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[in english please] Auto-boot hardware for car PC
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By:
Zorro_X
Rank:
Starfleet Lieutenant, Junior Grade
Postings:
7
From:
n/a
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Posted:
Mo Mär 26, 2007 - 12:52
Message has been edited, Click Here to view/hide original messageOriginal Message - [03/26/2007]
Hi,
I’m looking for equipment able to manage only the turning ON or OFF of a motherboard in same way as ITPS did. It seems that it is no more available. Did you know an alternative low-cost solution to this problem ?
Thank you in advance,
Z Hi,
I’m looking for equipment able to manage only the turning ON or OFF of a motherboard in same way as ITPS did. It seems that it is no more available. Did you know an alternative low-cost solution to this problem ?
Thank you in advance,
Z
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By:
Pierre
Rank:
Starfleet Captain
Postings:
117
From:
n/a
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Posted:
Mo Mär 26, 2007 - 01:41
What you need is an optocoupler which will fullfill the task of ON/OFF in the most secure way 
http://www.fairchildsemi.com/pf/4N/4N35.html |
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By:
Zorro_X
Rank:
Starfleet Lieutenant, Junior Grade
Postings:
7
From:
n/a
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Posted:
Mo Mär 26, 2007 - 05:23
Message has been edited, Click Here to view/hide original messageOriginal Message - [03/26/2007]
As i know, the optocouplers act only as a relay, so how may this one do a switch toggle at power on and a switch toggle at power off ?! As far as I know, the optocouplers act only as a relay (transistor), so how may this one do a switch toggle at power on and a switch toggle at power off ?!
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By:
Pierre
Rank:
Starfleet Captain
Postings:
117
From:
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Posted:
Mo Mär 26, 2007 - 09:09
The answer is in your question
So we have at least a +12v feeded from the car when we turn the key aren't we ?
Now on the other side of the optocoupler, you can make it switch what you want, if a delay is needed then have a look at the 555
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By:
Zorro_X
Rank:
Starfleet Lieutenant, Junior Grade
Postings:
7
From:
n/a
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Posted:
Mo Mär 26, 2007 - 09:40
Message has been edited, Click Here to view/hide original messageOriginal Message - [03/26/2007]Original Message - [03/26/2007]
In fact i need then something like this :
Input :
1 |------------------|
0 __| |______
Out :
1 |---| |---|
0 __| |______________| |__
(What do you call a "555" ??) In fact i need then something like this :
Input :
1 |------------------|
0 __| |______
Out :
1 |---| |---|
0 __| |______________| |__
(What do you call a "555" ??) In fact i need then something like this :
Input :
1 |------------------|
0 __| |______
Out :
1 |---| |---|
0 __| |______________| |__
(What do you call a "555" ??) |
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By:
Zorro_X
Rank:
Starfleet Lieutenant, Junior Grade
Postings:
7
From:
n/a
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Posted:
Di Mär 27, 2007 - 06:29
Sorry i wasn't able to do a correct ASCII draw... what do you call a "555" ?
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By:
Pierre
Rank:
Starfleet Captain
Postings:
117
From:
n/a
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Posted:
Di Mär 27, 2007 - 10:17
Here it is, a simple timer component http://www.datasheetcatalog.com/datasheets_pdf/N/E/5/5/NE555.shtml
With both optocoupler and NE555 you can do what you search for, it will cost you some cents nothing more.
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By:
Zorro_X
Rank:
Starfleet Lieutenant, Junior Grade
Postings:
7
From:
n/a
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Posted:
Di Mär 27, 2007 - 05:35
ok, but i'm not an electronician, i don't know how to connect them up in order to made what i want...  |
By:
Pierre
Rank:
Starfleet Captain
Postings:
117
From:
n/a
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Posted:
Di Mär 27, 2007 - 06:49
Message has been edited, Click Here to view/hide original messageOriginal Message - [03/27/2007]SO the NE555 or two NE555 could toggle on/off on desired timings, they should be the "brain" of the switch and their outputs will feed the optocoupler(s) depending if you want to cut + and/or ground.
You will find with google how to calculate the needed resistors to make the NE555 work
Alternate solution, using a micro controller which will then allow you any fantasy with timings 
SO the NE555 or two NE555 could toggle on/off on desired timings, they should be the "brain" of the switch and their outputs will feed the optocoupler(s) depending if you want to cut + and/or ground.
You will find with google how to calculate the needed resistors to make the NE555 work
Alternate solution, using a micro controller which will then allow you any fantasy with timings
They are many examples on the web for this specific use and often you will find a pcb, needed components list and of course the code to flash the micro controller.
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By:
Zorro_X
Rank:
Starfleet Lieutenant, Junior Grade
Postings:
7
From:
n/a
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Posted:
Di Mär 27, 2007 - 10:50
ok, thank you... i'll try...
I've also found the ITPS pcb & code to flash. (into car-tft's provider's site : http://www.mini-box.com/site/index.html)
Thank you any way, even if your solutions seems dificult to me for mading it...
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