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by johndough
Sun Sep 20, 2015 11:26 am
Forum: Automation, sensing and robotics
Topic: Beginner needs help with light control
Replies: 7
Views: 1853

Re: Beginner needs help with light control

Hi To control a light with a Pi, you can either fit a multipole relay or try a Telerupteur with a relay. https://www.raspberrypi.org/forums/viewtopic.php?f=37&t=103309&p=735567&hilit=+light#p735567 May give you an idea. http://www.schema-electrique.net/schema-electrique-telerupteur-unipolaire.html S...
by johndough
Sat Sep 19, 2015 9:07 am
Forum: Français
Topic: Carte relais 5V 20A
Replies: 17
Views: 5587

Re: Carte relais 5V 20A

Hiya

Mon idée

http://www.schema-electrique.net/schema ... laire.html

Raspberry Pi 5v - interface/adapteur (relais / transistor) - telerupteur (avec commande manuelle)
by johndough
Sat Sep 19, 2015 9:00 am
Forum: Off topic discussion
Topic: Microsoft + Linux
Replies: 7
Views: 1012

Re: Microsoft + Linux

Hi

Hmmm

It is not listed on Distrowatch, so...
by johndough
Tue Jul 21, 2015 8:51 am
Forum: General discussion
Topic: 56k Modem with Raspberry Pi
Replies: 17
Views: 3040

Re: 56k Modem with Raspberry Pi

Hello all: Not sure if this is the right forum for this topic. Please move this if needed :) This is rather a general technology question. I live in an apartment, and we have a buzzer that connect to each unit, it operates on the telephone line. So when you dial a buzzer number, the unit's telephon...
by johndough
Tue Jul 14, 2015 9:01 am
Forum: Troubleshooting
Topic: Noobs SD card is currupt and wont format
Replies: 7
Views: 984

Re: Noobs SD card is currupt and wont format

Hi

I use:- http://www.diskinternals.com/linux-reader/

Whis shows the partitions that are normally hidden from Windows.
LinuxReader.PNG
LinuxReader.PNG (56.02 KiB) Viewed 740 times
I am using XP but feel certain that 8.1 would be just as capable.
by johndough
Tue Jul 14, 2015 8:38 am
Forum: Other projects
Topic: Any electronics buffs? HDMI to VGA DIY!!??
Replies: 14
Views: 12291

Re: Any electronics buffs? HDMI to VGA DIY!!??

Hi

Maybe one of these is within budget to use, and perhaps one to open up and examine?

http://www.walmart.com/c/kp/hdmi-to-vga-video-adapter
by johndough
Tue Jul 14, 2015 8:21 am
Forum: openSUSE
Topic: openSuSE works on RPi2
Replies: 0
Views: 3555

openSuSE works on RPi2

Hi I have tried on and off to get openSuSE working on my Pi2. Yesterday I did. Using the Build 317.11 (it is now 317.12) https://en.opensuse.org/HCL:Raspberry_Pi2 http://download.opensuse.org/repositories/devel:/ARM:/Factory:/Contrib:/RaspberryPi2/images/openSUSE-Tumbleweed-ARM-JeOS-raspberrypi2.arm...
by johndough
Sat Jun 13, 2015 10:12 am
Forum: Automation, sensing and robotics
Topic: 60W load frying my relays
Replies: 20
Views: 2501

Re: 60W load frying my relays

Mortimer wrote:@johndough - Peltiers are not inductive are they? I wouldn't have though derating the relay contacts for a Peltier was necessary.
Hi

No, not at all.

However if you are switching/interrupting the power supply side, you could be encountering transients etc.
by johndough
Fri Jun 12, 2015 1:40 pm
Forum: openSUSE
Topic: Luckily I broke the boot sequence for opensuse
Replies: 4
Views: 3813

Re: Luckily I broke the boot sequence for opensuse

Joe Schmoe wrote:Does the Pi have UEFI?
Hi

Probably not, but it doesn't have vmx either, which is a virtual machine file.

So for now I have to go with what is bundled in the .raw.xz file that i expand onto the SD card.
by johndough
Fri Jun 12, 2015 1:37 pm
Forum: Automation, sensing and robotics
Topic: 60W load frying my relays
Replies: 20
Views: 2501

Re: 60W load frying my relays

Hi I have a RPi switching a few devices on and off via a relay board. This has been working happily for some time now however the most powerful device has a habit of eventually breaking whichever relay it is connected to. It is a 12V/5A peltier heat pump supplied by a 60W power supply (I know this ...
by johndough
Fri Jun 12, 2015 1:20 pm
Forum: openSUSE
Topic: Luckily I broke the boot sequence for opensuse
Replies: 4
Views: 3813

Luckily I broke the boot sequence for opensuse

Hi all Well hour after hour of fruitless pi-ing. Tried several versions and all give the following error on reboot Net: Net Initialization Skipped No ethernet found Hit any key to stop autoboot: 0 switch to partitions #0, OK mmc0 is current device Scanning mmc 0:1... Found U-boot script /boot.scr 11...
by johndough
Tue Jun 02, 2015 9:11 am
Forum: openSUSE
Topic: openSUSE for RPi2
Replies: 29
Views: 16739

Re: openSUSE for RPi2

Hi I can create the imge on an SD card. Installing the openSUSE Tumbleweed Image It gives me a login cursor. I can reboot and get a failure (listing below), or zypper in yast2 and lxde and xorg etc etc and still get the same failure. Tried a few workarounds, and am completely stumped. The temptation...
by johndough
Sat May 30, 2015 8:11 am
Forum: Advanced users
Topic: Raspberry Pi Dry Contact for Curtain Control
Replies: 19
Views: 4720

Re: Raspberry Pi Dry Contact for Curtain Control

andymac37 wrote:I'm sorry. I really appreciate the help, but the information I've shared is all the manufacturer has for me.
Hi

I would attempt to measure the voltage on the control lines, and expect it to be 12 V DC.

