[QUOTE=DrDevil;43558028]Keep in mind that those meanwell PSUs have exposed mains on the back (the screw terminal), so if you use it, you should put it in a case or atleast wrap the rear end in tape or something like that.[/QUOTE]
Yeah, it's going to be tucked away inside the enclosure for the whole LED grid. Was planning on taking a regular power cable, cutting off the female end, running it through a hole in the enclosure where the 3 separate cables would be cut and stripped just enough for the terminal.
[editline]16th January 2014[/editline]
On second thought it may be better to buy a IEC C13 socket that gets screwed onto the side of the enclosure and have 3 cables run from the back of that to the power supply...
If you need a secure connection, I'd recommend Neutrik's "Powercon" connector, Locking power connector - the panel cut out is just a circle too so you can drill it out easy on your enclosure.
I use them on all of my rackmounted audio kit.
God damn cat decided to take a piss on the pile of my oscilliscope probes, below them was my computer PSU and my 2 new aglient powersupplys...
they all had to get scrapped, but the agilents will be wiped over and kept away until the smell goes away (its mainly over the case and back connectors, but it will go away.. eventually...
time to buy some new probes... Dammit
EDIT:
just spent 34.48 USD on new probes, time to wait... 2.5 weeks for them to come from china....
Thankfully i havent brought a current probe or a differential probe, they would likely have been there too, then i would be ordering another $2000 + :/
This is that moment where animal abuse is allowed as you kick that fucker harder than a soccer ball across the yard.
[QUOTE=pentium;43578062]This is that moment where animal abuse is allowed as you kick that fucker harder than a soccer ball across the yard.[/QUOTE]
Or you make a note to not leave valuable equipment where animals can fuck with them...
[QUOTE=Zero-Point;43578341]Or you make a note to not leave valuable equipment where animals can fuck with them...[/QUOTE]
literally
make a cat defense system to scare your cat from your workplace if you got a seperate room for your stuff.
the stuff was in the living room as i was doing some work there, the cats had not been let out and hence decided to go to the toilet... just... there
[QUOTE=scratch (nl);43563008]The new Arduino looks interesting to say the least. The shape of it is strange, for example the unused area around the outside of the double row pins
[t]http://arduino.cc/en/uploads/Main/ArduinoTre_LandingPage.jpg[/t]
[url]http://arduino.cc/en/Main/ArduinoBoardTre[/url]
[sp]Maybe it's so big because it comes from the U.S. [/sp]
[editline]17th January 2014[/editline]
I'm not sure but is it going to be some kind of competitor to the raspberry Pi?[/QUOTE]
That looks really cool to be fair.
Linux on a reasonable processor for OpenCV + GPS control + lots of data processing etc.
And then put real-time stuff on the AVR, where there's no timing jitter from the OS. You could make a brilliant balancing robot.
Not to mention being able to reprogram the AVR on the go, possibly needing a few jumpers but oh well. Then it's got micro SD support, the USB will be dead useful too. Interested to see the price, will probably wait for a rev 2 though because that layout does look a bit odd.
One silly thing which I dislike about most arduino boards is how some of the screw holes are so close to something, I.E. female headers, that you can't fit a bolt or screw in it. The same for other small components as well (but it makes a bit more sense for those as it's to keep the size down)
[QUOTE=scratch (nl);43582007](but it makes a bit more sense for those as it's to keep the size down)[/QUOTE]
Strange to cut corners like that though when there's so much wasted space on the board. I wonder whether the extra space at the edge is actually for routing? It looks like the central part of the board keeps to the Arduino footprint, so they may well have used a 2 layer board and routed some signals from the ARM chip round the edges or something. Question would then be why they wouldn't be using a 4+ layer board :v:
[editline]blah[/editline]
Also, is it me or are there vastly more pins in the headers than there are listed IOs?
[QUOTE=r0b0tsquid;43582780]Strange to cut corners like that though when there's so much wasted space on the board. I wonder whether the extra space at the edge is actually for routing? It looks like the central part of the board keeps to the Arduino footprint, so they may well have used a 2 layer board and routed some signals from the ARM chip round the edges or something. Question would then be why they wouldn't be using a 4+ layer board :v:
[editline]blah[/editline]
Also, is it me or are there vastly more pins in the headers than there are listed IOs?[/QUOTE]
yeah the stats seem all off, maybe they didn't fill them in yet, or the arduino side of things on the tre only has very few pins for some reason.
[QUOTE=scratch (nl);43582007]One silly thing which I dislike about most arduino boards is how some of the screw holes are so close to something, I.E. female headers, that you can't fit a bolt or screw in it. The same for other small components as well (but it makes a bit more sense for those as it's to keep the size down)[/QUOTE]
And don't forget the non standard spacing on one of the headers, grr.
