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by Raspberry wino
Tue Jul 22, 2014 7:41 pm
Forum: General discussion
Topic: Happy Pi Approximation Day!
Replies: 10
Views: 1908

Happy Pi Approximation Day!

I'm just off to a pub quiz and there's usually a round on what happened this day in history, so I looked for a handy list. One thing notable about today's date - it's Pi Approximation Day: 22/7.
by Raspberry wino
Sat Aug 17, 2013 11:18 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Shift register help!
Replies: 13
Views: 6297

Re: Shift register help!

I'm doing the same, with the same chip. But an HC type chip, if running on 5V is no good as it won't read data input reliably from 3.3V logic such as the Pi. So I used an HCT type (74HCT245) as a crude level shifter. If I'd known I'd have got an 74HCT595 for simplicity but I'd never worked with 3.3V...
by Raspberry wino
Sun Aug 11, 2013 4:15 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Interfacing troubleshooting
Replies: 2
Views: 577

Re: Interfacing troubleshooting

I'm pretty much at the same stage as you are I think. But my experience of getting things working in hardware/software in the past with no test gear, I'd say keep it simple and keep asking if what you see is what you expect to see. A long time ago (for 8051 processor circuits) I made a simple tester...
by Raspberry wino
Tue Jul 23, 2013 7:24 pm
Forum: Off topic discussion
Topic: lost RPi wiki?
Replies: 3
Views: 808

Re: lost RPi wiki?

OK, thanks.

Maybe the wiki indirection page and link to it could be reinstated, with appropriate health warnings.
Or maybe the useful stuff from there could be given a home here and kept safe by our mods.
by Raspberry wino
Tue Jul 23, 2013 12:56 pm
Forum: Off topic discussion
Topic: lost RPi wiki?
Replies: 3
Views: 808

lost RPi wiki?

I'm sure there used to be a useful wiki with lots of handy info and a link to it on the top of this site but after 20 mins poking around I can't find it. I tried searching for 'wiki' but there are over 9000 results and nothing helpful in the first couple of pages. Am I missing something obvious? Has...
by Raspberry wino
Wed Jul 03, 2013 11:19 pm
Forum: General programming discussion
Topic: How to play a sound (music)? Not ogg or mp3 s!
Replies: 7
Views: 4510

Re: How to play a sound (music)? Not ogg or mp3 s!

The RPi does have an audio output, where does the signal come from? Does it mean there is a simple D/A on board? Can it be controlled?
by Raspberry wino
Fri Jun 14, 2013 1:52 pm
Forum: Automation, sensing and robotics
Topic: PWM for servos, motors, and LEDs plus plus
Replies: 71
Views: 40819

Re: PWM for servos, motors, and LEDs plus plus

This looks so useful - and very nicely documented too. A C library of functions to control GPIO with command line interface too makes it just what I wanted but I'm not sure your thread title will bring it the attention this deserves. ...anyway... I installed the hard float version as you suggested a...
by Raspberry wino
Tue Jun 11, 2013 6:47 pm
Forum: Automation, sensing and robotics
Topic: PWM for servos, motors, and LEDs plus plus
Replies: 71
Views: 40819

Re: PWM for servos, motors, and LEDs plus plus

Will do; thanks for rapid response.
by Raspberry wino
Tue Jun 11, 2013 6:25 pm
Forum: Automation, sensing and robotics
Topic: PWM for servos, motors, and LEDs plus plus
Replies: 71
Views: 40819

Re: PWM for servos, motors, and LEDs plus plus

This seems like just what I always wanted but I don't know whether to choose hard or soft float version. It's months since I got my RPi and I can't remember which OS I've got. It mentions Debian when it boots so that mean I'm on Raspian? If so which should I choose hard or soft?

Thanks.
by Raspberry wino
Fri May 31, 2013 9:32 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Controlling RGB LEDs
Replies: 5
Views: 3710

Re: Controlling RGB LEDs

I've got a couple of rolls of those 12V LED strings and plan to do things with them. The only thing I achieved so far was to make a 'Christmas Star' which twinkles nicely. No Raspberry Pis were involved, it's controlled by an 8051 (running on 5V) the outputs of which feed a ULN2803 which can drive 5...
by Raspberry wino
Sat Feb 09, 2013 12:43 am
Forum: Automation, sensing and robotics
Topic: 120V AC Light Dimmer
Replies: 5
Views: 5270

Re: 120V AC Light Dimmer

If you're running some variety of Linux which most Raspis will, I think it'll be hard to damn near impossible to guarantee sufficiently accurate timing for such a task. You'd be much better off using a microcontroller: PIC, Arduino etc where a very small program is all it does and you can guarantee ...
by Raspberry wino
Mon Oct 22, 2012 10:55 pm
Forum: Staffroom, classroom and projects
Topic: What chance the Raspi against the might of Microsoft
Replies: 31
Views: 6637

Re: What chance the Raspi against the might of Microsoft

Microsoft on the other hand have provided their (again I have to say this grudgingly) really rather good .net framework as well as lite versions of their IDE for free! Thus circumnavigating people criminalising themselves just because they want to learn! Good business and good for society in genera...
by Raspberry wino
Fri Sep 07, 2012 10:00 am
Forum: Off topic discussion
Topic: Can I share my laptop's internet connection?
Replies: 21
Views: 11648

Re: Can I share my laptop's internet connection?

