Author Topic: How this ic work?  (Read 2993 times)

0 Members and 1 Guest are viewing this topic.

Offline nhdyhhTopic starter

  • Newbie
  • !
  • Posts: 1
  • Country: in
 

Offline Rerouter

  • Super Contributor
  • ***
  • Posts: 4694
  • Country: au
  • Question Everything... Except This Statement
Re: How this ic work?
« Reply #1 on: April 25, 2018, 11:19:55 am »
You really need to improve your question

The 74HC595 chip is a shift-register, you feed it serial data, and it produces a parrellel output, likely used in an LED display to drive a large number of LED's from a small number of microcontroller pins

The 74HC04 is an inverter chip, logic high becomes logic low, and vice-vesa, It again can be used to drive an LED that would draw more current than a microcontroller may be able to provide.
 

Offline Rerouter

  • Super Contributor
  • ***
  • Posts: 4694
  • Country: au
  • Question Everything... Except This Statement
Re: How this ic work?
« Reply #2 on: April 25, 2018, 11:26:23 am »
Sounds like your asking for there "Equivalent Circuits", or the parasitic information on the inputs and outputs?

for the 595, look on page 9, If you need it broken down further, it gets more manufacturer dependent.  https://www.onsemi.cn/PowerSolutions/document/MC74HC595-D.PDF

for the 74hc04, well this is very manufacture and series dependand, a good starting point would be this page, http://www.piclist.com/images/www/hobby_elec/e_sampl1_1.htm
 

Online ebastler

  • Super Contributor
  • ***
  • Posts: 6202
  • Country: de
Re: How this ic work?
« Reply #3 on: April 25, 2018, 11:38:49 am »
 :-//
 
The following users thanked this post: tooki, nugglix

Offline agehall

  • Frequent Contributor
  • **
  • Posts: 381
  • Country: se
Re: How this ic work?
« Reply #4 on: April 25, 2018, 12:41:00 pm »
Sounds like it didn't take SDBFG long to register a new account...  :-DD  |O
 
The following users thanked this post: amyk, tooki, nugglix, Nitrousoxide

Offline rstofer

  • Super Contributor
  • ***
  • Posts: 9886
  • Country: us
Re: How this ic work?
« Reply #5 on: April 25, 2018, 01:35:31 pm »
Sounds like it didn't take SDBFG long to register a new account...  :-DD  |O

And apparently OP has missed out on the Google thing.
 
The following users thanked this post: tooki

Offline Brumby

  • Supporter
  • ****
  • Posts: 12288
  • Country: au
Re: How this ic work?
« Reply #6 on: April 25, 2018, 01:43:52 pm »
Sounds like it didn't take SDBFG long to register a new account...  :-DD  |O

So ... I'm not the only one wondering about this.
 

Online hexreader

  • Frequent Contributor
  • **
  • Posts: 260
  • Country: england
Re: How this ic work?
« Reply #7 on: April 25, 2018, 01:58:00 pm »
I am guessing that you are still trying to build a large moving-message LED display?

Is it mono or colour display that you intend to build?

How many dots wide?

How many dots high?

What physical size (height and width)?

74HC595 is just a cheap and simple way to gain a lot of outputs from an MCU with few spare pins. It can be used in many, many, different ways.
 

Offline wraper

  • Supporter
  • ****
  • Posts: 16794
  • Country: lv
Re: How this ic work?
« Reply #8 on: April 25, 2018, 02:41:21 pm »
Don't bother replying in this thread, as OP is just yet another spam account.
 

Offline BravoV

  • Super Contributor
  • ***
  • Posts: 7547
  • Country: 00
  • +++ ATH1
Re: How this ic work?
« Reply #9 on: April 25, 2018, 02:52:53 pm »
Sounds like it didn't take SDBFG long to register a new account...  :-DD  |O

So ... I'm not the only one wondering about this.

First few encounters could be exciting or even fun, just wait until flock of them joined here, really hope not.

Just pity the mods team if this happened.

Offline BravoV

  • Super Contributor
  • ***
  • Posts: 7547
  • Country: 00
  • +++ ATH1
Re: How this ic work?
« Reply #10 on: April 25, 2018, 03:03:09 pm »
Don't bother replying in this thread, as OP is just yet another spam account.

