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by johndough
Thu May 22, 2014 10:00 am
Forum: Advanced users
Topic: Controlling 32 lights with the Raspberry Pi
Replies: 9
Views: 4114

Re: Controlling 32 lights with the Raspberry Pi

Hi guys, Thank you so much for the help but I found a company that supplies exactly what I need: http://www.deweerd-emst.nl/catalog/product_info.php?products_id=43253 (dutch website) I am situated in the Netherlands and was shocked that this company was so close to me. Thanks again for the help. At...
by johndough
Wed May 21, 2014 8:06 am
Forum: General discussion
Topic: Model A specification arguments
Replies: 53
Views: 4796

Re: Model A specification arguments

VAT or sales tax varies by location - so why state many different prices, and of course schools can reclaim the vat portion, so do in fact get them for $25. Pi has always been primarily targetted at education after all. Indeed. When saying "You can't get it for $25" I thought about kids, parents, t...
by johndough
Mon May 19, 2014 4:40 pm
Forum: Off topic discussion
Topic: 12v timer
Replies: 7
Views: 2690

Re: 12v timer

looking for omething that will do as follows apply power ..... after 20 mins turn on stay on for 1 min turn off then after 20 mins turn on stay on for 1 min turn off and so on i *THINK** this might be suitable but instructions are flaky http://www.ebay.co.uk/itm/24V-12V-5V-Relay-Module-Cycle-Timer-...
by johndough
Sat May 17, 2014 10:06 am
Forum: Automation, sensing and robotics
Topic: Relay Module KY-019 5V
Replies: 488
Views: 82095

Re: Relay Module KY-019 5V

Looking at the specs, it does clearly state '3.5 V-12V to TTL control signal'. Expecting it to switch reliably at 3.3V is expecting it to reliably work out of spec if I'm interpreting the data correctly. It's often difficult to interpret specs when they're not written in correct English. Hi Actuall...
by johndough
Fri May 16, 2014 10:17 am
Forum: Automation, sensing and robotics
Topic: Relay Module KY-019 5V
Replies: 488
Views: 82095

Re: Relay Module KY-019 5V

Hello, What is the most simple way to make Relay Module KY-019 5V work with GPIO? http://okystar.en.alibaba.com/product/1498514200-220205206/1_channel_Relay_Module_KY_019_5V_Relay_for_Arduino.html This relay is working fine while it is operating in room temperature, but if I put it in sealed box to...
by johndough
Fri May 09, 2014 11:37 am
Forum: Other projects
Topic: Experiences with Braille
Replies: 2
Views: 1167

Re: Experiences with Braille

Hi

You may already know this

SuSE has/had a programmer who used a braille display, and if you power up a Pi with the OpenSuSE distro you might notice the 'searching for a braille display' early on in the boot process.
by johndough
Thu May 08, 2014 8:19 am
Forum: Troubleshooting
Topic: P1 gpios bust, but P5 gpios OK.
Replies: 6
Views: 820

Re: P1 gpios bust, but P5 gpios OK.

joan wrote:Re: http://www.raspberrypi.org/forums/viewt ... 54#p546954

Can anyone think of a failure cause which would kill the gpios on P1 but leave the ones on P5 OK?
Hi

Not really.

Putting into SAFE_MODE by shorting pins 5 & 6 is a possible cause,
IE: a short from the 5 volt pin to the gpio.
by johndough
Wed May 07, 2014 8:32 am
Forum: Troubleshooting
Topic: need serious help
Replies: 10
Views: 1205

Re: need serious help

Hi

If you list your hardware and OS etc.

Then tell us what you have tried and it's outcome.