But without more info it is not possible to be certain.
by johndough
Fri May 29, 2015 12:16 pm
Forum: openSUSE
Topic: openSUSE for RPi2
Replies: 29
Views: 16739

Re: openSUSE for RPi2

Also do you know if tumbleweed will include packages for arm7?[/quote] Hi What/which img have you used? Tumbleweed does include armv7 packages, and perhaps you could add the repositories accordingly. http://download.opensuse.org/ports/armv7hl/distribution/ I have spent days and countless gigabytes o...
by johndough
Fri May 29, 2015 10:42 am
Forum: General discussion
Topic: Help!!! Where to buy kit for my 10 year old
Replies: 10
Views: 913

Re: Help!!!

Hi

My choice would be CPC Farnell.

But then I am already a UK customer.

http://cpc.farnell.com/raspberrypi

and the bit where it says "Everything you need to get started"

http://cpc.farnell.com/pi-ucreate

and then do your assessment.
by johndough
Tue May 26, 2015 10:30 am
Forum: Beginners
Topic: Reading mains status through GPIO
Replies: 13
Views: 1712

Re: Reading mains status through GPIO

Hi Just a thought, this may help... The idea is to connect a relay to each power supply, at it’s rated voltage (110v). Then take a supply of 3V3 from the Pi through each relay and with a resistor return it to the Pi if wanted, Connection 4. When the first power supply is in use the 3V3.(select a sui...
by johndough
Sat May 23, 2015 8:57 am
Forum: openSUSE
Topic: openSUSE for RPi2
Replies: 29
Views: 16739

Re: openSUSE for RPi2

Hi Went back to a small install. Typed in some commands and got some results... zypper ref (accept repositories and build file list) zypper in LXQT* (106 packages lower, case also works) zypper in xin* (28 packages, chose opt 1 to not break anything) zypper in Xorg* (168 packages, chose opt 1 to not...
by johndough
Tue May 19, 2015 8:20 am
Forum: openSUSE
Topic: openSUSE for RPi2
Replies: 29
Views: 16739

Re: openSUSE for RPi2

I found a version @ https://en.opensuse.org/HCL:Raspberry_Pi2 but I couldn't get the graphics working and couldn't get logged in without some serious hacking of /etc/shadow (to add a known password for root). Hi Spent many hours trying. There is a 175 meg img that boots to a CLI, zyppered in all so...
by johndough
Tue May 19, 2015 8:10 am
Forum: Automation, sensing and robotics
Topic: Relay activates, garage door doesn't
Replies: 8
Views: 1892

Re: Relay activates, garage door doesn't

Hi My opinion is the same. You don't have sufficient voltage / current to power the relays. They operate at 5volts. The Pi provides 3.3volts. You want a second and separate 5v supply just for the relay coils, and I cannot from the picture explain where this would connect. The Sainsmart board is in 3...
by johndough
Mon May 18, 2015 8:38 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Relay - Switching Earth
Replies: 2
Views: 568

Re: Relay - Switching Earth

Hey all, I am working on a project using my Pi to act as a thermostat to control my Gas Heater. I have all the software side working well, just have a question regarding the relay. My heater currently has a thermostat plugged in (aftermarket) which is just a remote controlled type device. The way i...
by johndough
Mon May 11, 2015 8:48 am
Forum: Automation, sensing and robotics
Topic: Home lights control - with manual control also
Replies: 13
Views: 19408

Re: Home lights control - with manual control also

I am wanting to do this same thing with my pool lighting. I want to be able to have a switch outside on a post that I can use to control the light outside and have relay to turn it on via a web app on my phone. My issue is finding a 2-way waterproof switch. Hi MK waterproof switches, available from...
by johndough
Sun May 10, 2015 12:22 pm
Forum: General discussion
Topic: Is the rpi a political joke?
Replies: 43
Views: 9828

Re: Is the rpi a political joke?

The BBC is horrifically anal about "political correctness" and "product placement" to the point of annoyance of the average viewer. Hi Dougie I am inclined to disagree in some small part, because... If you are a large US corporation, with your share listing on the NYSE or similar you get almost con...
by johndough
Thu Apr 30, 2015 9:02 am
Forum: Automation, sensing and robotics
Topic: Home lights control - with manual control also
Replies: 13
Views: 19408

Re: Home lights control - with manual control also

I'd agree with Dougie Lawson's suggestion but bear in mind that the Pi won't know the status of the light (so on and off are relative terms) unless you also add some kind of monitoring for that into the circuit. Hi Well what Dougie Lawson showed is accurate, and the kind of solution I have mentione...
by johndough
Sun Apr 26, 2015 11:00 am
Forum: Automation, sensing and robotics
Topic: Attendance Counter?
Replies: 3
Views: 870

Re: Attendance Counter?

Looking ways to build an attendance count that mark people/members walking through the door. Something like a finishing line. Mark the Date /Time + database. How and what should i need to start? Hi You could consider a pair of photo-electric beams, either side of the door frame. If only one person ...

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