Actually not spamming, its just the attitude that is like dumping what ever popped out in their mind, or they like or feel like without any consideration at all, and usually comes with very demanding request like the community owe the OP.

And if not answered, they just love to bombard with new threads again and again on the same subject, or worst keep bumping the thread every hours ... for weeks.

Oh ... also usually these people will not happy if the responds are not they like to hear, and will keep nagging again and again.

Really wish I am wrong , but its just the fact I have seen for years at so many nice forums they've trashed.

Online Simon

  • Global Moderator
  • *****
  • Posts: 17728
  • Country: gb
  • Did that just blow up? No? might work after all !!
    • Simon's Electronics
Re: How this ic work?
« Reply #11 on: April 25, 2018, 03:12:52 pm »
There is the option to ignore them.... let the thread die
 

Offline wraper

  • Supporter
  • ****
  • Posts: 16794
  • Country: lv
Re: How this ic work?
« Reply #12 on: April 25, 2018, 03:15:23 pm »
Actually not spamming, its just the attitude that is like dumping what ever popped out in their mind, or they like or feel like without any consideration at all, and usually comes with very demanding request like the community owe the OP.
Currently it's not, but will be in the future. IMO this is to get post count high. Yesterday apparently the same person asked more than 10 unrelated useless questions before got banned.
 

Offline BravoV

  • Super Contributor
  • ***
  • Posts: 7547
  • Country: 00
  • +++ ATH1
Re: How this ic work?
« Reply #13 on: April 25, 2018, 03:16:58 pm »
There is the option to ignore them.... let the thread die

I have done that at many forums that I used to hang out, but at the end once you are overwhelmed by the SNR that is so low beyond your sensitivity level, and also once the mods show the sign of giving up, usually its a sign to leave, which I really hate.
« Last Edit: April 25, 2018, 03:25:02 pm by BravoV »
 

Online ebastler

  • Super Contributor
  • ***
  • Posts: 6202
  • Country: de
Re: How this ic work?
« Reply #14 on: April 25, 2018, 03:23:12 pm »
There is the option to ignore them.... let the thread die

Short of blocking the OP (yet), could you lock those threads?
 
The following users thanked this post: nugglix

Offline BBBbbb

  • Supporter
  • ****
  • Posts: 289
  • Country: nl
Re: How this ic work?
« Reply #15 on: April 25, 2018, 03:26:02 pm »
IMO this is to get post count high. Yesterday apparently the same person asked more than 10 unrelated useless questions before got banned.
My thoughts exactly.
Probably selling some scam stuff, and just trying to build up post count / rep. Person(s) behind it are not too familiar with electronics and English, but they are trying at least...
 

Offline amyk

  • Super Contributor
  • ***
  • Posts: 8240
Re: How this ic work?
« Reply #16 on: April 26, 2018, 12:30:20 am »
Actually not spamming, its just the attitude that is like dumping what ever popped out in their mind, or they like or feel like without any consideration at all, and usually comes with very demanding request like the community owe the OP.
Currently it's not, but will be in the future. IMO this is to get post count high. Yesterday apparently the same person asked more than 10 unrelated useless questions before got banned.
Given that he seems to be honest about his country (unlike some other more aggressive spammers we've seen before), I don't think he's aiming to spam. Just a typical persistent dullard.

Perhaps the registration form should detect specific "problematic" countries (either self-selected or by IP), and give those users a basic knowledge quiz... something easily Googlable, not too hard but not too easy (1+1=?). There's a certain repair forum which does a similar thing.

nhdyhh , please do the needful before trying to post again.
 

Offline BravoV

  • Super Contributor
  • ***
  • Posts: 7547
  • Country: 00
  • +++ ATH1
Re: How this ic work?
« Reply #17 on: April 26, 2018, 12:45:16 am »
Perhaps the registration form should detect specific "problematic" countries (either self-selected or by IP), and give those users a basic knowledge quiz... something easily Googlable, not too hard but not too easy (1+1=?). There's a certain repair forum which does a similar thing.

This is not easy, as it feels like stereotyping, and could spark pros & cons, even among mods themselves. Its a concerning matter for sure.


nhdyhh , please do the needful before trying to post again.

