Electrical Engineering

coding_corgi

01:24

@MLM Yo!

AsheeshR

02:49

1

A: Community Promotion Ads - 2013

Anindo Ghosh

03:48

grEEtz

Phil Frost

hi.

Anindo Ghosh

@PhilFrost :-)

Phil Frost

@AnindoGhosh that noise scares me every time.

Anindo Ghosh

Disable it?

Phil Frost

I never think of it until I it startles me :)

angelatlarge

04:11

@AnindoGhosh Hallo

Anindo Ghosh

@angelatlarge :-)

angelatlarge

04:59

Mmmm... resistor porn. I haz it

The Photon

@angelatlarge Stop. This is an all-ages chat.

angelatlarge

yesterday, by The Photon

@AnindoGhosh There are subreddits so specific I won't mention them where coding-corgi and Camil might read about it.

@ThePhoton First you want to stop pubescent boys from an NSFW reddits, now resistor porn is off limits? What's next, opposable thumbs?

(I can't believe I just make an analogy between opposable thumbs and pr0n...)

The Photon

@angelatlarge If they can figure out a 555 timer circuit, they can probably figure out the internet for themselves...but on the other hand that probably wasn't my most tasteful comment ever on chat...

The Photon

05:27

@angelatlarge Here is the kind of fabulous stuff you find on Reddit:

technabob.com/blog/2011/11/25/…

MLM

alright this is really bugging me. I have a generic (dataWidthN : integer := 8) but when I simulate it says it is 1000

The Photon

@MLM In binary?

angelatlarge

@ThePhoton This is awesome!

MLM

@ThePhoton oh duh :/ - that would make sense

@angelatlarge just leave it

angelatlarge

@ThePhoton F-ing brilliant!

@MLM Leave what? I meant to comment on the pen&teller app, sorry if it sounded like it was about you.

MLM

05:33

@angelatlarge ye, i thought you sarcastically commented on my fail and I thought that you thought that I might get offended.

angelatlarge

@MLM Oh, wow, funny. Yeah, I hit the wrong thing to respond to, and then realized that it seemed apropo your issue. Seriously, I make more inane mistakes then most, so it isn't for me to call the kettle black.

@ThePhoton Oh, soooo goood!

The Photon

@angelatlarge Like road trip porn?

@angelatlarge I'd get it and play it, but I bet there's already a professional league in Korea.

angelatlarge

@ThePhoton I skipped around the video, I don't need much more than that.

The Photon

@angelatlarge Kindof reminds me of 1980's Flight Simulator

angelatlarge

05:48

@ThePhoton Yeah, it seems to have those CGA-like graphics

rawbrawb

@david-kessner Do you want to clean up the incandescent part? here. electronics.stackexchange.com/a/71239/11861 it is black body radiation not electronic transistions ...

The Photon

@angelatlarge First flight sim I saw was on my uncle's IBM PC...Hercules graphics, IIRC, no color. Just black and white (or green?) lines. You could take off from one airport. Look up the radio frequencies for the beacon at the next airport...trim your aerilons or whatever....520 kB worth of scenery to look at!

angelatlarge

@rawbrawb I could start on the silver @AnindoGhosh badge, just to return the favor....

@ThePhoton And then you could run a CGA emulator on your Hercules... Yeah, white was rare I think. It was green or amber.

The Photon

@angelatlarge But I think the actual IBM branded monitors had white? My uncle would have had actual IBM because he worked for them.

Green was just so "Apple ][".

angelatlarge

@rawbrawb Does replacing spaces with dashes work in usernames?

@ThePhoton So it was.

@ThePhoton Didn't know that.

The Photon

05:57

@angelatlarge I could also be totally wrong...

rawbrawb

@angelatlarge don't know, just copied from the bottom of the screen when the cursor is over the screen name.

angelatlarge

@ThePhoton Maybe your memories are white-shifted (white-washed) since they are receding?

rawbrawb

@angelatlarge not sure what you're saying here, but spelling is one thing but getting the physics dead wrong is quite another.

