Can I use this LCD display: http://www.itontec.com/product-detail/product-name-7/
With this adapter:
*Display Specs: Power Supply(5~12V 2A)
*Adapter Specs: Output: 12V - 1A
Is that safe to use this adapter with this display?
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Think about it again. The display wants 2A, the adapter can supply 1A. What do you think will the adapter do? – PlasmaHH Apr 15 '15 at 21:58
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I don't know. I'm very ignorant about electronics. I'm trying to learn. What happens if I use this adapter with this display? – mertyildiran Apr 15 '15 at 22:00
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From reading the specs provided above, it appears as if the monitor wants somewhat less than 10 Watts of power. Assuming that the monitor has a switch mode power supply internally (good assumption because the monitor would have to somehow get rid 14 Watts of heat with a 12 Vdc input), a power supply input of 12 Vdc should also have to supply about 10 Watts. That's less than 1 Amp. – Dwayne Reid Apr 15 '15 at 23:19
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@DwayneReid I tried to use adapter with display one hour age and it's working fine. I think it's draining less than 1 Amp yeah you right. – mertyildiran Apr 16 '15 at 01:57
2 Answers
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Rather not. The specs of your display say that it might need 2A at times, and this would overload your adapter. This means that its voltage drops and the adapter might heat up, or break in the long run.
There's a chance those 2A spec are for the lower end of the voltage (5V) and it will pull less for 12V, but that would only be the case if you see a switching DC/DC regulator on the PCB. If it's a linear regulator, it will take 2A and just convert the extra voltage to heat.
DerManu
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Maybe yes, maybe no. You will have to try it and see.
Because the monitor says "5-12V 2A", there is a very good chance that the monitor has a switch-mode supply internally. That would cause the monitor to consume about 2 Amps with a 5 Vdc input (10 Watts) but consume less than 1 Amp with a 12 Vdc input (also about 10 Watts).
The only way to find out for sure is to try it.
If it doesn't work, no damage should occur to either the power supply or monitor. It just won't work.
My best guess is that it will work just fine.
Dwayne Reid
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2Overloading the wall wart power supply by 100%? I wouldn't try. It might break or -- if it's a cheap one -- melt/smell/burn. – DerManu Apr 15 '15 at 22:02
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1@mertyildiran: Very unlikely. It might "brown out", i.e. controllers might reset due to low voltage. In electronics as simple as displays that usually is nothing to worry about. – DerManu Apr 15 '15 at 22:07
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@DerManu Okay then the safest solution is using 12v 2a power supply. Am I correct? – mertyildiran Apr 15 '15 at 22:16
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