Posted by Eric Desrochers on March 24, 2007, 3:40 pm
Hello. This might be off topic but this group is the closest thing I
could find for my question to be answered!
I have a special application where I need to power a video projector
(aka data projector, digital projector, LCD projector, DLP video
projector) in a mobile setup, from a power inverter off 12 volts
battery.
I'm seeking to determine if I need a pure sine wave inverter for feeding
a video projector or if a modified sine will do. As you guessed, the
3:1 price difference between the two type is the issue! Easy answer
would be "try it" but I'm affraid of causing damages. Hence this
preventive posting!
Actual video projector is a BenQ with a 265 watts rating and allowable
input voltage from 100 volts to 240 volts AC (probably meaning a
switching, regulated power supply).
Comments welcomed! Thanks!
--
Eric (Dero) Desrochers
http://homepage.mac.com/dero72
" Hiroshima 45, Tchernobyl 86, Windows 95 "
Posted by Solar Bus Driver on March 24, 2007, 3:50 pm
I strongly recommend a sine wave inverter, unless you're just doing this for
fun, ie, to watch movies on the wall with your kids.
Most likely with a modified sinewave inverter, you will see a line going
slowly up the screen, to the top, and then it will start again at the
bottom.
I can't say for sure but I've seen it a lot with modified sine. Same thing
with TVs and computer monitors.
I'm using an Outback (sinewave) and I've shown movies on it before with very
good results. But you shouldn't need a 2K inverter just to run your
projector. Check the wattage of the projector, and then double it. That
should do just fine, and give you some power to amplify the sound or
whatever else you want to do.
-Gary
------------------------------------
THE SOLAR BUS
a solar energy education project on wheels
http://solarbus.org
------------------------------------
Posted by Steve Spence on March 25, 2007, 9:59 pm
You don't get lines with a lcd projector on MSW.
You don't get it on lcd monitors or tv's either.
--
Steve Spence
Director, Green-Trust
http://www.green-trust.org
>I strongly recommend a sine wave inverter, unless you're just doing this
>for fun, ie, to watch movies on the wall with your kids.
> Most likely with a modified sinewave inverter, you will see a line going
> slowly up the screen, to the top, and then it will start again at the
> bottom.
> I can't say for sure but I've seen it a lot with modified sine. Same
> thing with TVs and computer monitors.
> I'm using an Outback (sinewave) and I've shown movies on it before with
> very good results. But you shouldn't need a 2K inverter just to run your
> projector. Check the wattage of the projector, and then double it. That
> should do just fine, and give you some power to amplify the sound or
> whatever else you want to do.
> -Gary
> ------------------------------------
> THE SOLAR BUS
> a solar energy education project on wheels
> http://solarbus.org
> ------------------------------------
>
Posted by Eric Desrochers on March 27, 2007, 12:39 am
> You don't get lines with a lcd projector on MSW.
>
> You don't get it on lcd monitors or tv's either.
OK, so I guess I should try it! I was concerned about damaging the
projector but according to several research I did on the web, I think
that even if msw can lessen performance of some devices, it's rarely
dangerous.
--
Eric (Dero) Desrochers
http://homepage.mac.com/dero72
" Hiroshima 45, Tchernobyl 86, Windows 95 "
Posted by Eric Desrochers on March 27, 2007, 1:02 am
Me again! One last thing about inverters. Some modified sine wave
inverter feature "filtred" output. Do those offer a less harsh power or
is it mostly to prevent interferences? Any waveform pics available
somewhere?
PS : Is there an inverter newsgroup? :)
--
Eric (Dero) Desrochers
http://homepage.mac.com/dero72
" Hiroshima 45, Tchernobyl 86, Windows 95 "
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>for fun, ie, to watch movies on the wall with your kids.
> Most likely with a modified sinewave inverter, you will see a line going
> slowly up the screen, to the top, and then it will start again at the
> bottom.
> I can't say for sure but I've seen it a lot with modified sine. Same
> thing with TVs and computer monitors.
> I'm using an Outback (sinewave) and I've shown movies on it before with
> very good results. But you shouldn't need a 2K inverter just to run your
> projector. Check the wattage of the projector, and then double it. That
> should do just fine, and give you some power to amplify the sound or
> whatever else you want to do.
> -Gary
> ------------------------------------
> THE SOLAR BUS
> a solar energy education project on wheels
> http://solarbus.org
> ------------------------------------
>