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by hayderOICO
Fri Mar 20, 2015 1:14 pm
Forum: Graphics, sound and multimedia
Topic: Image Processing (Text from image)
Replies: 4
Views: 2520

Re: Image Processing (Text from image)

you need to take things step by step. 1- does your scanner work on the raspberry pi? if it does. then 2- would "preprocessing" the image with imagemagick help you get an image which is usable for OCRing. 3- Try tesseract for OCR first (maybe compile the latest version from source if the one in the r...
by hayderOICO
Fri Mar 20, 2015 1:09 pm
Forum: Graphics, sound and multimedia
Topic: new application
Replies: 2
Views: 500

Re: new application

if you use the search you'll find a whole gamut of different LCDs (from simple character LCD to small OLEDs, to high def 10" IPS type that can work... on different interfaces SPI / HDMI / component). you can attach arduino type extensions, breakout boards or use the built in GPIO directly (only 20 o...
by hayderOICO
Fri Mar 20, 2015 11:02 am
Forum: General discussion
Topic: Raspberry Pi 2 - Powerful enough?
Replies: 5
Views: 1107

Re: Raspberry Pi 2 - Powerful enough?

no. you should get yourself an Intel chip based unit with GigE, SATA and USB-3.
by hayderOICO
Fri Mar 20, 2015 10:38 am
Forum: General discussion
Topic: Help with screen
Replies: 3
Views: 398

Re: Help with screen

there are some cheapy chinese ones that work off 5V. Here's one I bought... its powered by the 5V bus from the Pi itself. http://www.aliexpress.com/item/7-inch-Raspberry-Pi-IPS-LCD-With-HDMI-VGA-AV-Screen-Display-Module-For-Pcduino-Banana/32241358353.html however its a bit dull. this screen is an "I...
by hayderOICO
Tue Mar 17, 2015 3:54 pm
Forum: General discussion
Topic: Medical Device standard IEC-60601-1:2006
Replies: 3
Views: 1249

Re: Medical Device standard IEC-60601-1:2006

thanks for the replies!

So its pretty much "OK" since I'm already using a 60601 PSU and have a double level of electrical isolation with 4mm creepage in the design... both for patient and operator!
by hayderOICO
Fri Mar 13, 2015 3:45 pm
Forum: General discussion
Topic: Medical Device standard IEC-60601-1:2006
Replies: 3
Views: 1249

Medical Device standard IEC-60601-1:2006

Hi all just a quick question... has anyone attempted certifying a medical device with an embedded raspberry Pi to meet the IEC-60601-1:2006 (3rd edition) standard? with or without the use of a "medically certified" PSU? I'm in the process of doing such a thing so wondered how anyone else has managed...
by hayderOICO
Wed Mar 11, 2015 5:03 pm
Forum: Graphics, sound and multimedia
Topic: Instant sound playback USB micrphone
Replies: 2
Views: 449

Re: Instant sound playback USB micrphone

aplay arecord together would work I guess?

arecord -f S16_LE -r48000 -c2 -D hw:1 -F0 --period-size=1024 -B0 --buffer-size=4096 | aplay -D hw:0 -

or

arecord -f S16_LE -r48000 -c2 -D hw:1 -F0 --period-size=1024 -B0 --buffer-size=4096 | unbuffered | aplay -D hw:0 -
by hayderOICO
Wed Mar 11, 2015 12:39 pm
Forum: Graphics, sound and multimedia
Topic: will this small USB mike work on Raspi?
Replies: 2
Views: 536

Re: will this small USB mike work on Raspi?

got the mike. was automatically detected on the latest raspbian and worked immediately with arecord. volume is a bit low and you can hear a bit of background noise... so messing about with settings now. this is the cheapest and most "compact" mic for the raspberry pi I've seen. next to test it with ...
by hayderOICO
Tue Mar 10, 2015 10:53 am
Forum: Python
Topic: PyAudio is unusable on Raspberry Pi
Replies: 4
Views: 2241

Re: PyAudio is unusable on Raspberry Pi

for me I used pyaudio installed using

sudo apt-get install python-pyaudio

I get version 0.2.4-2

its older than what you're using. have a go at experimenting. I had used pyaudio in the past with pocketsphinx for voice recognition stuff (didn't work particularly well).
by hayderOICO
Tue Mar 10, 2015 10:30 am
Forum: General discussion
Topic: android usb keyboard
Replies: 11
Views: 1729

Re: android usb keyboard

you would need to write a little program on android to send keystrokes over SSH to the Pi. Or just use an SSH app on android to do it... it can be a keyboard replacement in theory (I haven't tested such a thing, but have used SSH + TTYECHO to send keystroke remote commands from android to raspberry ...
by hayderOICO
Mon Mar 09, 2015 12:24 pm
Forum: Python
Topic: PyAudio is unusable on Raspberry Pi
Replies: 4
Views: 2241

Re: PyAudio is unusable on Raspberry Pi

I'm using PyAudio fine.

try a different wav file if possible. and maybe use pyaudio within a python interactive shell to see what could be causing issues.

have you tested that aplay is working ok?
by hayderOICO
Mon Mar 09, 2015 12:17 pm
Forum: Python
Topic: import RPi.GPIO as GPIO RuntimeError
Replies: 47
Views: 32310

Re: import RPi.GPIO as GPIO RuntimeError

netelbcn wrote:texy, I did these steps:
DougieLawson wrote:sudo apt-get update && sudo apt-get upgrade
And I have now the 0.5.11 versión of the RPi.GPIO library, but I still have the same error (after reboot)