The Photon

@angelatlarge Google images for "IBM 5153" shows some with white, some with green.

angelatlarge

@rawbrawb Even in a name of a joke?

rawbrawb

06:02

@angelatlarge not getting it, but then maybe my Physicist brain is kicking in.

angelatlarge

@rawbrawb Don't worry, you didn't miss much.

The Photon

Sayonara guys.

angelatlarge

@ThePhoton Yeah, I gotta go to bed too. Bye

MLM

@ThePhoton night, thanks for the quick catch

jippie

@angelatlarge Guess why we have Philips.

good morning

jippie

06:36

@ThePhoton That is the type of game a microcontroller would easily be able to play while I go to work myself.

user61389

07:16

Good morning

jippie

hey neighbor

William 'MindWorX' Mariager

Is there a way to determine what kind of communication goes on between two devices? Like I2C, Serial, CAN, etc.?

I'm trying to reverse engineer an RC module. It has six connections. Two are ground, two are +5v, and the last two are comm.

jippie

a logic analyzer

@William'MindWorX'Mariager you basically want something that eavesdrops on the lines and translates it to 'readable' text.

William 'MindWorX' Mariager

I tried reading the signal using the serial Rx line on my Arduino. At the right baudrate I could distinguish high from low though I got it as a byte with the value 0 or 255.

I guess a two-channel digital oscilloscope could be handy for this.

jippie

07:38

@William'MindWorX'Mariager of course you would have to set up Arduino for the matching protocol.

@William'MindWorX'Mariager a scope implies a lot of manual labour counting and measuring the pulses. Some more expensive scopes will do it for you though.

William 'MindWorX' Mariager

Well, I figured a scope could bring me a little closer at least in terms of what rate I'm working at. And if one line just looks like clock signal one could assume it's I2C.

jippie

@William'MindWorX'Mariager or SPI

abdullah kahraman

08:00

Good morning!

@William'MindWorX'Mariager Oh, you again? Didn't you change your username, yet? :)

William 'MindWorX' Mariager

10:49

@abdullahkahraman Harh. :P

yogece

13:49

hi all

abdullah kahraman

14:11

@yogece Hi, I see you managed to change your avatar. How did you do that?

yogece

@abdullahkahraman tanks to you.because of my rep i could do it

abdullah kahraman

@yogece Your welcome

~~..................^^^~~

yogece

@abdullahkahraman did u join todays hangout

abdullah kahraman

@yogece I don't think there was a hangout

yogece

14:29

@abdullahkahraman are you interested analog ele

abdullah kahraman

@yogece Yes, I love analog electronics

yogece

@abdullahkahraman name few best analog designers

abdullah kahraman

@yogece I can go to Wikipedia, you know?

Bob Willard

Bob Pease

Jim Williams

yogece

@abdullahkahraman have u read them? bob widlar

abdullah kahraman

@yogece Yeah, Widlar :)

@yogece No, I read some of Bob Pease's articles and Jim Williams' app notes

yogece

14:34

@abdullahkahraman have a look at www.introni.it/pdf/Bob%20Pease%20Lab%20Notes%20Part%208.pdf‎

abdullah kahraman

@yogece Thanks

yogece

@abdullahkahraman u have any use ful resource for analog

@abdullahkahraman u have IEEE

abdullah kahraman

@yogece No, unfortunately, I don't have IEEE membership.

yogece

@abdullahkahraman what all your interests

abdullah kahraman

@yogece I like everything in electronics except from RF, which is a black magic to me.

yogece

14:46

@abdullahkahraman nice

@AsheeshR welcome

AsheeshR

@yogece Hello.

yogece

@AsheeshR do u play with electronics?

AsheeshR

@yogece From time to time.

yogece

@PythonInProgress you are RPi guy

PythonInProgress

yeh

why do you ask?

