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Thread: "Transflective" LCD panel with res touch+controler for $101+$36 S+H

  1. #1611
    MySQL Error scott_fx's Avatar
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    Quote Originally Posted by 8838.com View Post
    Hi, we suggest you use a DC-DC PSU, or connect directly to car`s 12V cigarette port. If you put it at home, an AC-ADAPTER will be recommend

    regular AC-DC PSU will be too powerful and easy to burn the board
    how can it be too powerful? if you get an ac-dc psu with a 12v output and at lease 2 amps. seems like you'd be good to go witha ac-dc psu
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  2. #1612
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    Quote Originally Posted by scott_fx View Post
    how can it be too powerful? if you get an ac-dc psu with a 12v output and at lease 2 amps. seems like you'd be good to go witha ac-dc psu
    That is what I got reply from the tech guy, after we receive few burn board replies by using the regular PC-PSU

    It is not saying the AC-PSU will burn the board 100%, but there is a chance, so we do not recommend to use PC AC-PSU.

  3. #1613
    Maximum Bitrate rray's Avatar
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    I used the intellegent dc-dc converter from the mp3car store, set to 12v output, and it powered th carpc and screen fine. (atom 2800 based)

  4. #1614
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    I see you must have done what I did and made an adapter rray. However i Want someway to go directly from the car battery to a 12v 2amp output. Any ideas anyone? I really dont want to burn up another one.

  5. #1615
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    Quote Originally Posted by psi3000 View Post
    I see you must have done what I did and made an adapter rray. However i Want someway to go directly from the car battery to a 12v 2amp output. Any ideas anyone? I really dont want to burn up another one.
    DC-DC PSU is the best solution. Or, you can use the cigarette port 12V, that one has protection circuit which is safe to use

  6. #1616
    Variable Bitrate camo.b's Avatar
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    If your handy with a soldering iron you can get a decent heatsink,small amount of pcb a couple of diodes and a 7812ct voltage regulator the 7812 has 3 pins voltage in..ground and vol out.pretty easy and it will cope with 2amp with a decent heat sink....
    Can do the same with a 7805 voltage reg for a stable 5v.these can be lined up in a project box so you can have 9-14v in and a stable 12v and 5v out...costs very little and a bit of fun
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  7. #1617
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    This is great. I am very handy with a soldering iron. Do you have a schematic?

  8. #1618
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    Maybe 8388.com can chime in and tell us the actual power consumption of the LCD? As the 7812ct is only rated for 1.5 amps.....

  9. #1619
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    The problem with using the 7812 is that if alternator/engine is not running, the battery does not provide enough power to work the 7812 properly, most regulators like this need a 2v overhead above the output so technically you need a constant 14v. I am in the same delema, I want to regulate for led lighting, very low draw but not enough input power. Just my 2 cents SNO

  10. #1620
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    Good point Sno it really didn't think bout that.as mine goes on and off with the ingition....the 5v 7805 for my usb parts is happy.

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