Thanks!
I believe you may still have the old versions lurking about in your usr/local/lib/python* find and delete them!
by hayderOICO
Mon Mar 09, 2015 12:16 pm
Forum: General discussion
Topic: android usb keyboard
Replies: 11
Views: 1729

Re: android usb keyboard

you would need to install ttyecho on the Pi... then use SSH from the android tablet to access the Pi (can be done over the network etc...).

certainly doable... but I do believe that TTYEcho would make your life easier.
by hayderOICO
Mon Mar 09, 2015 11:56 am
Forum: General discussion
Topic: Awesome keyboard for Raspberry Pi - Cheap
Replies: 28
Views: 5864

Re: Awesome keyboard for Raspberry Pi

Compact USB keyboard with TrackPoint :?: I bought one recently from Amazon. this one http://www.amazon.co.uk/gp/product/B004US2Y52?psc=1&redirect=true&ref_=oh_aui_detailpage_o00_s00 The keyboard is OK. but the trackpad is jittery when the camera is running or some media is streaming. Its "ok" if yo...
by hayderOICO
Mon Mar 09, 2015 11:51 am
Forum: Automation, sensing and robotics
Topic: Raspberry FPV - 3G and Wi-Fi
Replies: 16
Views: 5549

Re: Raspberry FPV - 3G and Wi-Fi

you can use a "dual band pass filter" on a NOIR camera instead... so you can get both IR and colour image from one camera ;) saves you 50G in weight.
by hayderOICO
Fri Mar 06, 2015 4:17 pm
Forum: Automation, sensing and robotics
Topic: Raspberry FPV - 3G and Wi-Fi
Replies: 16
Views: 5549

Re: Raspberry FPV - 3G and Wi-Fi

nice. Have you done anything with a Compute Module or similar?
by hayderOICO
Fri Mar 06, 2015 2:56 pm
Forum: Graphics, sound and multimedia
Topic: will this small USB mike work on Raspi?
Replies: 2
Views: 536

Re: will this small USB mike work on Raspi?

just bought it from ebay from a UK supplier. will test and update here if it works. Should be useful for many people wanting to add audio input / control for their Pi.
by hayderOICO
Fri Mar 06, 2015 1:28 pm
Forum: Graphics, sound and multimedia
Topic: will this small USB mike work on Raspi?
Replies: 2
Views: 536

will this small USB mike work on Raspi?

that is the question...

http://www.aliexpress.com/item/Super-Mi ... 75996.html


should I pull the trigger and give it a test? Anyone else has tried this?
by hayderOICO
Fri Mar 06, 2015 1:23 pm
Forum: Graphics, sound and multimedia
Topic: Small cheap speakers?
Replies: 7
Views: 1868

Re: Small cheap speakers?

you can buy USB powered speakers and plug them into a USB port on one end and into the 3.5mm jack on the other.

I have a pair of "naked" 3W 4Ohm speakers setup using an PAM8403 amplifier + 5V GPIO pins for power. they're LOUD!
by hayderOICO
Fri Mar 06, 2015 12:59 pm
Forum: General discussion
Topic: Video Core Source – 1 Year On
Replies: 47
Views: 13451

Re: Video Core Source – 1 Year On

can't wait. any ETA for us mere mortals?
by hayderOICO
Fri Mar 06, 2015 12:44 pm
Forum: General discussion
Topic: Will this work
Replies: 6
Views: 648

Re: Will this work

I would say that HTML / Javascript slideshow in a web browser in LXDE will lag. You're better off writing software to do your slideshow and running that on your computer... even in something simple like python. or have a look here... http://www.binaryemotions.com/raspberry-slideshow/ or https://gith...
by hayderOICO
Fri Mar 06, 2015 11:10 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: 7-10" touch display
Replies: 3
Views: 747

Re: 7-10" touch display

this is an IPS LCD screen, but its 7" and not touch. http://www.aliexpress.com/item/7-inch-TFT-LCD-With-HDMI-Screen-Display-Module-For-Pcduino-Banana-Pi-Raspberry-Pi-800x480/2054606246.html its in china too. for a 9" with touschscreen from china have a look at this : http://www.aliexpress.com/item/T...
by hayderOICO
Fri Mar 06, 2015 10:37 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Autofocus camera using OM8825 image sensor
Replies: 6
Views: 4675

Re: Autofocus camera using OM8825 image sensor

I believe the issue is with drivers. So 99% chance it will not work. The only cameras you can use with Raspberrry Pi are: V4L2 compatible USB cameras Gphoto2 Compatible standalone cameras RaspiCam in CSI port. GigE, USB3, other CSI cameras will not work. Naturally if you use a "framegrabber" connect...
by hayderOICO
Wed Mar 04, 2015 10:27 am
Forum: Advanced users
Topic: Error building Flite for Arch on Pi
Replies: 13
Views: 2091

Re: Error building Flite for Arch on Pi

hello sorry to bring back a zombie thread. I'm trying to compile flite 2.0 and get the warnings when doing the configure. It does compile when I make, but throws a /dev/dsp missing when I try to run it. I had faced a similar issue with /dev/dsp on the fully fledged festival... but at least there's a...
by hayderOICO
Mon Mar 02, 2015 11:45 am
Forum: General discussion
Topic: Two USB cameras on the Pi?
Replies: 11
Views: 5344

Re: Two USB cameras on the Pi?

I meant this thing... http://www.hardkernel.com/main/products/prdt_info.php?g_code=G140448267127 rather more expensive than a Raspi.... however it "could" be just about powerful enough for 2 streams of USB media. But only if you insist on using the cameras you have already. The cameras you have in y...

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