@yogece i love my Raspi :P

yogece

14:59

@PythonInProgress i have a confusion whether to buy RPi or beaglebone black

PythonInProgress

RPi. done

yogece

@PythonInProgress thanks

PythonInProgress

@yogece np. the raspi is awesome. if you optomize it a bit, you can even watch youtube at 1080p, better than my laptop

i run raspbian

yogece

@PythonInProgress how ubuntu works in RPi

PythonInProgress

@yogece ? it should work fine

yogece

15:02

@PythonInProgress have used?

PythonInProgress

nope

just debian and raspbian.

abdullah kahraman

@yogece I think BeagleBone Black is also worth looking.

PythonInProgress

@yogece a friend of mine says it works fine though

@abdullahkahraman i prefer the RPi

abdullah kahraman

@PythonInProgress I thought it would be a little slow?

@PythonInProgress I have a Raspberry Pi, too :)

yogece

@PythonInProgress sorry about silly ques what diff betwen ubuntu & debian

PythonInProgress

15:04

idk, ill talk to him

@yogece just a different op system

@abdullahkahraman Cool :D

abdullah kahraman

@yogece Ubuntu, is a Debian based linux distribution.

PythonInProgress

so is raspbian

:P

yogece

@abdullahkahraman well u have rpi & black

abdullah kahraman

@yogece I don't have Beaglebone Black

PythonInProgress

bye guis! gotta go

yogece

15:06

what about application compatibility?

abdullah kahraman

@PythonInProgress Bye!

@yogece I think Beaglebone Black is better than Raspberry Pi in terms of performance.

@yogece Check this out: roboteurs.com/beaglebone-black-vs-raspberry-pi

yogece

15:38

hi

The Photon

@jippie, you gonna finish that answer?

jippie

@ThePhoton what is the name for verkortingsfactor in english

The Photon

@jippie You mean, that the wavelength is shorter in dielectric than in vacuum?

jippie

@ThePhoton yes I will, but I need a missing thingy

@ThePhoton yes

The Photon

dielectric constant or index of refraction (for optics).

dielectric constant might be square root of verkortingsfaktor or something.

jippie

15:45

yes rule of thumb 0.7 or 0.8

grmbl

@ThePhoton oh go write yourself a winning aswer while I grab a book from the shelf

The Photon

@jippie We also talk about relative velocity for coaxial cables, usually as a percentage (70 or 80%, like you say).

jippie

oh that would do

@ThePhoton can I use that?

The Photon

@jippie Yeah, I'm waiting for your answer and I might just have a couple things to add to it.

jippie

does it have a common letter assigned?

Well I'm not planning to go much further than the rules of thumb anyway. :o)

The Photon

Apparently velocity factor is a word too: en.wikipedia.org/wiki/Wave_propagation_speed

jippie

15:49

@ThePhoton yeah that sounds familiar :o)

there you go, thanks for speeding up the Googling :o)

strange that my little electronics compendium doesn't mention 'lange leidingen' and 'verkortingsfactor'. Curious how they do call it ... checking right now.

Anindo Ghosh

@ThePhoton "Velocity Factor" is not a word. It's two. :-)

The Photon

@jippie My usual method to translate technical terms is to go to Wikipedia, and then see what the article on that term is called in the other language.

jippie

@ThePhoton mine too, but I could find it as quickly as I expected.

The Photon

16:09

@jippie, one thing, the OP was asking about traces on a board, not coaxial lines...so he needs to get his velocity factor from either sqrt(L*C) (with the L and C numbers coming from a simulator or approximation formula based on the trace geometry, or just use 1/sqrt(D_k), with D_k taken very roughly as an average between the board material (4.7ish for FR4) and air (assuming a top layer trace).

jippie

true

@ThePhoton so what kind of value will he find? 0.7'ish?

The Photon

High end EDA tools (Altium, ...) all have these calculations built in to their rules engines nowadays too.

jippie

I really don't have experience with PCB and track impedance, but when I was doing TDR measurements, I was never very far off with 0.7 or 0.8.

angelatlarge

Did I mis the hangout?

