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by mikerr
Mon Jul 09, 2012 9:11 pm
Forum: General discussion
Topic: First impression
Replies: 43
Views: 4737

Re: First impression

However, not so savvy me thought that a hdmi to vga converter would be an easy thing to come by. In this i was wrong. So as I don't have a TV my raspberry pi as a rather pretty paper weight for the foreseeable future. :( HDMI->VGA is a digital to analogue conversion, so needs electronics and is rel...
by mikerr
Mon Jul 09, 2012 6:43 pm
Forum: Python
Topic: How do I play a beep sound
Replies: 15
Views: 44234

Re: How do I play a beep sound

For a low latency beep you could preload/generate a square wave into an array, and play that.
by mikerr
Mon Jul 09, 2012 4:54 pm
Forum: Python
Topic: How do I play a beep sound
Replies: 15
Views: 44234

Re: How do I play a beep sound

To play a wav file:

Code: Select all

from pygame import mixer
mixer.init() 
alert=mixer.Sound('bell.wav')
alert.play()
by mikerr
Mon Jul 09, 2012 3:49 pm
Forum: Troubleshooting
Topic: Sound stopped working after a rpi-update
Replies: 7
Views: 3661

Sound stopped working after a rpi-update

I had sound working mostly fine on wheezy, but had the common "spike of noise" at start of playback over the analog port. Read on here that the issue was fixed, so did an rpi-update - now I have no sound at all, and worse than that any attempt to play sound freezes the application. e.g. to test: # g...
by mikerr
Mon Jul 09, 2012 2:53 pm
Forum: Bare metal, Assembly language
Topic: ARM assembler tutorial for Raspberry Pi
Replies: 25
Views: 20150

Re: ARM assembler tutorial for Raspberry Pi

I liked that you made an image of the code, and this comment:
"Wot no file to download?

- Sorry I'm a firm believer in the "type it in yourself" school of learning to program."

Takes me right back to listings in zx81 magazines ;)
by mikerr
Mon Jul 09, 2012 1:53 pm
Forum: Python
Topic: How do I play a beep sound
Replies: 15
Views: 44234

Re: How do I play a beep sound

kghunt wrote:The pi doesn't have an internal speaker. You will need to attach one to the GPIOs.
..or just attach a speaker to the Pi's analog 3.5mm jack !
by mikerr
Mon Jul 09, 2012 1:37 pm
Forum: Automation, sensing and robotics
Topic: Balancing Robot
Replies: 183
Views: 51014

Re: Balancing Robot

Two wheel segway type balancing can be done without gyro / accelerometers to an extent - you only really need to know the angle & direction of fall - and you can get that by measuring the distance to the floor - I've seen them done with just photo resistors. I did one with arduino and just a cheap(£...
by mikerr
Mon Jul 09, 2012 12:48 pm
Forum: Graphics, sound and multimedia
Topic: Motion - Possible Resolution on RPi
Replies: 2
Views: 1813

Re: Motion - Possible Resolution on RPi

I've had 1024x768 on both Logitech Pro 9000 and Microsoft Lifeecam nx-6000 using motion.

Both ran for several hours without problem - apart from the SD card running out of spcae for saved frames !
by mikerr
Fri Jul 06, 2012 1:50 pm
Forum: General discussion
Topic: There's a business in that for someone...
Replies: 26
Views: 5272

Re: There's a business in that for someone...

Well it's quite absurd to compare a streaming-only solution with a full on recording HD PVR ! -especially purely on price. You may not want to record or watch live broadcast TV - but that's what the £299 box is for; recording HD TV with twin tuners and 500GB HD, the streaming is an added plus - not ...
by mikerr
Fri Jul 06, 2012 1:08 pm
Forum: Graphics, sound and multimedia
Topic: Can Pi drive a 3D TV ?
Replies: 4
Views: 3750

Can Pi drive a 3D TV ?

Is it possible (software permitting) to drive a 3D TV with a Pi at the hardware level?

AIUI it requires an HDMI 1.4 interface ?
by mikerr
Fri Jul 06, 2012 11:04 am
Forum: General discussion
Topic: Does anyone have this cheapo DVB-T/Analog tuner from Ebay?
Replies: 10
Views: 5054

Re: Does anyone have this cheapo DVB-T/Analog tuner from Eba

poing wrote:As far as I know DVB-T uses MPEG2 which the Pi can't decode.
The Pi CAN decode mpeg2 in software, it just can't do it hardware accelerated, so cpu usage would be high.
by mikerr
Fri Jul 06, 2012 10:17 am
Forum: Troubleshooting
Topic: hot USB port
Replies: 14
Views: 5867

Re: hot USB port

Yes, my netgear WG111v2 wifi stick gets VERY hot, but works ok. A WiFi adapter on an unmodified PI can only be run from an externally powered hub, the PI itself isn't designed to power them. Lack of ability to use wifi without a powered hub was a big problem for me - as I wanted my Pi to be battery ...
by mikerr
Fri Jul 06, 2012 10:11 am
Forum: General discussion
Topic: Mpeg 2 poll
Replies: 57
Views: 9524

Re: Mpeg 2 poll

tufty wrote:As far as I see it, the only sane option would be to bundle mpeg2 licensing with every pi sold, and take the hit, in the same way that's happening for H.264.
So roughly how much is h.264 licencing currently costing per Pi ? $2 ?

