them ...
0
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0answers
17 views

HDMI switching Board

Quite simply I would like to have a board, if one exists, that i can plug my TV stream (the cord that comes from my cable box) into the Pi and have an HDMI come out of the pi to the TV. Using python ...
0
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1answer
36 views

Pi2 has no red light

I have been working with my Pi2 for about a 10 days, it worked OK and I had no problem, today when I was working with a step motor driver, PI suddenly turn off and now it is not turning on. Usually ...
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1answer
30 views

Running a Raspberry Pi off of a Wii Balance Board

I am working on an internet connected scale. I want it to theoretically run forever without my intervention so I picked up this battery pack for my balance board. I plan on having the board constantly ...
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0answers
28 views

Controlling Stepper Motor Responding Strangely

I'm attempting to simply move a small stepper motor over GPIO using a Sparkfun Easy Driver. This Stepper motor is the one I'm attempting to use. I'm using similar code and configuration to that shown ...
2
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1answer
53 views

Audio amplifier hardware

We design a woorden box with a highquality speaker inside. Inside the box we have a raspberry 2, which generates music. We need about 15 Watts power for the speaker, max. We could amplify the output ...
12
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1answer
213 views

Why does the SD card random write performance for record size 8-128 kB drops below the performance of record size 4 kB?

When I check the performance of SD cards for random write, I can see the performance is quite bad for record size 4 kB (this is not surprising) but then for several cards it even drops for larger ...
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0answers
24 views

Problem with hardware on raspberry A+ [closed]

i have a uncomond issue... first of all, is not the hardware i guess, because, with code, i can turn on/off the leds... connecting a buttons and setting inputs is when i have a trouble... for example ...
1
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1answer
75 views

How to send data using raspberry pi's 3.5mm audio jack?

Does any one know of any projects that are doing this? Whether or not it's even possible? EDIT: I want to send the data from RPi to the device connected on other end. My primary goal is to control ...
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0answers
60 views

Specify interrupt in devicetree overlay

I have created a devicetree overlay to add an MRF24J40 transceiver to Raspberry Pi. The interface of the transceiver is SPI and an interrupt request. After some trouble the device finally appears in ...
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1answer
101 views

When will a new Raspberry Pi be released?

I know the Raspberry Pi 2 has been released very recently, but are we likely to see a new model with more features within the next year? And is it likely the Raspberry Pi Foundation will ever produce ...
7
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3answers
2k views

Are there any damaging effects to leaving the Raspberry Pi on all the time

I have a Raspberry Pi B+ hooked up to my router and I leave it on all of the time, it rarely gets switched off. Does this cause any damaging effects to the Raspberry Pi?
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2answers
25 views

File Transfer Problems

Ihave two raspberry PI's one is a B+ and the other is a model 2. My problem is this with the B+ connected I can move files from my windows computer to the PI with no trouble but when I connect the ...
1
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1answer
120 views

Can the Pi Emulate an HID device with via USB?

Does the Raspberry Pi model B+ have the capabilities of acting as a Human Interface Device (HID) with no extra hardware (other than a USB to USB cable)? I saw this question but it was about ...
2
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1answer
137 views

Can a 10 node raspberry pi cluster use a single hardrive as storage

For a school project I'm building a 10 node raspberry pi b cluster. I've done my research and know I need an sd card for every pi I use. What I'm wondering though is when I get all the pi's ...
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0answers
39 views

SX300 Expansion Board and SATA devices

I recently came across this 'module' and I have been wondering if it can be used to have a HDD plugged in into a raspberry. Does anyone know if an additional power supply is required in order to get ...
2
votes
1answer
72 views

Controlling servo with pi-blaster works but pi-blaster.js does not

I am able to control a servo with pi-blaster from the command line successfully. However when I try to use pi-blaster.js to do so in Node.js (either at the node command line or from within a Node ...
0
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1answer
72 views

Voice recognition on arduino or raspberry pi?

I am trying to do a project with voice recognition. Which platform is better for voice recognition Arduino or Raspberry Pi? And why?
2
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1answer
134 views

SPI communication with the MCP3008 in C

I am using SPI communication with between a Model B+ and an external ADC of 10 bit resolution, the MCP3008. I have wired it with accordance to the data sheet. I am also using the bcm2835 library and ...
0
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2answers
88 views

Is the Raspberry Pi suited for sensor and voice recognition project?

I am going to do a project in which the user moves his head in order to control the cursor across the computer screen using accelerometer sensor and gyroscope sensor (not combined). And for the mouse ...
0
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1answer
43 views

Would it be possible you create a retropie cluster that would run the different processes on each individual pi? [duplicate]

Hi I'm kind of new to the whole raspberry pi thing and have been researching about retropie that allows you to emulate games on the pi. Anyway would it be possible to create a raspberry pi cluster ...
0
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1answer
28 views

Connecting Pi Video composite to a multicamera-system?

I have connected Pi to a Zmodo multichannel camera system using a cable from Pi's video composite port to Zmodo Video in. I changed the display settings of the Pi to PAL output taking help from this ...
1
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1answer
26 views

Raspberry B+ USB -remove

can anyone please me if the USB physical ports can be remover from Raspberry B+ ? I am using it in an audio app so i don't want to see them on the case. Thank you
0
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1answer
33 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, ...
2
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1answer
72 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 ...
3
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3answers
196 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 ...
1
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1answer
50 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). ...