The Photon

@jippie Could be as low as 0.5 for a buried track. (completely surrounded by dielectric at D_k = 4.7)

jippie

16:12

hmm.. OK

@ThePhoton Anyways, that is how I use a rule of thumb, when the margin gets too close, I pull out the real formula's. Maybe I should mention that.

The Photon

westerndigs.blogspot.com/2013/05/…

jippie

@ThePhoton we used to own one of those when I was a kid :o)

Anindo Ghosh

@angelatlarge hangout did not happen

The Photon

@jippie I have one still...Used to keep it in my office, but my new job is a little more buttoned-down.

angelatlarge

@AnindoGhosh Is that because the weather in OK finally got @Kortuk?

jippie

16:27

good morning @AnindoGhosh

Anindo Ghosh

@angelatlarge I guess he's got real life taking up his time. However, I think we're all doing something wrong: Any one of us with reasonably high bandwidth and reasonably low latency can set up the hang-out, and share the link here.

@jippie Hiya!

user61389

@abdullahkahraman what's this? :P chat.stackexchange.com/messages/9702628/history

angelatlarge

@jippie And the rest of us? Chopped liver?

jippie

@AnindoGhosh and noone else bothers to set it up ... where will this chat go without @kortuk?

Anindo Ghosh

@jippie Like I said, we suck.

@angelatlarge Lightly fried, with browned onion rings.

jippie

16:31

@angelatlarge yeas, you too I guess .. :-p

angelatlarge

@AnindoGhosh Apparently.

Anindo Ghosh

@angelatlarge Yummy.

angelatlarge

@AnindoGhosh Ugh

@AnindoGhosh I think I've become to americanized: I don't eat entrails.

Anindo Ghosh

@angelatlarge Don't underestimate the power of onion rings.

@angelatlarge You need to travel the world. Incidentally, liver does not fall under "entrails", intestines do. If you eat sausages, there is a fair chance you do eat entrails: Sausage skin is often just that.

angelatlarge

@AnindoGhosh That's true. At least the good ones.

Anindo Ghosh

16:34

@angelatlarge I can't believe I'm discussing culinary raw materials here. Wrong chat, wrong chat.

angelatlarge

@AnindoGhosh I've spent quite a bit of time in rural mexico, where all sorts of things that we (usually) feed our dogs are eaten by humans. I admire that, but do not join in the fun.

@AnindoGhosh I guess we should stop before someone kicks us out.

@AnindoGhosh Though, again, I am not sure I consider liver "culinary"....

jippie

@AnindoGhosh yup

/me likes liver

Anindo Ghosh

@angelatlarge Liver mince (mutton is preferred) is not reject meat: It's rich in iron, many vitamins, protein, and tastes amazing if grilled or sautéed.

angelatlarge

@AnindoGhosh That's what some people say of rats, caterpillars, and civet coffee too.

user61389

Hey. Stop.

Anindo Ghosh

16:37

@angelatlarge Have you heard of leberwurst? Truly delicious.

angelatlarge

@CamilStaps Who is that for and why?

Anindo Ghosh

@angelatlarge Now, if I were speaking of haggis, I would understand the reluctance.

@angelatlarge He's a growing child, he gets hungry when we talk of food.

user61389

@angelatlarge all of you talking about food! Just kidding, carry on

angelatlarge

@AnindoGhosh +1!

@CamilStaps No, we are not talking about food. We are talking about certain stuff that some people eat. Not food.

user61389

@angelatlarge lol :)

angelatlarge

16:40

@AnindoGhosh One man's haggis is another man's delicious leverwurst

user61389

@AnindoGhosh I'm not growing anymore

Anindo Ghosh

@angelatlarge It's either leberwurst, liverwurst, or liver sausage.