When I got broadband, I also got a 4-port wired router. Whenever I want to connect more than one computer to the internet, I use an Ethernet cable to connect it to the router. I'm a Linux user and it just worked with no fiddling about. Is internet sharing more difficult if you use MS Windows? Surely...
by Raspberry wino
Tue Jul 31, 2012 5:16 pm
Forum: General discussion
Topic: First 'C' Hello World Program on Raspberry Pi
Replies: 21
Views: 14319

Re: First 'C' Hello World Program on Raspberry Pi

I rarely even have a keyboard connected to my Pi, everything is done via ssh. Here's a complete idiot's guide to doing a hello world c program remotely on the pi: - download putty from http://www.putty.org/ - run it and type in ip address of the Pi - click open - Login with normal user/password nan...
by Raspberry wino
Tue Jul 24, 2012 10:25 am
Forum: General discussion
Topic: Search function failure?
Replies: 5
Views: 1043

Re: Search function failure?

Thanks both.

I (a human) see 'raspi-config' as a single character string containing a hyphen because there are no spaces.
The search function sees two strings because there is an embedded hyphen, which seems perverse.

At least the mystery is solved.
by Raspberry wino
Mon Jul 23, 2012 11:15 pm
Forum: General discussion
Topic: Search function failure?
Replies: 5
Views: 1043

Search function failure?

A day or two ago I had a query about raspi-config so I typed it into the search box to find relevant threads but it said no matches and so I started a thread to ask my question. Today I found a thread with raspi-config in the title and body. I tried a search and it still doesn't find either thread. ...
by Raspberry wino
Sun Jul 22, 2012 1:25 pm
Forum: Beginners
Topic: raspi-config
Replies: 2
Views: 1197

Re: raspi-config

asb wrote:Run sudo raspi-config and then selection "finish".
You're right I haven't done that before. After it runs it goes back to the text screen so this time I've re-entered raspi-config and selected update and finish. I hope that will sort it. Thanks.
by Raspberry wino
Sun Jul 22, 2012 1:04 pm
Forum: Beginners
Topic: raspi-config
Replies: 2
Views: 1197

raspi-config

I got my Pi on Friday and got it working last night with the new Raspbian image. Every time I boot it it says the software hasn't been fully configured and I should run raspi-config. So I do and it downloads files and extracts things and doesn't report any errors. It ends up saying '0 upgraded, 0 in...
by Raspberry wino
Sun Jul 22, 2012 10:26 am
Forum: General discussion
Topic: Order and Shipping update from RS & Allied
Replies: 775
Views: 132944

Re: Order and Shipping update from RS & Allied

andyhorn wrote:I have just checked RS for availability and they are claiming 19 weeks for dispatch, which seems quite a along time, near enough 5 months.

Andy
Order now for Christmas!
by Raspberry wino
Sun Jul 22, 2012 10:21 am
Forum: General discussion
Topic: Order and Shipping update from RS & Allied
Replies: 775
Views: 132944

Re: Order and Shipping update from RS & Allied

Hooray - I got my 'delivery imminent' email this evening from ParcelForce. So it should come tomorrow or Monday. I registered with RS probably 4-6th March. Invitation to order received 1st June, ordered 6th June. My order number was 726xx if that helps anyone. If you are in the UK (which I assume y...
by Raspberry wino
Sat Jul 21, 2012 11:47 pm
Forum: Troubleshooting
Topic: How can I tell if it works?
Replies: 12
Views: 5951

Re: How can I tell if it works?

Right, so I should do shutdown? Should the FAQ page be changed? Like any unix or Linux system, if you have any choice at all, do a proper shutdown. Actually, that applies that *any* computer system. In any case the best fast shutdown is: shutdown -h -t 0 now Then wait for the lights to drop to only...
by Raspberry wino
Fri Jul 20, 2012 9:20 pm
Forum: Troubleshooting
Topic: How can I tell if it works?
Replies: 12
Views: 5951

Re: How can I tell if it works?

There's some noob stuff on the wiki under Beginners http://elinux.org/RaspberryPiBoardBeginners http://elinux.org/RPi_Noob_Guides_for_Wheezy_using_2012-16-18_beta Thanks for the links, I've started reading them. Thanks Joan . I have the TV remote but the on-screen menus don't mention the AV or phon...
by Raspberry wino
Fri Jul 20, 2012 9:15 pm
Forum: Troubleshooting
Topic: How can I tell if it works?
Replies: 12
Views: 5951

Re: How can I tell if it works?

I don't think there's any risk to the pi in pulling the plug, but there could be a risk to your SD card. To find your pi's IP address, you could log into your router and look at attached devices. Or you could check the IP of another computer on your network and start pinging the next consecutive ad...
by Raspberry wino
Fri Jul 20, 2012 7:07 pm
Forum: Troubleshooting
Topic: How can I tell if it works?
Replies: 12
Views: 5951

Re: How can I tell if it works?

The output from the Pi is a composite signal, not an aerial UHF signal. You are stuffed unless your TV has a composite input (red, yellow, white phono plugs). See http://en.wikipedia.org/wiki/Composite_video Yes, of course, that makes sense, thanks. I've found an old phono lead (which fits properly...

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