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by johndough
Mon Nov 03, 2014 9:47 am
Forum: Beginners
Topic: £ Instead of Pound Sign #
Replies: 13
Views: 16867

Re: £ Instead of Pound Sign #

Hi Cisco refer to the # sign as a pound sign in their coding. One way to get a # sign without directly typing it is Alt + 0035 # on this keyboard layout, or cut and paste # # # The above show as 3 # marks but are actually a Liberation sans, Alien Encounters and Arial. The Alien encounters is a 'u' b...
by johndough
Sun Oct 26, 2014 8:56 am
Forum: Beginners
Topic: Mains AC voltage into GPIO (dont do it !!!)
Replies: 18
Views: 3774

Re: Mains AC voltage into GPIO (dont do it !!!)

Y Given a 3 phase supply and balanced loads there will be little (no) current in a neutral conductor, but just in case there is it is ok (and done) to connect the neutral point to a stake in the ground and use the Earth (note capital) as a conductor (its actually pretty good since it has huge cross...
by johndough
Sat Oct 25, 2014 9:00 am
Forum: Automation, sensing and robotics
Topic: Detecting 250VAC voltage/current of deep well pump motor
Replies: 45
Views: 16513

Re: Detecting 250VAC voltage/current of deep well pump motor

Hi This topic reminded me of how water towers were monitored. Large water tank 50 feet up, provided reserve for fire sprinklers etc, with a pulley wheel (gin wheel) on the edge of the tank. A float was connected via a swr (steel wire rope) and the wire passed through the gin wheel and down to eye le...
by johndough
Fri Oct 24, 2014 5:42 pm
Forum: Beginners
Topic: Mains AC voltage into GPIO (dont do it !!!)
Replies: 18
Views: 3774

Re: Mains AC voltage into GPIO (dont do it !!!)

Hi I don't know what you are trying to do, but that doesn't stop me having a say... You can control relays from the PI, low voltage Sainsmart which in turn can switch higher, even mains voltage. Now to have an area or section where mains should not or must not appear suggests items that could cause ...
by johndough
Sun Oct 05, 2014 8:53 am
Forum: General programming discussion
Topic: beginner
Replies: 4
Views: 1254

Re: beginner

Hi

Perhaps read through some of the MagPi editions.

http://www.themagpi.com/
by johndough
Wed Oct 01, 2014 8:55 am
Forum: Automation, sensing and robotics
Topic: Automatic Gate Using Rpi
Replies: 6
Views: 5701

Re: Automatic Gate Using Rpi

Hi

Is the gate a slide Left to Right? Is it a swing thru 90 or more degrees?

There is another thread about something similar

http://www.raspberrypi.org/forums/viewt ... 22#p619622

Automated gate.
by johndough
Wed Oct 01, 2014 8:51 am
Forum: Off topic discussion
Topic: windows 10 thoughts ??
Replies: 27
Views: 10753

Re: windows 10 thoughts ??

Hi Well I am a little confused, it started with you asking what I think... At this time of the morning? I see a screenshot on the BBC that says "One product family One platform One store" Which platform? I got mostly Intel processors, so ... or is it the PC, so me laptop gets ignored? "Windows 10 wo...
by johndough
Sun Sep 28, 2014 6:39 pm
Forum: Automation, sensing and robotics
Topic: Automated Gate
Replies: 5
Views: 3100

Re: Automated Gate

Hi Do it the other way around. You need a motor, a reduction gearbox. On the output shaft of the gear fit a sprocket from a small motorcycle. On the gate stretch and fit a length of bycicle chain, the is under tension and a few millimetre clear of the metalwork. When the motor/gearbox is fixed and c...
by johndough
Tue Sep 23, 2014 10:09 am
Forum: Automation, sensing and robotics
Topic: None wanting to use a relay switch
Replies: 8
Views: 1590

Re: None wanting to use a relay switch

Hiya

MAINS ELECTRICITY IS LETHAL.

Maybe something here that could help...

http://www.raspberrypi.org/forums/viewt ... 17#p544917

If in doubt please ask.
by johndough
Tue Sep 16, 2014 11:14 am
Forum: General discussion
Topic: NOOBS .zip download issue
Replies: 4
Views: 632

Re: NOOBS .zip download issue

Siddique wrote:I can't download NOOBS .zip file, and since I am using university internet, so torrent not allowed :( . how to download it, my kit will reach in a day or two.
Hi

What kit did you buy?

Was the sd card not included?

Have you tried the direct download? http://www.raspberrypi.org/downloads/
by johndough
Sat Sep 13, 2014 9:07 am
Forum: Beginners
Topic: absolute beginner
Replies: 17
Views: 2378

Re: absolute beginner

Hi

Learning to Drive?

Get a self drive hire car and just sit in the back seat.

Oh! you already have.
by johndough
Sat Aug 30, 2014 9:49 am
Forum: Off topic discussion
Topic: Is M$ shafting XP Skype users??
Replies: 7
Views: 1505

Re: Is M$ shafting XP Skype users??

Hiya My solution is to try Linphone I have used it on my iMac, called to iPhone. It does Win XP, most Linux Distro's and it seems to have an android etc version. I do have FaceTime, but not everyelse does, Linphone looks like everyone can have and use it. ERRrrrrr is it possibly a lack of XP3 as sug...
by johndough
Sun Aug 24, 2014 10:39 am
Forum: HATs and other add-ons
Topic: Magnetic strip reader (MSR)?
Replies: 3
Views: 1713

Re: Magnetic strip reader (MSR)?