Damn, its infectious.  :-DD

Offline BravoV

  • Super Contributor
  • ***
  • Posts: 7547
  • Country: 00
  • +++ ATH1
Re: How this ic work?
« Reply #18 on: April 26, 2018, 06:21:37 am »
And if not answered, they just love to bombard with new threads again and again on the same subject, or worst keep bumping the thread every hours ... for weeks.

Oh ... also usually these people will not happy if the responds are not they like to hear, and will keep nagging again and again.

Really wish I am wrong , but its just the fact I have seen for years at so many nice forums they've trashed.

Enough said -> https://www.eevblog.com/forum/repair/help-needed-to-repair-hp-spectrum-analyser/msg1497331/#msg1497331

PS : Actually I do have tons of fine examples in this forum alone, its just not worth it to dig them out.


Online Simon

  • Global Moderator
  • *****
  • Posts: 17728
  • Country: gb
  • Did that just blow up? No? might work after all !!
    • Simon's Electronics
Re: How this ic work?
« Reply #19 on: April 26, 2018, 06:40:47 am »
Perhaps the registration form should detect specific "problematic" countries (either self-selected or by IP), and give those users a basic knowledge quiz... something easily Googlable, not too hard but not too easy (1+1=?). There's a certain repair forum which does a similar thing.

This is not easy, as it feels like stereotyping, and could spark pros & cons, even among mods themselves. Its a concerning matter for sure.



It would be completely the wrong approach, the biggest problem user we ever had was from the UK, so do we blacklist the UK ??? another nightmare member was from Germany..... The quality of the forum depends on the how people use it including how much they feed trolls or make nonsensical threads the hottest thread in town and then complain that this "spam" keeps coming up. We tend to err on the safe side and people don't get banned for asking the odd silly question, being silly does not break any rules.
 
The following users thanked this post: EEVblog, mtdoc, BillB

Offline BravoV

  • Super Contributor
  • ***
  • Posts: 7547
  • Country: 00
  • +++ ATH1
Re: How this ic work?
« Reply #20 on: April 26, 2018, 09:57:09 am »
It would be completely the wrong approach, the biggest problem user we ever had was from the UK, so do we blacklist the UK ??? another nightmare member was from Germany..... The quality of the forum depends on the how people use it including how much they feed trolls or make nonsensical threads the hottest thread in town and then complain that this "spam" keeps coming up.

Agree, as I said, its not easy to make a conclusion and decision out of these.


We tend to err on the safe side and people don't get banned for asking the odd silly question, being silly does not break any rules.

I guess one or two incidents for few days or per week are still manageable and not a big deal from moderator's POV.

Its just I wish you guys mods never have to live thru the hell if this expands into multiple folds in magnitude.

Thank you Simon for all your time & energy in taking care of this unpleasant matter, just want you to know that I do appreciate what you've done here.  :-+

Online Simon

  • Global Moderator
  • *****
  • Posts: 17728
  • Country: gb
  • Did that just blow up? No? might work after all !!
    • Simon's Electronics
Re: How this ic work?
« Reply #21 on: April 26, 2018, 10:02:00 am »
We have had a spat of chinese posters just putting copy paste stuff up to later add links in their sig but they seem to have given up. If someone does create a load of nonsensical posts they will get removed, we can be tolerant of ignorance but after lets say 3 nonsensical topics the difference between ignorance and spam is pretty clear.
 

Online tggzzz

  • Super Contributor
  • ***
  • Posts: 19280
  • Country: gb
  • Numbers, not adjectives
    • Having fun doing more, with less
Re: How this ic work?
« Reply #22 on: April 26, 2018, 11:33:34 am »
We tend to err on the safe side and people don't get banned for asking the odd silly question, being silly does not break any rules.

For the record, although I might not always have made the same decisions you (lot) do, I haven't seen anything boneheaded - and I think you (lot) do an excellent job.

Keep it up, please.
There are lies, damned lies, statistics - and ADC/DAC specs.
Glider pilot's aphorism: "there is no substitute for span". Retort: "There is a substitute: skill+imagination. But you can buy span".
Having fun doing more, with less
 


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf