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by exartemarte
Sun Jun 30, 2013 9:00 am
Forum: Advanced users
Topic: Is anything wrong with my voltage regulator circuit?
Replies: 7
Views: 3811

Re: Is anything wrong with my voltage regulator circuit?

This is what I use to power my Pi via the P1 ground and 5V pins. http://www.ebay.co.uk/itm/270740352010 Looks like an interesting little device. But why does it have three i/p and three o/p connectors? I would have expected two. They are designed to be plugged into servos or ESCs which require powe...
by exartemarte
Sun Jun 30, 2013 8:16 am
Forum: Advanced users
Topic: Is anything wrong with my voltage regulator circuit?
Replies: 7
Views: 3811

Re: Is anything wrong with my voltage regulator circuit?

joan wrote:This is what I use to power my Pi via the P1 ground and 5V pins.

http://www.ebay.co.uk/itm/270740352010
Looks like an interesting little device. But why does it have three i/p and three o/p connectors? I would have expected two.
by exartemarte
Thu May 16, 2013 12:56 pm
Forum: Media centres
Topic: get_iplayer rtmpdump does not support SWF Verif
Replies: 7
Views: 3240

Re: get_iplayer rtmpdump does not support SWF Verif

I tried it again, using the automated script from Mark Williams which is linked from Alex's page - same result. Just in case, I moved it from the R2 512MB Pi onto a R1 256MB one and did it all again. Same result. I have managed to download a radio programme, so it works to that extent, but TV progra...
by exartemarte
Thu May 16, 2013 9:22 am
Forum: Media centres
Topic: get_iplayer rtmpdump does not support SWF Verif
Replies: 7
Views: 3240

Re: get_iplayer rtmpdump does not support SWF Verif

I'm having the same problem as mister_t and Garz - the segmentation fault and the SWF verification failure. How exactly do you "update" rtmpdump? I installed it today from git, following Alex's instructions, so presumably it's the latest version. rtmpdump -v gives the same as mister_t got: V2.4 / se...
by exartemarte
Tue May 14, 2013 6:05 pm
Forum: Python
Topic: Learning Python with Nim
Replies: 3
Views: 2727

Learning Python with Nim

I love the Pi, but wasn't keen to learn Yet Another Programming Language so I've only recently got round to Python. I'm interested in control and robotics, but fancied a software-only project for an introduction to the language and I chose the game of Nim. I used to play Robot Nim on my Nascom 2 a l...
by exartemarte
Sat May 04, 2013 10:17 am
Forum: Automation, sensing and robotics
Topic: Bead sorters
Replies: 6
Views: 2335

Re: Bead sorters

Some time ago I did a draughts sorter, using a Picaxe controller. I'm planning an upgraded version using a Pi.
by exartemarte
Thu Mar 21, 2013 11:35 pm
Forum: Automation, sensing and robotics
Topic: Inexpensive Battery Power for Pi
Replies: 7
Views: 10538

Re: Inexpensive Battery Power for Pi

I personally wouldn't use Lipos for this and I certainly wouldn't recommend them for kids getting into robotics on the Pi....but I realize Lipos are the latest battery tech and they provide alot of power in a lightweight package. I would just rather give up a little weight and output and use a batt...
by exartemarte
Thu Mar 21, 2013 8:03 pm
Forum: Automation, sensing and robotics
Topic: Inexpensive Battery Power for Pi
Replies: 7
Views: 10538

Re: Inexpensive Battery Power for Pi

I run one of my RPis from a single LiPo cell (from an old Laptop battery pack) via a 3-4.5V to 5V switched supply that is about the same size as the 7805. I haven't timed it because I only run it for a few minutes at a time, but it seems to have lasted for over an hour on one charge so far :) Snap!...
by exartemarte
Thu Mar 21, 2013 1:15 pm
Forum: General discussion
Topic: wifi dongle
Replies: 8
Views: 4790

Re: wifi dongle

Can't help with Ubuntu, I'm afraid, but no doubt someone will. The Model A/wifi/Arduino combo is intended eventually for a mobile robot, where it will have to be battery powered. Oh, and belated thanks to simplesi and to Simon the Pi Man , whose tutorials I have linked in a post above, and whose wor...
by exartemarte
Thu Mar 21, 2013 12:31 pm
Forum: General discussion
Topic: wifi dongle
Replies: 8
Views: 4790

Re: wifi dongle

Congratulations! Now it's up and working, might I suggest a refinement or two? If you're using ssh, you might also want to install Samba . This gives you access to files on the Pi from your (Windows) PC/laptop: http://www.exartemarte.me.uk/picture_library/Samba.png When I'm programming on the Pi I u...
by exartemarte
Wed Mar 20, 2013 5:42 pm
Forum: General discussion
Topic: wifi dongle
Replies: 8
Views: 4790

Re: wifi dongle

Hello Do you use a wifi dongle with your RPi? What adaptors do you use? Is it recommended any one? (because the chip, for example= Thanks (Excuse my English) I'm using one of these , following a recommendation from someone else on the forums, and it's fine. I've had it about six weeks and it's used...
by exartemarte
Sun Mar 10, 2013 8:28 pm
Forum: HATs and other add-ons
Topic: SD card sticking out ? Use RSMMC
Replies: 56
Views: 33096

Re: SD card sticking out ? Use RSMMC

I had a customer exchange a (mechanically) broken SD slot with a new one I obtained for him on the Raspberry Pi, and it stopped booting from it - maybe something went wrong while soldering, maybe there are some timing problems ... But - no one is stopping you from trying! I have done a couple of th...
by exartemarte
Thu Feb 28, 2013 1:11 pm
Forum: General discussion
Topic: The "I am happy with my delivery & price" thread.
Replies: 19
Views: 3805

Re: The "I am happy with my delivery & price" thread.