Hi A little out of my depth, but... ################################ Prolific offers complete USB to Serial/UART and Parallel/Printer interface bridge solution for Windows, Mac, Linux, and Android platform. Prolific provides perfect solution to connect your legacy peripherals and application to any ...
by johndough
Wed Aug 20, 2014 8:44 am
Forum: Teaching and learning resources
Topic: Resources for a school in need in Malaysia
Replies: 4
Views: 1664

Re: Resources for a school in need in Malaysia

creatrixtiara wrote:Per RedditGifts' guidelines I'm not allowed to publicly mention the school (privacy concerns). I can share it privately, however.

OK.
by johndough
Mon Aug 18, 2014 10:16 am
Forum: HATs and other add-ons
Topic: Ultra Bright LEDs
Replies: 13
Views: 1942

Re: Ultra Bright LEDs

Hi

Looking from the other end and finding low current white LED's that could possibly be controlled by the GPIO

Bulb Size: 0.8mm x 1.1mm
Forward Current If: 5mA
Forward Voltage: 2.85V
LED Colour: White

and seeing if they could be cobbled into a cluster.
by johndough
Wed Aug 13, 2014 10:03 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: TTL - 250V/10A AC Relay Module Connection
Replies: 5
Views: 3184

Re: TTL - 250V/10A AC Relay Module Connection

I purchased 1 channel Keyes relay (5V~12V) for testing purpose. The relay is driven by a 9V battery. I want to on/off the relay via Pi GPIO 25pin without the success. Why? Because GPIO outputs 3.3V signal only? Thanks! Hiya Well the picture shows a Songle 5 volt relay, so the 9v and 3v3 don't match...
by johndough
Wed Aug 13, 2014 9:45 am
Forum: General discussion
Topic: Connecting a Wifi Router to eth0
Replies: 3
Views: 705

Re: Connecting a Wifi Router to eth0

Hi

Is this of any use?

http://va3paw.com/2014/03/16/hsmm-mesh-on-raspberry-pi/

The picture at the end suggests to me it might.
by johndough
Mon Aug 11, 2014 9:56 am
Forum: General discussion
Topic: Ralink RT7601 - Can't get it to work
Replies: 7
Views: 9554

Re: Ralink RT7601 - Can't get it to work

Hi I know. ################################ Googling around found this... http://va3paw.com/2014/03/16/hsmm-mesh-on-raspberry-pi/ As a result, the dongle did not work in Raspbian out-of-the-box. Luckily, the source code of a driver was available from mediatek.com which I promptly downloaded to the P...
by johndough
Sun Aug 10, 2014 9:33 am
Forum: General discussion
Topic: Ralink RT7601 - Can't get it to work
Replies: 7
Views: 9554

Re: Ralink RT7601 - Can't get it to work

BUS 001 Device 008: ID 148f:7601 Ralink Technology, Corp. I'm running Raspbian, kernel is 3.12.22+. Still can't get it to work. Hi Duck Duck Go for ralink drivers gets you to http://www.ralinktech.com/en/ then in the drivers section hunt around for... MT7601U USB 9/13/2013 v3.0.0.4 Linux http://www...
by johndough
Thu Aug 07, 2014 10:54 am
Forum: Troubleshooting
Topic: Raspbian not connecting to hidden SSID WiFi network
Replies: 13
Views: 10623

Re: Raspbian not connecting to hidden SSID WiFi network

"You would be amazed at how many people I keep off my WiFi using it." Hi I just list allowed mac addresses to connect, the list is only 4 devices long. Wireless MAC Filtering Allow All Devices, unless in Wireless Filter List X Deny All Devices, unless in Wireless Filter List tone 10:68:xx WiPiwhite ...
by johndough
Sat Aug 02, 2014 10:37 am
Forum: General discussion
Topic: wifi on Raspberry Pi
Replies: 13
Views: 1732

Re: wifi on Raspberry Pi

I am doing a test to see if I can break into different types of networks for a project for school and I would like to see if one network is harder to break into if at all and I would like to know how to do this and I have already chosen network security as my summer project. Hi Well I hope you don'...
by johndough
Wed Jul 23, 2014 8:19 am
Forum: Automation, sensing and robotics
Topic: Detecting mains voltage
Replies: 29
Views: 10928

Re: Detecting mains voltage

Hiya The programmable clock will tell you how many hours it has been on by extrapolation. IE: Twice a day for 4 hours is 8 hours, multiply by the days. Connecting an 'Hours Run' meter to the boiler will tell you how many hours the boiler has been asked for heat. Difference the 2 figures. This doesn'...
by johndough
Tue Jul 22, 2014 8:19 am
Forum: Beginners
Topic: Monitoring a 24VAC relay
Replies: 16
Views: 3083

Re: Monitoring a 24VAC relay

Hi there, so I've seen plenty of posts about controlling a relay using the GPIO ports, but what if I want to do the reverse? Specifically, I want to monitor a 24VAC output. I'm assuming the best things to do would be to have that go to a relay and them have the other side of the relay hooked into t...
by johndough
Mon Jul 21, 2014 2:04 pm
Forum: Beginners
Topic: HDMI Leads - £1 in poundland (UK)
Replies: 22
Views: 21128

Re: HDMI Leads - £1 in poundland (UK)

Poundland seems to have just realised there's life beyond composite video and scart, and my local store (Chichester) has 1m HDMI leads for..well, you know! A tad short, but a good price if you need to get one locally. I've just bought a couple to check them out and the display looks fine. Hi I have...

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