Does anyone have any experiance with embedded computers... its somthing im rather interested in suddenly... anyone know much about it?
[QUOTE=ddrl46;43585419][media]http://www.youtube.com/watch?v=ync-vQg8giQ[/media]
Woop.[/QUOTE]
Very nice, i must say!
[QUOTE=nuttyboffin;43584748]Does anyone have any experiance with embedded computers... its somthing im rather interested in suddenly... anyone know much about it?[/QUOTE]
Raspberry Pi and Beagleboard have huge communities, and are fairly cheap.
[QUOTE=DrDevil;43586509]Raspberry Pi and Beagleboard have huge communities, and are fairly cheap.[/QUOTE]
True, i was looking for some in-depth info on actually building embedded micro-computer circuits into projects, like home automation. Instead of using other people's designs, building a whole pcb with a micro-computer built into it.
[QUOTE=nuttyboffin;43587006]True, i was looking for some in-depth info on actually building embedded micro-computer circuits into projects, like home automation. Instead of using other people's designs, building a whole pcb with a micro-computer built into it.[/QUOTE]
Good luck, that shit isn't trivial at all. You'll need a lot of knowledge with PCB design to pull off a succesful board.
[QUOTE=LoneWolf_Recon;43418821]Here are some great (free) ebooks on Embedded Systems design.
[URL="http://electronicsforu.com/electronicsforu/circuitarchives/view_article.asp?sno=1628&title+=+10+Free+eBooks+On+Embedded+Systems%21&b_type=new&id=12571"]10 Free eBooks On Embedded Systems[/URL][/QUOTE]
My post may be of some use.
Finally got a shelf!
[t]http://i.imgur.com/8GZuJBw.jpg[/t]
[QUOTE=LoneWolf_Recon;43588077]My post may be of some use.[/QUOTE]
Thanks mate :)
So I got this "robot" I've been working on...working. For the biggest part that is.
(Sorry for the crappy quality)
[vid]https://dl.dropboxusercontent.com/u/43645231/photos/electro/2014-01-19%2020.03.12.webmhd.webm[/vid]
The only issue now is weight balancing. All the batteries and shit are on one side, causing that wheel to have much more grip than the other one, the result is it not going straight when it should.
I also had strange issues with one servo being much slower than the other, but after switching the 2 around they both work at the same speed, with the only change being that it now drives backwards :v:
[QUOTE=DrDevil;43587881]Good luck, that shit isn't trivial at all. You'll need a lot of knowledge with PCB design to pull off a succesful board.[/QUOTE]
Depends how far you want to go really, using a modern SoC like an ARM Cortex A8 requires careful (read: expensive) design and dealing with shit BGA packages, older chips
like the NEC V33 are relatively easy to implement in comparison yet still offers enough power for various applications.
so I ordered two of these solar panels [url]http://www.seeedstudio.com/wiki/index.php?title=0.5w_Solar_Panel_55*70[/url]
but how can I be sure they will be enough to power my arduino? Should I buy more? the store I buy from has free shipping today (so lasting like 3 more hours), so if I know quickly enough I can just order them right away.
[editline]20th January 2014[/editline]
peak power of a single panel is 100mA, and IO pins output max 40mA. I think I'll need more than 2 as they obviously won't output that much most of the time.
[QUOTE=scratch (nl);43608077]so I ordered two of these solar panels [url]http://www.seeedstudio.com/wiki/index.php?title=0.5w_Solar_Panel_55*70[/url]
but how can I be sure they will be enough to power my arduino? Should I buy more? the store I buy from has free shipping today (so lasting like 3 more hours), so if I know quickly enough I can just order them right away.
[editline]20th January 2014[/editline]
peak power of a single panel is 100mA, and IO pins output max 40mA. I think I'll need more than 2 as they obviously won't output that much most of the time.[/QUOTE]
You'll probably want 3-4 actually, because those numbers are based on the solar panel being in full sunlight, pointed directly at the sun, so the output could be considerably less if they're not angled properly. That is unless you're planning a mechanism to automatically track the sun.
Also maximum power point tracking yadda yadda
What do you think is better to use?
[url=http://www.radiomuseum.org/r/eico_vtvm_221.html]Eico 221[/url] (no recent recalibration but the tubes are good)
Or
[url=http://www.radiomuseum.org/r/heath_digital_multimeter_im_120.html]Heathkit IM-1202[/url] (one tube has [url=http://i11.photobucket.com/albums/a166/ballsandy/100_2272.jpg]getter spray[/url] and ZM1000's aren't cheap)
I need a multimeter to keep on the bench.
Why dont you get something thats not a fucking museum peice, for probably way less the price
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