Maybe have a model C "media model" with mpeg2 included
by mikerr
Thu Jul 05, 2012 11:25 pm
Forum: General discussion
Topic: First impression
Replies: 43
Views: 4737

Re: First impression

I think you'll find modern kids know only too well how to google any problems they have, they probably find/read this place pretty quickly too. My nephew knew how to get to cbeebies to play games online at 4, he's nearly 8 and I'm expecting him to popup on facebook/twitter anytime soon ;) I only wis...
by mikerr
Thu Jul 05, 2012 11:13 pm
Forum: Gaming
Topic: Iridium Rising - 3D space combat for the Pi
Replies: 64
Views: 15415

Re: Iridium Rising - 3D space combat for the Pi

Installed this today, great stuff !

Put a video up of one of my first plays here:

http://www.youtube.com/watch?v=PmGTNvsQeVA

I managed to shoot down a fighter and then hit another head on and exploded :)
by mikerr
Thu Jul 05, 2012 8:19 pm
Forum: Beginners
Topic: USB 3.0 flash drive
Replies: 1
Views: 727

Re: USB 3.0 flash drive

Yes, but only at USB2 speeds
by mikerr
Thu Jul 05, 2012 5:42 pm
Forum: General discussion
Topic: Your favorite console based applications...
Replies: 25
Views: 11413

Re: Your favorite console based applications...

grep - search for any text inside files
by mikerr
Thu Jul 05, 2012 4:49 pm
Forum: Other projects
Topic: Embedded operating system
Replies: 5
Views: 1397

Re: Embedded operating system

I'd avoid a (windows) GUI - given people can use linux/X if they want to do that.

There is space IMO for a small footprint fast booting performance OS, with graphics acceleration
- play to Pi's strengths and the graphics is one major strength IMO.
by mikerr
Thu Jul 05, 2012 4:26 pm
Forum: General discussion
Topic: There's a business in that for someone...
Replies: 26
Views: 5272

Re: There's a business in that for someone...

Well the £299 box is also a 500GB twin tuner freeview PVR, so add another £100 or so on to the price for that, but it still makes £299 expensive. http://www.whathifi.com/blog/youview-hands-on-with-the-humax-dtr-t1000-youview-box There's still a place for PVRs, a full 12 years on from TiVo... http://...
by mikerr
Thu Jul 05, 2012 4:22 pm
Forum: General discussion
Topic: Feature request - breadcrumb trail
Replies: 5
Views: 1758

Re: Feature request,

The link you are looking for is already there at the bottom of the page.

It would be better to duplicate it at the top too though.
by mikerr
Thu Jul 05, 2012 4:20 pm
Forum: Media centres
Topic: iRacing
Replies: 10
Views: 5159

Re: iRacing

Given the hype of "a whole PC for £25" I feel there may be more posts on a similar line.
by mikerr
Thu Jul 05, 2012 4:17 pm
Forum: Beginners
Topic: Samba: Mount windows folder
Replies: 12
Views: 14446

Re: Samba: Mount windows folder

..that's under wheezy image if it makes any difference.
by mikerr
Thu Jul 05, 2012 4:12 pm
Forum: Beginners
Topic: General Observations
Replies: 20
Views: 2357

Re: General Observations

I do understand where you're coming from, and if I'm honest I was quite surprised there was no quick primer on getting logged in and starting X etc (would only be 2 sheets of A4 ?) . While the vast majority of this first batch are tinkerers who are fine with googling everything, or already have some...
by mikerr
Thu Jul 05, 2012 3:11 pm
Forum: Beginners
Topic: Samba: Mount windows folder
Replies: 12
Views: 14446

Re: Samba: Mount windows folder

Attaching to a windows XP share called "temp" containing a file hello.txt Make a directory to hold it, and mount it there: mkdir /tmp/windows sudo mount -t cifs -o username=administrator,password=secret1 //192.168.1.4/temp /tmp/windows Now access that folder like any other in linux: ls /tmp/windows/...
by mikerr
Thu Jul 05, 2012 11:25 am
Forum: Gaming
Topic: NES Operating System
Replies: 23
Views: 14389

Re: NES Operating System

Making your own "operating system" is a technically massive job taking very experienced programmers many months at best - but most people just mean "GUI front end" when they say that ;) Realistically you could achieve what you want by using linux and compiling an existing NES emulator for Pi , and g...

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