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#1
Posted to rec.audio.car
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Laptop in Car: DC-DC Power Supply vs. DC/AC Inverter?
I'd like to have my laptop (Sony Vaio PCG-K27) powered while in the car
for MP3s, DVD, GPS, etc. I've tried inverters, all producing the 60 hz hum when connected to the head unit. It's my impression the 60hz tone comes from the inverter's AC output. Would a simple DC-DC power supply such as the one below eliminate the source of noise? -Or- would the system then be vulnerable to engine noise, etc? TigerDirect.com Item #: A250-1094 http://www.tigerdirect.com/applicati...2835&CatId=608 Thanks- AJ |
#2
Posted to rec.audio.car
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Laptop in Car: DC-DC Power Supply vs. DC/AC Inverter?
I am not sure about the noise, but a DC to DC converter like that would work better. DC to AC to DC seems kind of silly, dosent it. If you want to try it out, go to radioshack, they have one on clearance for $12 (down from 80). If you dont like it you can return it. -- mastarecoil |
#3
Posted to rec.audio.car
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Laptop in Car: DC-DC Power Supply vs. DC/AC Inverter?
It will work but you still may get noise from the drives/CPU due the the
laptop's grounding scheme. You can use isolation transformers which range from dirt cheap to damn expensive or a small USP sound card which often times is optically isolated. Chad wrote in message oups.com... I'd like to have my laptop (Sony Vaio PCG-K27) powered while in the car for MP3s, DVD, GPS, etc. I've tried inverters, all producing the 60 hz hum when connected to the head unit. It's my impression the 60hz tone comes from the inverter's AC output. Would a simple DC-DC power supply such as the one below eliminate the source of noise? -Or- would the system then be vulnerable to engine noise, etc? TigerDirect.com Item #: A250-1094 http://www.tigerdirect.com/applicati...2835&CatId=608 Thanks- AJ |
#4
Posted to rec.audio.car
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Laptop in Car: DC-DC Power Supply vs. DC/AC Inverter?
I have a Toshiba laptop that works from 15 volts DC. Yours may be same. A
converter MAY NOT even be necessary. You may be able to connect your laptop directly to your car's 12-14 volt power supply without any problem. It's worth a try. The worst that can happen is that your laptop will not start up (not enough volts). But don't worry, this won't fry anything (as long as you have the negative going to the negative and the positive going to the positive). It may operate within a window of 12-16 volts. I connect my portable DVD player directly to my car's power supply with no converter. It is rated at 14 volts and it works no problem. MOSFET wrote in message oups.com... I'd like to have my laptop (Sony Vaio PCG-K27) powered while in the car for MP3s, DVD, GPS, etc. I've tried inverters, all producing the 60 hz hum when connected to the head unit. It's my impression the 60hz tone comes from the inverter's AC output. Would a simple DC-DC power supply such as the one below eliminate the source of noise? -Or- would the system then be vulnerable to engine noise, etc? TigerDirect.com Item #: A250-1094 http://www.tigerdirect.com/applicati...2835&CatId=608 Thanks- AJ |
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