Electrical Engineering - 2017-12-04

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11:41 AM

anyone getting the dave meter ?

11:53 AM

Nope

5 hours later…

Zeta.Investigator

5:15 PM

@PlasmaHH Why 4 AA are better than 1 9V? He sure says "rubbish" a lot ... lol

kickstarter.com/projects/eevblog/eevblog-121gw-multimeter

5:33 PM

@Zeta.Investigator More energy storage capacity. A 9 V battery is equivalent to 6 AAAA batteries in series and has pretty high internal resistance.

4

Q: Is there a battery with smaller cells inside of it?

I vaguely recall reading a place that a simple way to get small battery cells is to open a battery which contained 5-6 of these. I thought it was an AA battery, but I've been Googling, and have found that they don't seem to contain anything of the sort. So I'm wondering, am I just making up thing...

@Zeta.Investigator 9V batteries are expensive

6:23 PM

@W5VO Per Joule, yes. Absolute, no. If yours are expensive on a unit basis, you need better suppliers. :-P

1 hour later…

7:27 PM

Hello everyone

Zeta.Investigator

hello @DanielTork

Would anyone need the help of someone with my experience

For a project they are working on?

Maybe even something easy which takes too much time to complete

And of course I won't ask for anything in return

How are you doing @Zeta.Investigator?

Zeta.Investigator

@DanielTork fine. tnx

What are you up to?

Hopefully something that doesn't have anything to do with colds :)

Zeta.Investigator

@DanielTork lol! It went away by drinking hot milk

7:34 PM

Glad to hear that

Zeta.Investigator

@DanielTork Do you visit sites like hackaday.io?

There are lots of nice ideas there if you have time to do them

And you can join people's projects there

Well I do visit them when I search for something that interests me

You mean projects with enthusiast level?

Zeta.Investigator

@DanielTork There are projects from all kinds of levels...For example some british guy made a ROV and won the final prize!

Interesting

I'll give it a try

How about your projects?

Are you working on one right now?

Zeta.Investigator

@DanielTork I'm the n00b fella around these parts...Tinkering with arduinos and such...(recently TM4C123)

There are also LOTS of online courses available to do for those who have enough time...for example there are 3 online courses on embedded systems from UT Austin which I can vouch for (Taken the first 2 ones)

edx.org/course/…

@DanielTork Currently, I hope to set up ESP8266 with TM4C123 and maybe even set up a webserver to display the data

7:43 PM

Nice

Zeta.Investigator

But I've not any experience on web stuff yet

Well, if you're going to make a server

But-it depends on what you want it to do

You want to control something over wi-fi?

Zeta.Investigator

@DanielTork For the moment, I just want to passively plot some graphs (sensor data)...There maybe a quick-to-setup html5 library out there...but as I said, I've got 0 experience... I've actually already implemented a JavaFX client that works via SPP bluetooth and plots the data (and some analysis and whatnot)... I hope to do the same over net...like treat the packages as they come and sequentially plot them

Interesting

Zeta.Investigator

There is also a website which crawls over all online courses...These are on my watch:

2

class-central.com/search?q=tcp%2Fip

class-central.com/search?q=3d+printing

7:51 PM

Do you tinker only with digital platforms?

Do you usually play with more analogous stuff if you understand what

I mean?

Zeta.Investigator

@DanielTork If you mean only beginner MCU stuff, currently yes.

@Asmyldof I usually take advantage of the "free" AA/AAA battery offer from harbor freight

MCU stuff?Like?

Zeta.Investigator

@DanielTork For analog, I've heard Horowitz and Hill is a great book.

@DanielTork Like interfacing different ICs with TM4C123 or arduinos and messing with peripherals and such (in a n00b level)

@W5VO All batteries are just about free.

7:57 PM

Well analog circuitry is what I tinker with

Much less with micros

Can't remember what I paid for the last lot of 100 of everything from Varta, but it was definitely in the noise floor

@Asmyldof the only other thing that takes 9V batteries are my smoke detectors

@W5VO My only "normal" smoke detector is mains fed with internal supply system

Just like the cameras hooked up to the same wires

;-)

Mine is as well, but it has a battery backup

Yes. Which in my case is a double set of SLAs

8:01 PM

@Zeta.Investigator Maybe you could find it interesting too

Zeta.Investigator

@DanielTork I kinda have a theory that if someone wants to make money out of analog these days, he/she should focus on RF or precise instrumentations...Those areas are actually quite difficult...but I'm not at a position of guessing, so...

Enrgy engineering is also there for the taking

Yes, I agree they are difficult

Zeta.Investigator

@DanielTork Yeah, you mean power electronics?

Yep

Zeta.Investigator

Check this out if you like analog: youtube.com/watch?v=IVnL01hqszs

8:04 PM

Or renewable energy

@Zeta.Investigator Have you heard of Mehdi Sadaghdar?

Zeta.Investigator

@DanielTork Yep. He is iranian

He made it to trending of yt a few times

I watched all his videos

Zeta.Investigator

@DanielTork Watched a few also...his jokes are funny :)

And how he makes go boom

Things and trips over things, hits things

His humour earn the majority of the points

*earns

Zeta.Investigator

He once zapped his mustache!

8:12 PM

That was pretty sick

And not only

Have to wonder how he actually didn't hurt himself

2 hours later…

9:55 PM

3

Q: He couldn't hold his alcohol. Russian variants?

I was trying to explain to someone the English phrase: He couldn't hold his alcohol (also liquor) This means that one becomes drunk very easily. Are there any Russian idioms/expressions that are roughly equivalent?

There's hardly such expression in that language.

10:32 PM

@NickAlexeev Surely there should be. It's just that you guys start measuring such failures in bottles, rather than glasses... :-P

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