Nowhere in the posts are you positive about any action.
by johndough
Tue May 06, 2014 10:54 am
Forum: Automation, sensing and robotics
Topic: [?] Light Switch
Replies: 37
Views: 11115

Re: [?] Light Switch

Hi ############################ Probably cheaper RS Stock No. 628-0432 Manufacturer Song Chuan Mfr. Part No. SCLB-W-LM-DPDT-C 230VAC SGD5.60Each RS Stock No. 628-0246 Manufacturer Song Chuan Mfr. Part No. SCLB-W-DPDT-C 12VDC SGD5.60Each RS Stock No. 628-0448 Manufacturer Song Chuan Mfr. Part No. SYF...
by johndough
Mon May 05, 2014 9:08 am
Forum: Automation, sensing and robotics
Topic: [?] Light Switch
Replies: 37
Views: 11115

Re: [?] Light Switch

Hi Well I suggest the Finder Series 46 with a series 97 base. 46.52 Choose 230/240v AC coil voltage. • 2 Pole CO, 8 A • Plug-in/Solder terminals 46.52 Choose 12v DC coil voltage. • 2 Pole CO, 8 A • Plug-in/Solder terminals 2 Bases, they should have a din rail capability and screw mount also. 97-02 #...
by johndough
Sun May 04, 2014 11:31 am
Forum: Automation, sensing and robotics
Topic: [?] Light Switch
Replies: 37
Views: 11115

Re: [?] Light Switch

Hi Well I can hopefully help. You need 2 relays with bases and a box to put them in. http://en.indotrading.com/relay_166/ 44 Series Page 55 Plug-In Pcb Relays Finder [Feb 10 , 2014] Relay Price : IDR CALL Min Order: 0 Schneider Relay 230V 50/60Hz Available In Pd. Anugerah Sejati Is Located At Ltc Gl...
by johndough
Sat May 03, 2014 10:20 am
Forum: Automation, sensing and robotics
Topic: [?] Light Switch
Replies: 37
Views: 11115

Re: [?] Light Switch

Hi Somewhere earlier I posted something like this... SOME SIMPLE RELAY KNOWLEDGE Having worked with mains voltages, and lower, for about 45 years I want to attempt an explanation of how to control equipment etc with relays, digitally or manually switched. These are my thoughts and views, and not a s...
by johndough
Wed Apr 30, 2014 8:15 am
Forum: Troubleshooting
Topic: Help Me please
Replies: 6
Views: 1155

Re: Help Me please

LOVE-MATH123 wrote:When I boot my raspberry pi and when I get this scrolling text this message comes up

Entering kbd (current=0xd6840000, pid 1) due to Keyboard Entry
kdb>_
Hi

I had that error message, with a keyboard connected and without.

Downloaded a new image and redid the card.
by johndough
Mon Apr 21, 2014 1:03 pm
Forum: General discussion
Topic: Pi Hater?
Replies: 20
Views: 3030

Re: Pi Hater?

Its still Debians Wiki and I doubt the Pi will ever meet the criteria for openness that a Debian hard-liner demands whilst its got a Broadcom Chip in it. You may as well try and solve the Arab-Israeli conflict. Hi Of course some people are quite keen on "open-ness". I guess the Intel processor is c...
by johndough
Mon Apr 21, 2014 9:56 am
Forum: Automation, sensing and robotics
Topic: Using 5V Input into GPIO
Replies: 11
Views: 10178

Re: Using 5V Input into GPIO

A voltage divider Thank you. I didn't realise I knew what a voltage divider circuit was. My base is a single bar electric fire (now obsolete) 250 volts 4 amps 1000 watts 62.5 ohms. (As a check to remember how to use ohms law). The thing is linear so the voltage drop etc easy to understand. Now look...
by johndough
Sun Apr 20, 2014 11:24 am
Forum: Automation, sensing and robotics
Topic: Relays and the like
Replies: 15
Views: 2483

Re: Relays and the like

Ah sorry I changed name half way through, I'll correct it :oops: The powerbank is a battery, but it's a pre-made unit that handles charging and has a power button rather than just a battery which needs to be disconnected. I have a physical switch, if there is power (the Pi is on) I would like the r...
by johndough
Sat Apr 19, 2014 11:07 am
Forum: Picademy
Topic: How to get some pis
Replies: 13
Views: 3925

