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by johndough
Fri Feb 21, 2014 11:42 am
Forum: Automation, sensing and robotics
Topic: Linear Actuator for Door Lock Demo
Replies: 30
Views: 13440

Re: Linear Actuator for Door Lock Demo

Hi

Why not an electric strike? They are designed for the job. electric strike gets over 50 million matches on google.

It will only release the door latch, not actually open the door.

Linear actuators for a door/gate that swings thru 90 degrees is difficult geometry.
by johndough
Fri Feb 21, 2014 11:34 am
Forum: Troubleshooting
Topic: why i can't copy file from pc(window os) to raspberry pi?
Replies: 1
Views: 584

Re: why i can't copy file from pc(window os) to raspberry pi

permissions problem presumably
by johndough
Thu Feb 20, 2014 1:34 pm
Forum: Beginners
Topic: Beginners fail - NOOBS wont fit on 4GB card
Replies: 9
Views: 4835

Re: Beginners fail - NOOBS wont fit on 4GB card

Thanks for workarounds, I had already found other posts stating to delete unneeded files, but that is not the point if wanting to get the kids involved. NOOBS lite it not a solution either if following Carrie Anne's book, it is not covered. I deliberately left him to it, to make him work things thr...
by johndough
Thu Feb 20, 2014 1:22 pm
Forum: Off topic discussion
Topic: Raspberry pi with usb powered speaker
Replies: 2
Views: 1604

Re: Raspberry pi with usb powered speaker

Hiya There is an audio output on the little blue sockety thing (how technical am I?) next to the yellow s... t... a pair of headphones from the 99p shop plug in and give you a strating point. commands like lsmod | grep snd_bcm2835 modprope snd_bcm2835 apt-get install alsa-utils apt-get install mpg32...
by johndough
Thu Feb 20, 2014 1:13 pm
Forum: Beginners
Topic: Most 1A power adaptors are rubbish
Replies: 10
Views: 1892

Re: Most 1A power adaptors are rubbish

Hi

Model MWUSB3UK 5v 2100ma Premier Farnell et al. Six quid plus Vat.

What more do you need?
by johndough
Thu Feb 20, 2014 1:08 pm
Forum: Other projects
Topic: PC Fan Controller
Replies: 6
Views: 9604

Re: PC Fan Controller

Hi

What exactly is your build list?

When you say PC, what do you actually mean?

Controlling 16 fans, well if they are mains voltage buy a dimmer switch.

If they are low voltage consider speed control by pulsing. On/Off every few milliseconds will control them. Relative to temperature?
by johndough
Thu Feb 20, 2014 12:57 pm
Forum: Beginners
Topic: (SOLVED)Connect pi to internet through ethernet cable
Replies: 12
Views: 51426

Re: Connect pi to internet through ethernet cable

So i recently got a pi (model b) and because i don't have an TV or something else with a hdmi input i tried using ssh. So i have my pi connected with an ethernet cable to my router with a static ip. I can connect to the pi with my laptop through ssh, but i cant use the internet on my pi. I tried pi...
by johndough
Wed Feb 19, 2014 11:35 am
Forum: General discussion
Topic: GPIO single pin connectors
Replies: 11
Views: 4305

Re: GPIO single pin connectors

Sheila wrote:
But singles are hard to come by.
Hi

True, but for an LED you do need 2.
by johndough
Wed Feb 19, 2014 11:17 am
Forum: Advanced users
Topic: What would you like to see a new image boot up with?
Replies: 11
Views: 2464

Re: What would you like to see a new image boot up with?

Hiya Well I sometimes consider adjusting the config.txt on the first partition. The frequency seems to set at 840 and not the default 700. I could tweak it to 900 I suppose. But reading thru and noting the turbo-boost for 30 seconds option is something is something I only recently learned. # Get mor...
by johndough
Tue Feb 18, 2014 4:08 pm
Forum: General discussion
Topic: RaspberryPi Emulator on WindowsXP
Replies: 12
Views: 1661

Re: RaspberryPi Emulator on WindowsXP

Does the link that has been posted not work for you? If you want a second opinion you could try - http://xecdesign.com/qemu-emulating-raspberry-pi-the-easy-way/ Thanks I found a link that wanted me to install a backdoor TAP32 and bridge my network. So I started to alter the bat file to no use whats...
by johndough
Tue Feb 18, 2014 4:02 pm
Forum: Beginners
Topic: Trying to install Linux Kernel only
Replies: 3
Views: 559

Re: Trying to install Linux Kernel only

HI

Well surely NOOBS has a linux kernel already, in that it runs from the command line, and as your looking at embedded, wouldn't a headless arrangement give you some clues?
by johndough
Tue Feb 18, 2014 3:54 pm
Forum: Troubleshooting
Topic: Have any method for me to read the file from raspberry?
Replies: 8
Views: 1122

Re: Have any method for me to read the file from raspberry?

Why would the Pi have an Excel file? Have I missed another memo (the one telling us that MS has published a Pi version of Excel) ? Why not? LibreOffice et al while huge, can save as xls I believe. Any way if you want to transfer a file, sneaker net with a USB stick. eMail it to yourself as an attac...
by johndough
Tue Feb 18, 2014 3:51 pm
Forum: General discussion
Topic: GPIO single pin connectors
Replies: 11
Views: 4305

Re: GPIO single pin connectors

Hi

I found that old motherboards have quite a few single and double sockets, and I removed a switch and 2 LED's.

