Electrical Engineering

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Nick Alexeev

12:20 AM

@Funkyguy Good evening. It's been alright.

Hey, you were thinking about taking a power electronics class on Coursera this fall. Did you end up taking it?

Ricardo

12:36 AM

Hi folks. Anyone out there?

I'm just looking for someone who could answer this question of mine? Or maybe mention whether there's anything wrong with the question itself. The question is this: electronics.stackexchange.com/questions/134894/…

Nick Alexeev

@Ricardo Nick's there.

Ricardo

By the way, how does one cite a question nicely formatted in the chat here?

hey @Nick

Nick Alexeev

@Ricardo Simply post a link to the question and nothing else. Like so:

Q: AVR SPI slower than expected

I'm running an ATMega88A at 8MHz and have the SPI configured to run at Fosc/2 = 4MHz. In theory, shifting out 5000 bytes over SPI should take 1/4000000 * 8 * 5000 = 10ms. But according to the internal timer, it's taking just over 19ms. This seems like a ton of overhead. Is this typical? Sample ...

The chat software pick up the link and fleshes out the formatting.

Ricardo

Like so: electronics.stackexchange.com/q/134894/29792

humm... not working... maybe like so: electronics.stackexchange.com/questions/134894/…

Nick Alexeev

You have more writing in the chat post, the chat engine will not see the question link.

Ricardo

12:41 AM

Oh, I see.

Q: How to place thermistor for reading temperature in NiHM single AA cell charger?

I'm laying out a PCB for a NiMH single AA cell charger following the AVR450 Application Note - Battery Charger for SLA, NiCd, NiMH and Li-Ion Batteries but I'm not sure where to place the NTC thermistor that will read the cell temperature throughout the charging process. I plan to lay out the ce...

battery-charging thermistor nimh

Nick Alexeev

There you go.

Ricardo

@nick now it worked, many thanks!

The SE/SO sw is really great.

Funkyguy

12:59 AM

@NickAlexeev yes, I was thinking about it but I didn't take it in the end. I have an 18 credit semester as well as being the lead project coordinator for my universities IEEE branch. three of my six classes are project classes so I'm pretty busy

Nick Alexeev

1:12 AM

@Funkyguy I was going to ask about your impression of course. I couldn't take it this fall either. I've talked to the professor, though. He said that this is not the first time that this course is offered, and probably not the last.

Funkyguy

sweet! Thats good to hear, I'm always looking to improve

4 hours later…

jippie

4:58 AM

morning

9 hours later…

W5VO

1:44 PM

@jippie mornin

3 hours later…

jippie

4:29 PM

@W5VO morning

The Photon

4:40 PM

Hooray for moving targets

4 hours later…

raptortech97

8:52 PM

Hey sorry if this is totally the wrong place for this but in physics we started talking about capacitors and my teacher said he took a capacitor and physically opened it up, revealing a spiral of metal and thin paper. He passed this around and I touched it. He later mentioned that it had been wet inside and there might be some dangerous chemicals

He said that we should have washed our hands before eating. I didn't do this. Is there a chance I passed any dangerous chemicals from the capacitor to my mouth? That is, is there anything that is dangerous even in small quantities in the inside of a capacitor?

jippie

9:17 PM

@raptortech97 apart from the fact that the teacher should have thought about that before, I wouldn't worry too much.

raptortech97

@jippie great, thanks! Yeah I was kinda concerned. He said he was "half-joking" and I figured it'd be a good idea to check here.

2 hours later…

jgarbers

11:41 PM

Hi! Would anybody here be able to explain to me and my daughter why her blinky kit blinks faster when we connect it to 3V than when it is connected to 6V? Schematic here: ebay.com/itm/251626958942

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