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Anonymous Poster

External Power supply

12/02/2007 11:05 AM

I am making an extended trip to a remote section of a third world country & will be making numerous PowerPoint presentations & can not count on the local "power supply"; therefore I need an external battery pack that will have enough juice to power a projector for the PowerPoint presentations. I THINK I can recharge it back at the hotel each night. My computer has its own battery pack & can run well by itself, but I need something for the projector.

Can you give any suggestions on products that can meet my needs?

Jeremy

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#1

Re: External Power supply

12/02/2007 11:39 AM

1st step is to find out what the projector needs. Have a look at the rating plate. What is the wattage (or VA) rating, or amperage & voltage? Does it need DC or AC ?

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#2

Re: External Power supply

12/02/2007 11:57 AM

You don't say how remote but you need to be warned that it may even be worse than expected.

Another aspect to be remembered is the 110v - 220/230v issue.

I would go for a pessimistic approach and take chargers / converters / and a petrol generator along.

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#3

Re: External Power supply

12/02/2007 11:22 PM

Your external battery pack will be really heavy due to the power consumption of the projector, it's two or three times more than the consumption of your laptop. In addition you will need a DC/AC converter.

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#4

Re: External Power supply

12/03/2007 4:02 AM

Get the people at the far end to give you full and complete details of all electrical sources.....without that, you will travel looking like Noah and his Ark!!

Why not hold the conference at the hotel if they have power?

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#5

Re: External Power supply

12/03/2007 5:53 AM

How many slides? Have you considered printing them and using a flip chart?. It needs no power at all.

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#10
In reply to #5

Re: External Power supply

12/03/2007 12:10 PM

Good answer. I have run into a similar situation in travel to several East African nations. Typically, I carry a PowerPoint presentation on the computer and rely on a projector at the site with photocopies of any important slides. Flip chart drawings to do in-depth explanations.

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#6

Re: External Power supply

12/03/2007 6:09 AM

Hi Guest.

How are you going to get there? If it is by motor transport then why not take along a small petrol or diesel powerd generator set, they are cheap enough these days.

Spencer.

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#7

Re: External Power supply

12/03/2007 6:45 AM

If you are going by car/truck pick up a low cost inverter (without charger) to connect to the cars battery. Run extension cord to projector. You only need to figure out how many watts you need. I know the problem, I'm in a 3rd. world country and run my inverter 6-8 hours a day.

Good luck!

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#8

Re: External Power supply

12/03/2007 8:39 AM

I use an automotive "jump-start" battery pack. The unit has a cigarette lighter plug in the top and can be recharged either through this plug or a wall mount AC adaptor. You need to check the continous power requirement of the projector to see if the pack is up to the task. I use mine to "top off" my Itronix computer so the required current is relatively low.

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#9
In reply to #8

Re: External Power supply

12/03/2007 9:09 AM

Hi Guest.

I say do not, I repeat do not, connect to your cigarette lighter!!!

Spencer.

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#11

Re: External Power supply

12/04/2007 10:36 AM

Battery solution I proposed will not work for you. The In-Focus projector we have at work is 250 watt. From a 12 volt battery that translates to ~20.8 amps.

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#12
In reply to #11

Re: External Power supply

12/04/2007 10:47 AM

Hi ClarkP.

As I have said before, your best bet is to carry with you a portable generator set, they cater for a huge range of loads and voltage/ampere, etc.

I used to carry one with me in the wilds of Africa, and they never failed me.

Spencer.

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#13
In reply to #12

Re: External Power supply

12/04/2007 12:11 PM

Be careful with a generator, check the output with a scope as some have a badly formed sine wave that can give problems with electronic equipment.....this can also be true of inverters.....

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#14

Re: External Power supply

12/04/2007 2:17 PM

What Andy said is true, be careful of the wave form. I use an inverter with a modified sine wave but have not found anything that won't run. I would be interested in anything that won't run, as we make inverters. Good excuse to do more testing at home

D.

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#15

Re: External Power supply

12/05/2007 2:17 PM

Are you able to carry another 80lb? You can buy a UPS. Make sure you get one with correct voltage and able to be power on without being plug in. APC is the brand I'll go with.


Pineapple

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