The speaker connector is sometimes a 4 way with only 2 used.

So I recycle as cheaply as I can.
by johndough
Tue Feb 18, 2014 10:26 am
Forum: General discussion
Topic: RaspberryPi Emulator on WindowsXP
Replies: 12
Views: 1661

Re: RaspberryPi Emulator on WindowsXP

ShiftPlusOne wrote:yes

Hiya

Can you give a link please?

If the answer is affirmative please post the link, and any other information that might help me track it down. TIA
by johndough
Tue Feb 18, 2014 10:24 am
Forum: General discussion
Topic: RaspberryPi Emulator on WindowsXP
Replies: 12
Views: 1661

Re: RaspberryPi Emulator on WindowsXP

The way I understood it was that the question is whether you can emulate the pi on windows XP, rather tun run windows XP on the pi in QEMU. I understood it that way too, and endorse your reply - yes, at least 2 people have. Nice one. Answering the question that was asked. Q.- Is you heart on the LE...
by johndough
Mon Feb 17, 2014 12:40 pm
Forum: General discussion
Topic: UL Approval
Replies: 6
Views: 1264

Re: UL Approval

Does Raspberry PI has UL approval ? Hi my memory says When I exported to the US from the UK there were 3 levels of electrical equipment. Cant remember the designations however.... Level 1 light bulb any one can buy and swap light bulb. Level 2 Wiring and appliances that you needed to be qualified t...
by johndough
Mon Feb 17, 2014 12:34 pm
Forum: openSUSE
Topic: suse studio
Replies: 3
Views: 3217

Re: suse studio

Hi

SuSEstudio is not for the pi, but

https://lizards.opensuse.org/2013/09/07 ... -pi-image/

may help.
by johndough
Mon Feb 17, 2014 12:27 pm
Forum: Automation, sensing and robotics
Topic: Quadcopter project, help wiring and GPIO
Replies: 15
Views: 4700

Re: Quadcopter project, help wiring and GPIO

Hi

while I shouldn't

Linux User and Developer magazine issue 136 features a raspi quadcopter project, and continues into issue 137 and who knows where else....
by johndough
Mon Feb 17, 2014 12:25 pm
Forum: Media centres
Topic: Help running audio please
Replies: 10
Views: 1706

Re: Help running audio please

Hiya There is an audio output on the little blue sockety thing (how technical am I?) next to the yellow s... t... commands like lsmod | grep snd_bcm2835 modprope snd_bcm2835 apt-get install alsa-utils apt-get install mpg321 apt-get install lame speaker-test -t sine -f 440 -c 2 -s 1 (does suggest its...
by johndough
Sat Feb 15, 2014 12:28 pm
Forum: Automation, sensing and robotics
Topic: Sensor non invasive electricity
Replies: 4
Views: 3811

Re: Sensor non invasive electricity

Hiya

Somewhere, I heard about this kind of thing at a Linux User Group in Rugby, that some smart meters have a small interface for external monitoring.
A 2 pin socket or similar.

Yes the current transformer is an option.

However googling is not very helpful for an answer.
by johndough
Thu Feb 13, 2014 9:19 am
Forum: openSUSE
Topic: Progress OpenSuSE
Replies: 6
Views: 4658

Re: Progress OpenSuSE

stanch wrote:Have you seen this:-
http://en.opensuse.org/HCL:Raspberry_Pi

Hiya

I thought that with it listing as 'armV7' it should be avoided, now I am intrigued enough to try.
by johndough
Mon Feb 10, 2014 7:44 am
Forum: Troubleshooting
Topic: Card upgrade problem (same free space)
Replies: 3
Views: 620

Re: Card upgrade problem (same free space)

Hi

If you can use Paragon Partition Manager 2014....
by johndough
Mon Feb 10, 2014 7:40 am
Forum: Advanced users
Topic: Win32DiskImager
Replies: 4
Views: 1130

Re: Win32DiskImager

Hi Paragon Partition Manager 2014 will allow you to see, and resize partitions if required in W7. Maybe a live CD would let you access your SD card and mount a HDD partition for copying space. Something like opensuse... http://software.opensuse.org/131/en will download and create a bootable USB stick.
by johndough
Thu Feb 06, 2014 12:38 pm
Forum: Troubleshooting
Topic: Extending SD card..... hours later still not working
Replies: 11
Views: 1966

Re: Extending SD card..... hours later still not working

Hi

A quick and easy way to adjust the SD card is

http://www.paragon-software.com/home/pm-express/

for Windows XP after you have put NOOBS on.
by johndough
Thu Feb 06, 2014 12:16 pm
Forum: Automation, sensing and robotics
Topic: Intelligent Alarm
Replies: 10
Views: 1850

Re: Intelligent Alarm

Hiya Well I don't know the answer. My thoughts were 'not in the bed at all'. In Dover they use a probe to find people in the back of container lorries, something to do with analysing the air. If you decided to accept that if there are people in the room at 06:00 hrs, if they are up and awake the ala...

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