Re: How to get some pis

I have an idea on how I can use some money to buy some pi's but just need a project. Each year we are meant to buy in CPD and do a two day project with new y5+6 as a sales event for the school. Cut out the middle man and use the money for pi but....... It has to be brazil themed. Any ideas Hi Brazi...
by johndough
Sat Apr 19, 2014 10:55 am
Forum: Automation, sensing and robotics
Topic: Relays and the like
Replies: 15
Views: 2483

Re: Relays and the like

Sorry if this is the wrong place but it seems like the most hardware oriented section :) I'm trying to make a Pi power on and off using one momentary switch and a powerbank which has a momentary on/off button. What I need to achieve is very simple in words but I'm not entirely sure what component(s...
by johndough
Thu Apr 17, 2014 8:15 am
Forum: General discussion
Topic: new website too slow and heavy!!
Replies: 22
Views: 3771

Re: new website too slow and heavy!!

Hi

Overlap is my problem.
overlapped.PNG
overlapped.PNG (51.05 KiB) Viewed 3660 times

If I select a readable size font for me then I get the right hand side covering the blog bit.

Using XP and Firefox.
by johndough
Wed Apr 16, 2014 12:47 pm
Forum: Automation, sensing and robotics
Topic: Extreme Low-Cost 3D Printer
Replies: 10
Views: 7409

Re: Extreme Low-Cost 3D Printer

Hi

I don't think it a practicable proposition.

£100 for a home made 3d printer?

An RS version is RM2800.00 (£530.00) from Singapore, the disparity makes me think to buy and "copy" the RepRapPro, then sell it on to recover as much money as possible, or use to generate some income.
by johndough
Tue Apr 15, 2014 9:46 am
Forum: Staffroom, classroom and projects
Topic: Redesigning the soldering iron!
Replies: 49
Views: 12673

Re: Redesigning the soldering iron!

Hi, we’re a team of engineering undergrads hoping to redesign the soldering iron. Specifically, we’re looking at making it safer and more usable by younger teens and children. Hi Well how about "asbestos" gloves? Leave the iron alone and make using it different. Gloves, large heat-sink. Retractable...
by johndough
Sun Apr 13, 2014 5:08 pm
Forum: Gaming
Topic: Assining GPIO pin to ground?
Replies: 25
Views: 18197

Re: Assining GPIO pin to ground?

I can't picture what you mean. Could you post a photo of your set-up? Hiya His problem is wiring directly to the end device. A connector that could join common wires together would solve the problem. Reconfiguring a GPIO to be a GND is also a possibility. Breadboard. A lack of experience and parts ...
by johndough
Mon Apr 07, 2014 9:46 am
Forum: General discussion
Topic: HiPi
Replies: 2
Views: 524

Re: HiPi

Hi all i am a complete noob, but trying to help my 11 year old son, i want to use HiPi ::BCM2835 to simply turn on gpio18 to flash a led but i cannot find an example anywhere could anyone point me in right direction google doesnt provide any answer Hiya Perhaps reading early editions of the MagPi m...
by johndough
Sat Apr 05, 2014 6:19 pm
Forum: Français
Topic: Raspberry & VOIP
Replies: 3
Views: 783

Re: Raspberry & VOIP

Bonjour, J'aimerais installer sur mon pi un client voip pour communiquer avec un client voip sur mon iphone. J'ai une enceinte et un micro branché sur le rpi. Est ce que quelqu'un peut m'orienter sur un tutoriel ? Me conseiller un soft sur le pi ? un soft sur l'iphone ? Merci d'avance https://www.v...
by johndough
Fri Apr 04, 2014 12:22 pm
Forum: Beginners
Topic: Powering Pi with batteries
Replies: 30
Views: 4469

Re: Powering Pi with batteries

I want to power the huawei ec152 and the ps3 eye camera(500mA) using batteries. I have made a battery pack using 8 AA batteries(1000mAh). Is it possible to run these two usb devices simultaneously (without using a powered usb hub) ? I cannot afford a powered usb hub, so , can you tell me how to mak...

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