Excellent service from Farnell (UK). I have bought three Pi's from them on different occasions. Two were delivered next day. One involved a wait, but that was made clear on the website and it arrived within the specified time. My card was not charged until the Pi was despatched. Just one point to wa...
by exartemarte
Tue Feb 19, 2013 5:59 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Driving 2 DC motors using L293D
Replies: 35
Views: 37056

Re: Driving 2 DC motors using L293D

Nice project. I would be interested to know how your camera link to the pc works.
by exartemarte
Sun Feb 10, 2013 12:52 pm
Forum: General discussion
Topic: SD Card
Replies: 9
Views: 1401

Re: SD Card

Just type the letters - they won't appear on the screen - then press ENTER.
by exartemarte
Wed Feb 06, 2013 12:57 am
Forum: General discussion
Topic: Raspberry Pi Model A now available !
Replies: 28
Views: 5678

Re: Raspberry Pi Model A now available !

I got mine today. I would have bought one even if there was no price differential, for the power saving. It's been running all afternoon and evening, in a case with a wi-fi dongle in the one USB port, and it's running cool where a model B doing the same thing was noticeably warm. For a small robotic...
by exartemarte
Fri Jan 25, 2013 12:13 am
Forum: HATs and other add-ons
Topic: Farnell assembled Gertboard
Replies: 47
Views: 10336

Re: Farnell assembled Gertboard

alexeames wrote:
exartemarte wrote:Someone's not been paying attention at the back. I'll throw the chalk next time :lol:
http://youtu.be/rNhXqjSO-0s
Please, sir, I was away that day ...
by exartemarte
Thu Jan 24, 2013 7:24 pm
Forum: HATs and other add-ons
Topic: Farnell assembled Gertboard
Replies: 47
Views: 10336

Re: Farnell assembled Gertboard

Rev 2 latest board has unpopulated 2pin header (reset) points on board near to power components. I soldered a 2pin female header to them and stuck a 2wire tactile button into the header. The button you see on the case is a corkboard (noticeboard) pin plastic head is cut down and the steel pin also ...
by exartemarte
Thu Jan 24, 2013 7:07 pm
Forum: HATs and other add-ons
Topic: Farnell assembled Gertboard
Replies: 47
Views: 10336

Re: Farnell assembled Gertboard

ianajo wrote:Case from
http://www.ebay.co.uk/sch/i.html?_trksi ... &_from=R40

Modified with tiny fan and reset button.
How did you connect up the reset button?

(I hope this isn't a stupid question - so far as I know there's no accessible reset connector.)
by exartemarte
Thu Jan 24, 2013 5:39 pm
Forum: HATs and other add-ons
Topic: Farnell assembled Gertboard
Replies: 47
Views: 10336

Re: Farnell assembled Gertboard

Rushy wrote:Where did you get that case from?
Looks like a good case, doesn't it? I don't know where ianajo's is from, but CPC have them.
by exartemarte
Wed Jan 16, 2013 2:51 pm
Forum: Troubleshooting
Topic: broken sd slot
Replies: 13
Views: 3722

Re: broken sd slot

I hope the credit card approach works for you - it didn't for me so I replaced the card holder. I've done two now - it's not all that difficult if you can solder - there are pictures and a description here.
by exartemarte
Wed Jan 16, 2013 2:41 pm
Forum: Beginners
Topic: Pi Uptime
Replies: 40
Views: 12165

Re: Pi Uptime

I have one providing network storage which runs 24/7 and has been in use for months - I can't even remember how many months, but I mentioned it in a post at the beginning of September so it's been in use at least that long. It's been taken down from time to time to do software updates, or add hardwa...
by exartemarte
Wed Jan 16, 2013 1:40 pm
Forum: Automation, sensing and robotics
Topic: a R2D2 robot powered by Pi
Replies: 4
Views: 3383

Re: a R2D2 robot powered by Pi

Excellent project - I love it!
by exartemarte
Sat Dec 15, 2012 12:14 pm
Forum: General discussion
Topic: Controlling 2 Motors
Replies: 6
Views: 1425

Re: Controlling 2 Motors

I'm no expert on these things, but I note from the spec that the winding resistance is just under 2 ohms. In a stall condition that's all there is opposing the flow of current, so if you are running it at the specified 12v you will have a stall current of about 6A, which is a bit heavy for an L298.
by exartemarte
Wed Dec 12, 2012 2:11 pm
Forum: Other projects
Topic: Pibow and Adafruit low-profile Micro SD adapter
Replies: 21
Views: 8895

Re: Pibow and Adafruit low-profile Micro SD adapter

Thank you. The first one looks like a useful device and it would have saved me the job of modifying a case, but it's bit pricey with postage to the UK - over £15.00 for a plastic adapter, which is more than three times the cost of the case.

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