Re: [bolger] 12 volt power supply
Here is another 12 VDC input internal power supply for a PC, very nice:
http://www.keypower.com/DC_power/DX-200Q.htm~$125
Efficiency is rated at 70%, so if your PC wants 100 (of the supply's 200)
watts, for example, the power supply needs 12 amps, with 3.5 amps wasted
(heat).
Keypower also lists a conventional AC->DC PC supply at 70%, so assume it
will also waste a similar number of battery amps. Good inverters list
efficiencies from 75% (Trace) to 97% (Invertrix, I don't believe it), and
cheapo inverters, I think, appear to be 50-60%. I know a little 100 watt
cheapie I had would keep your coffee warm. Anyway, I would think an
inverter setup would double your loss.
Of course, the best plan is laptop, which probably runs on 50 watts anyway.
The last two I have had, however, conveniently run on 16 and 19 VDC, so
you are still stuck with an inverter.
Gregg Carlson
At 09:06 AM 12/2/2000 -0800, you wrote:
http://www.keypower.com/DC_power/DX-200Q.htm~$125
Efficiency is rated at 70%, so if your PC wants 100 (of the supply's 200)
watts, for example, the power supply needs 12 amps, with 3.5 amps wasted
(heat).
Keypower also lists a conventional AC->DC PC supply at 70%, so assume it
will also waste a similar number of battery amps. Good inverters list
efficiencies from 75% (Trace) to 97% (Invertrix, I don't believe it), and
cheapo inverters, I think, appear to be 50-60%. I know a little 100 watt
cheapie I had would keep your coffee warm. Anyway, I would think an
inverter setup would double your loss.
Of course, the best plan is laptop, which probably runs on 50 watts anyway.
The last two I have had, however, conveniently run on 16 and 19 VDC, so
you are still stuck with an inverter.
Gregg Carlson
At 09:06 AM 12/2/2000 -0800, you wrote:
>I am sending this from a "12 volt power supply" - that is a battery bank
>that runs an inverter. In this case, the inverter is a large trace that
>makes a square wave. It works fine, and in fact powers our whole household
>including a computer based business that my wife runs. However, since your
>pc only needs 100 to 150 watts, a smaller inverter that makes a "sine wave"
>would be best. They are not too expensive. If your computer is a smaller
>laptop, one of the little convenience plug in inverters would work. i have
>one that I might be willing to ship you to try. Calling a local vendor tho
>sells photovoltaic pannels will get you going, but gather some prices as
>they vary greatly.
>Jim
>
>fung42@...wrote:
>
>> greetings from south america,
>> I wonder if anyone has information on 12volt power supplies for
>> pentium computers, suitable for marine use..
>> Regards.
>>
>>
>> Bolger rules!!!
>> - no cursing, flaming, trolling, or spamming
>> - no flogging dead horses
>> - add something: take "thanks!" and "ditto!" posts off-list.
>> - stay on topic and punctuate
>> - add your comments at the TOP and SIGN your posts
>
>
>
>Bolger rules!!!
>- no cursing, flaming, trolling, or spamming
>- no flogging dead horses
>- add something: take "thanks!" and "ditto!" posts off-list.
>- stay on topic and punctuate
>- add your comments at the TOP and SIGN your posts
>
>
>
Thanks very much to all members who answered my question. Think that
I have enough information to make a decision.
Regards
I have enough information to make a decision.
Regards
Greetings from New Zealand... I use an inverter without problems.
Jeremy
Fu-T'ien, Mana, NZ
-----Original Message-----
From:fung42@...<fung42@...>
To:bolger@egroups.com<bolger@egroups.com>
Date: Sunday, 3 December 2000 01:16
Subject: [bolger] 12 volt power supply
Jeremy
Fu-T'ien, Mana, NZ
-----Original Message-----
From:fung42@...<fung42@...>
To:bolger@egroups.com<bolger@egroups.com>
Date: Sunday, 3 December 2000 01:16
Subject: [bolger] 12 volt power supply
>greetings from south america,
>I wonder if anyone has information on 12volt power supplies for
>pentium computers, suitable for marine use..
> Regards.
>
>
>
>Bolger rules!!!
>- no cursing, flaming, trolling, or spamming
>- no flogging dead horses
>- add something: take "thanks!" and "ditto!" posts off-list.
>- stay on topic and punctuate
>- add your comments at the TOP and SIGN your posts
>
>
I am sending this from a "12 volt power supply" - that is a battery bank
that runs an inverter. In this case, the inverter is a large trace that
makes a square wave. It works fine, and in fact powers our whole household
including a computer based business that my wife runs. However, since your
pc only needs 100 to 150 watts, a smaller inverter that makes a "sine wave"
would be best. They are not too expensive. If your computer is a smaller
laptop, one of the little convenience plug in inverters would work. i have
one that I might be willing to ship you to try. Calling a local vendor tho
sells photovoltaic pannels will get you going, but gather some prices as
they vary greatly.
Jim
fung42@...wrote:
that runs an inverter. In this case, the inverter is a large trace that
makes a square wave. It works fine, and in fact powers our whole household
including a computer based business that my wife runs. However, since your
pc only needs 100 to 150 watts, a smaller inverter that makes a "sine wave"
would be best. They are not too expensive. If your computer is a smaller
laptop, one of the little convenience plug in inverters would work. i have
one that I might be willing to ship you to try. Calling a local vendor tho
sells photovoltaic pannels will get you going, but gather some prices as
they vary greatly.
Jim
fung42@...wrote:
> greetings from south america,
> I wonder if anyone has information on 12volt power supplies for
> pentium computers, suitable for marine use..
> Regards.
>
>
> Bolger rules!!!
> - no cursing, flaming, trolling, or spamming
> - no flogging dead horses
> - add something: take "thanks!" and "ditto!" posts off-list.
> - stay on topic and punctuate
> - add your comments at the TOP and SIGN your posts
Here is one DC-DC power supply:
http://www.winsystems.com/products/pc104/pdc_dc.htm
I have also seen other; thought one was "kaypro" (?), but I don't see
it on their site now. Point is, tney are around.
Of course, you should check efficiencies [12VDC->converter type
supply->motherboard] vs. [12VDC->inverter->115 VAC input standard
power supply->motherboard]. Multiply efficiencies for total.
Gregg Carlson
http://www.winsystems.com/products/pc104/pdc_dc.htm
I have also seen other; thought one was "kaypro" (?), but I don't see
it on their site now. Point is, tney are around.
Of course, you should check efficiencies [12VDC->converter type
supply->motherboard] vs. [12VDC->inverter->115 VAC input standard
power supply->motherboard]. Multiply efficiencies for total.
Gregg Carlson
--- Inbolger@egroups.com, fung42@h... wrote:
> greetings from south america,
> I wonder if anyone has information on 12volt power supplies for
> pentium computers, suitable for marine use..
> Regards.
Figure out the total peak power consumption your computer and peripherals
will use and double it. Now get a cheap (probably under $100) inverter that
will deliver that amount of power. Hook everything up and go.
Chuck
will use and double it. Now get a cheap (probably under $100) inverter that
will deliver that amount of power. Hook everything up and go.
Chuck
> greetings from south america,
> I wonder if anyone has information on 12volt power supplies for
> pentium computers, suitable for marine use..
> Regards.
>
greetings from south america,
I wonder if anyone has information on 12volt power supplies for
pentium computers, suitable for marine use..
Regards.
I wonder if anyone has information on 12volt power supplies for
pentium computers, suitable for marine use..
Regards.