morning

morning

Why would I want to use a supervisory circuit IC like this if I am using, for example, a new-age ARM M0+ microcontroller which includes a watchdog, brown-out reset and bunch of other protection mechanisms for code integrity?

Also, the IC that I've linked uses 10uA!

@abdullahkahraman Don't know, only thing I can think of is that you can monitor another voltage rail, one that is impacted slightly earlier than the controller's power rail.

@jippie Hmm, yes, that could be it. For example there is 12V > 5V > 3.3V and let's assume there are bulky capacitors.

oh I forgot to mention the but-part

But again, the important rail is MCU's rail and it can measure it up itself..

but the maximum rating of the device is only 5'ish volts.

maybe for a controller that hasn't a WD?

@jippie Is there such a thing these days?

for a developer that is too lazy to read the WD-chapter in the controller's datasheet?

told you up front, I don't know.

@jippie The IC I've linked its datasheet has an absolute maximum VCC of 5.5V

@jippie Then they will have to pay extra $1.something and PCB area? lol

@jippie I really cannot think of any reason.. There should be a reason. I saw this IC in Mouser's "New Products" page.

@abdullahkahraman yes, that was my but part

I have to go, I'll check later today for the correct answer

@jippie Take care!

*Sorry it has an absolute maximum VCC rating of 6V.

Are there any new microprocessors that doesn't incorporate any watch-dog timers?

Probably that is the reason, since the datasheet says this IC is for microprocessors.

Also, it could be about transients. This device is for automotive applications as it can be read in the datasheet. Also there is this thing in the datasheet about transients:

For example, Freescale KE04 series ARM Cortex M0+ microcontrollers have low-voltage detect (LVD) module in them which can be set to create a reset and/or warning on selectable voltage level(s). However it adds 130uA when the MCU is in the STOP mode. According to the datasheet "LVD is periodically woken up from Stop by 5% duty cycle. The period is equal to or less than 2 ms.".

So, it could also be about power.

Hello everyone

@Ell Hi!

Hi :)

I want to prepare myself for learning electrical engineering next year

I'm not sure if I can without having lectures though

Hwy whats the deal with the site ??

Why the questions I have seen fading ? They are fading so much I cant even see them now

@abdullahkahraman how are you doing? How is your Masters studies going?

whoa....i am new here...i didnt know people know each other as well here

@placeholder Is this the old guy who is an IC designer? :)

@abdullahkahraman Depends on your meaning of "old" but I do believe I am that same "person"

@placeholder Long time no see :)

How are you?

I just happened to ask a question, I am lucky we have an expert here! :)

I blew out a tire on my walker last week, so I haven't been able to get around very well. ;) How are you doing, you're studies progressing and you are still working with your father repairing electronics?

@abdullahkahraman what question? am I old?

Close friends vacationed in Turkey this summer, they absolutely loved it and loved the people that they met.

In the datasheet of ACT2802 - 5V/2.5A Backup Battery Pack Manager, it gives an application example, regarding "Input Over Voltage Surge". It says:

@placeholder A tire on your walker? I hope that is a joke?

Yes, I have one more class to take and then I will have to pick a thesis subject and work on it. I have no idea what I am going to do.

I am still working with my father, and he is still repairing electronics :)

We have a big AC motor driver here and it is being tested now. I cannot here the button sounds of my keyboard lol..

@abdullahkahraman Of course you silly person!

But I am not doing any repairs, only changing SMT components where my father's eyes cannot handle :)

@abdullahkahraman what areas does your advisor work in? I got lots of ideas

@placeholder OH, because it is a good joke and I want to laugh at it with no doubt. :)

@abdullahkahraman get a stereo microscope, then make lots of listakes and then he'll start to do it himself.

@placeholder I didn't even pick an advisor! :|

@abdullahkahraman Yet ...

@placeholder Hhahahahha, he is planning on buying a microscope with a big ass LCD screen but I am telling him this is too much! Am I stingy? lol

@placeholder Yes :'(

@abdullahkahraman Screen is fine, but stereo is better for hand soldering, depth does help.

depth perception rather.

So what is your question about that diagram?

Now, regarding my question, I don't think R1 and C1 will help surges. Because if we assume that there is a small Vin capacitance in the IC, it will charge to whatever voltage there is in the Vin pin, isn't that right?

Methinks (without looking at datasheet) that teh R is there because some ceramic caps are self resonant, i.e. they have ESL (series inductance) and can ring. The R is to dampen that down.

OK, now that I've actually read your blurb. It's not the ESL of the cap per se, but the inductance of the connecting wire.

@placeholder Oh, so it is the wire(inductance) and the C1 that will ring?

@abdullahkahraman yep, that is the "tank" circuit.

@abdullahkahraman Oh ... your last line actually says that ... What are you doing asking me to read your question for you? ...

@placeholder Oh, I see now.. The C1 itself will create voltage spikes when there is a long wire, not the source.. It assumes the source is clean and the wires are long enough to create problem.

@placeholder Hhahahaha

Aaaaah yes, english is your second language

@placeholder lol

I am a novice in electronics! Pity on me!

@abdullahkahraman well, the stimulus is a rapid edge from plugging in that excites the resonance.

So , either I Did read that and the spoon feed it back to you so I'd look clever. OR I actually determined that answer and then got confirmation from your own write up. You will never know for sure.... Bwahahaha

@placeholder I see, high frequency content of the input signal that will contain the tank circuit's resonant frequency..

@abdullahkahraman it's all about excitation!!!!

@placeholder Hahahhaha

I thought the !!!! was proper there

lol

So, how is your job? Are you getting retired soon?

@abdullahkahraman My boss is a real ***hole, I fight with him alllll the time.

@placeholder I can come to your country kill him and sneak out, nobody will know lol

Oh, I will just put it here, with no intentions at all:

@abdullahkahraman I would know, up until the point that you kill me. And now that I know you're coming I can always hide. ;)

@placeholder So you are your own boss now?

@abdullahkahraman Have been ever since you met me. So no need for the "now".

@abdullahkahraman Whats the point? you know I don't care about the rep ...

@abdullahkahraman that is a different question than that above.

@abdullahkahraman just to help you with your English "Are you getting retired soon?" is better written as " Are you retiring soon?"

@abdullahkahraman there - answered the stinking thing.

Gotta go, the geriatric nurse is coming with some pills for me and I need to take my walker into the repair shop.

@placeholder Thanks :)

@placeholder Hahahahhahahahha

Take care

@placeholder OK, I will accept it as an answer some time later :)

morning

Aloha

¡hola!

@jippie Oh great, you've got one of those communist keyboards with funny characters on it.

@ThePhoton HP branded

it is common in spanish to use the ¡

it is on your keyboard too if you have an AltGr key

@jippie Yeah, but I thought the Dutch were on "our" side since they manage to speak a foreign language without using any funny letters.

AltGr !

Nope, Dell is from Texas and they don't have that kind of foreign stuff.

Funny how a girl can change your knowledge of keyboards.

The Phøtøn

Now I'm actually kind of sad I don't have an AltGr key.

uøʇøɥԀ ǝɥ┴

@jippie You're making me dizzy.

I can imagine, there are all sorts of intersting characters with that key.

I have to get to the shop before it gets dark

type to you in a few minutes

Now look what you made me waste my time on:你好

nice

what is it

which customer is getting charged for your hours?