@CamilStaps I'm not going there.

user61389

@AnindoGhosh good idea :)

Anindo Ghosh

@angelatlarge To be honest, my only real objection to haggis is the appearance.

angelatlarge

@AnindoGhosh Never had the honor of meeting him live

@AnindoGhosh (The implied Alice in Wonderland reference need not be made explicit there)

@AnindoGhosh (Except in my comment)

Anindo Ghosh

16:44

@angelatlarge Hahahahahaha always with the exceptions,

angelatlarge

@AnindoGhosh Because I am special...

@AnindoGhosh ...just like everyone else

abdullah kahraman

@CamilStaps So your now interested in chat edits, too?

~~.............................^^^~~

user61389

@abdullahkahraman I'm looking for something new, I almost have the Copy Editor badge

jippie

@abdullahkahraman yeah let's do ascii art :o)

abdullah kahraman

Nobody noticed no grammer mistakes?

Wow, wonder when we are going to reach 1000 starred messages! Look at those stars! Your great guys!

The Photon

16:52

@AnindoGhosh Offal

user61389

@abdullahkahraman I remember that there was a line "do you correct grammar mistakes?" in the geek test..

Anindo Ghosh

@ThePhoton What about it?

The Photon

@AnindoGhosh Liver is not entrails, but it is offal (cc @angelatlarge).

Anindo Ghosh

abdullah kahraman

@CamilStaps Quick, start my previous message so that every geek will see that "your" and will try to edit it out!

Anindo Ghosh

16:53

@angelatlarge That's "lever wurst"

@ThePhoton True.

user61389

@abdullahkahraman start?

abdullah kahraman

@CamilStaps You know I meant star. Your mean

The Photon

@AnindoGhosh I thought it was a giant hot dog on top of the pyramid of Giza.

angelatlarge

@AnindoGhosh Groan! No, that's lever WORST (as in the most bad).

user61389

@abdullahkahraman you were fishing, so I bited

Anindo Ghosh

16:54

@ThePhoton It's sausage used as a lever, so you're close.

abdullah kahraman

@ThePhoton I thought the same, lol

angelatlarge

@CamilStaps Given that you are not a native English speaker, @AnindoGhosh will probably correct that.

Anindo Ghosh

@angelatlarge No, I'm trying to ration out my corrections.

jippie

@AnindoGhosh what has the sausage have to do with it?

angelatlarge

@AnindoGhosh What's your limit?

abdullah kahraman

16:55

@AnindoGhosh I am now trying to calculate the center of gravity of the sausage and why the right side is down

Anindo Ghosh

@jippie "Wurst" = sausage in German.

@angelatlarge 1 and a half Bacardi Breezers.

user61389

@angelatlarge sssh, I'm doing an undercover geek test on the users here

angelatlarge

►

jippie

@AnindoGhosh Having to write German is my wurst fear

4

Anindo Ghosh

@abdullahkahraman Look carefully, the fulcrum is to the left of center of the sausage. Even visual puns deserve their share of proper engineering.

@jippie +1

abdullah kahraman

16:57

@AnindoGhosh Oh, yeah

angelatlarge

@AnindoGhosh Personally, I thought it was a large band aid, with the arrow indicating where the incision was made.

@AnindoGhosh I already made that joke. That goes into the the "recycling material that's too recent" file.

abdullah kahraman

@angelatlarge That is a bad band aid then, with no holes for the wound to breath.

Anindo Ghosh

@angelatlarge It's an illustration, not a full 3-D model. I could do that instead, I'm pretty slick with a few 3-D CAD tools.

@abdullahkahraman breathe

angelatlarge

@AnindoGhosh Take that man's breezer away!

@AnindoGhosh You correct breath->breathe, but not bited->bit???

abdullah kahraman

@AnindoGhosh Yeah, yeah, where were you in my other dozen of messages? Guess this one is more realistic, ha?

Anindo Ghosh

16:59

@angelatlarge Government rations.

jippie

@AnindoGhosh We'll wait for the update image a couple minutes

Anindo Ghosh

@abdullahkahraman I prefer to have to do one correction per message tops. Don't want to overextend myself.

angelatlarge

@AnindoGhosh Are you like the US Gummit with the immigration quota: there are corrections/region/country limit, and you already reached the European max?

abdullah kahraman

@AnindoGhosh You have to keep yourself in control.

Anindo Ghosh

@jippie Won't. Not this time. Next time I sketch up a visual pun, I'll make it in Inventor.

jippie

17:01

tssssk

user61389

0

Q: How to program a BeagleBone board?

Until now I used Microchip PIC, to program this microprocessor there is MPLAB. I would like to make a step forward and learn about other microcontrollers. I found the BeagleBone Black quiet promising for my DIY project because there is a 2GB flash and 1GHz clock. I have a few question as a begin...

user61389

He's using PIC and wants a step forward?? How's that supposed to work?

jippie

@CamilStaps yeah, I thought he wanted hands on AVR

abdullah kahraman

17:19

@CamilStaps People can have dreams..

angelatlarge

The head groan boy is in da house!

Anindo Ghosh

17:46

@angelatlarge "boy"?

angelatlarge

@AnindoGhosh Sure.

@AnindoGhosh Pretty sure he's not a girl...

abdullah kahraman

18:01

@angelatlarge In modern Turkish, we also use "boy" unless, he is 30+. But in this case, this sounds a little weird..

jippie

18:31

?

good morning

angelatlarge

@jippie Is it morning already?

jippie

@AnindoGhosh at least we are good at something!

@angelatlarge bound to be somewhere in the world

abdullah kahraman

Good evening!

Bye!

angelatlarge

@abdullahkahraman Bye!

jippie

18:48

so what is todays subject in chat?

Kortuk

19:15

So, more tornadoes, just finishing dealing with them.

angelatlarge

@Kortuk Everything OK with you and yours?

Kortuk

@angelatlarge Yeah, we are all fine, just annoyances.

angelatlarge

@Kortuk Good. You said you live and work in a bunker, but it's good to hear anyway.

Kortuk

@angelatlarge 20 feet of high density concrete. :)

angelatlarge

@Kortuk I thought NORAD was in Colorado...

jippie

19:23

@Kortuk your family doesn't live there, do they?

/me worries too much

Kortuk

@jippie in-laws are semi near by, but not that close. Everyone is fine

I now have to work, sorry guys, later.

The Photon

@jippie I'll take "Stuff that has nothing to do with electronics" for 500, please, Alex.

jippie

?

o.

@ThePhoton oh. we have a comedian in chat today. Funny

angelatlarge

@ThePhoton Nice!

The Photon

Ad on Facebook: "Need a Loan to Payoff Debt? "

That's not really how it works.

angelatlarge

19:36

@ThePhoton Although, how's that different from any other day? The chat subject breakdown, as far as I am concerned: beer: 5%, fixing someone's "How do I program avr with an Arduino?" problem: 20%, @AnindoGhosh's photography: 17%, languages: 8.5%, corrections: 22%, hellos/good-byes: 10%, stuff I don't understand: 17.5%

coding_corgi

Yo yo yo!

@ThePhoton Ha ha ha!

The Photon

@angelatlarge Yes, that's how I knew that topic would be on the board.

angelatlarge

I forgot: making blackheart jokes: 6.66%. Will need to rescale the percentages though...

Anindo Ghosh

@angelatlarge This is where a spreadsheet would have come in handy.

angelatlarge

@AnindoGhosh I don't really feel like retyping the whole list...

Anindo Ghosh

19:40

@angelatlarge :-)

coding_corgi

@angelatlarge YES! I get 20%!

@angelatlarge What about copying and pasting, now that I think about it it is hard to reach from Ctrl to C, and then again from Ctrl to V!

Phil Frost

I get the feeling there aren't too many RF engineers here

angelatlarge

@coding_corgi Yes, you and yodece(?) I think.

@PhilFrost Off topic! Off topic! :)

coding_corgi

@PhilFrost No, I haven't seen that much... We have lot's of of topic EE conversations though! ;]

@angelatlarge Naah... 'yogece' took 0.2%... He doesn't live in a haunted house...

The Photon

@PhilFrost Most of my work is about keeping things from radiating.

Phil Frost

19:46

you should hire me, because i'm apparently good at making antennas that do not radiate.

coding_corgi

@PhilFrost Hmmm....

The Photon

@PhilFrost Yes. Sounds like you should change your specialty from "rf" to "signal integrity"

coding_corgi

Ok, stupid question, how exactly does eBay work, I am afraid from buying from eBay...

Anindo Ghosh

@coding_corgi I'm an eBay regular. What help do you need?

@coding_corgi Pretty much half my components and equipment are eBay purchases.

coding_corgi

@AnindoGhosh I am afraid from buying from eBay... How does the system of ordering stuff work?

Phil Frost

19:50

@coding_corgi you send them money, and they send you questionable goods from china.

Anindo Ghosh

@coding_corgi Hmm, if you want to take notes...

coding_corgi

@PhilFrost Oooh! %[

@AnindoGhosh Naah...

The Photon

Let's play "Is this Tony?"

Joey

81 2

microcontroller nxp pcb pid-controller relay soldering solid-state-relay

coding_corgi

@ThePhoton who is Tony?

Phil Frost

so, if i take a non-resonant small loop, then make it resonate, does the radiation pattern change? Is it now a folded dipole?

The Photon

19:52

@coding_corgi A user who is banned.

angelatlarge

@ThePhoton Yeah, I was thinking that.

coding_corgi

@ThePhoton How is a user banned?

angelatlarge

And speaking of Tony, here's @Kortuk!

The Photon

@coding_corgi by the mods

coding_corgi

@ThePhoton Please the gods!

angelatlarge

19:54

9

Q: Many new user accounts+answers+suspensions and protected questions

I apologize if thise has been discussed before, but I didn't see anything. There has been a rash of new user acounts answering questions, and an equal (rush) to protect them 2.1 sound system noise user22024 Bus vs. seperate return paths for 3 phase bridge? user22023 High to low impedance micr...

discussion moderation answers new-users

The Photon

@PhilFrost From first principles I'd say no, the shape of the antenna should determine the radiation pattern...Adding lumped elements to make it resonant should just change how much power gets coupled in/out.

angelatlarge

@coding_corgi See also meta.electronics.stackexchange.com/questions/2933/…

The Photon

Of course for a more complex antenna like a Yagi if you could change how much current flows on the different elements, you could change the pattern.

Kortuk

@angelatlarge :)

coding_corgi

@AnindoGhosh Still writing an eBay tutorial?

Anindo Ghosh

19:56

1. Never buy anything so expensive or important you would be devastated if you got ripped off.
2. If it seems too good to be true, you're right.
3. If it's something not critical you want, then look at both bid and buy-now items. If it's critical, select the "Buy it Now" checkbox on the left before searching.
4. For stuff like components, I always select the "Free shipping" checkbox as well - many sellers will sell stuff apparently dirt cheap, but the shipping is where they are making their money.

coding_corgi

@AnindoGhosh Thanks... I'll stick to a safer side... Here I come amazon!

Anindo Ghosh

@coding_corgi I could tell you a lot more if you have specific questions.

The Photon

@AnindoGhosh How should a new user deal with sellers who won't sell to you if you don't already have feedback?

angelatlarge

@AnindoGhosh I don't think rule 4 is good for the US: more often than not you get cheaper prices if you pay for shipping. I usually just sort on price+shipping.

Anindo Ghosh

@coding_corgi Not sure where you're getting that Amazon is safe, or that eBay isn't? I've had way better success with refunds on eBay than on Amazon, the few times I needed it.

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