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I have an older laptop that does not operate on batteries, 110v adapter only.
If I determine the polarity of my adapter, and I make an auto (cig lighter) connection, will the high auto amperage make laptop toast?
I thank all you folks. I was unclear (what's new).
My adapter puts out [12volts, ?ma.] and I wanted to hook direct to auto. The laptop is 12v DC as is the car. Pixellany, am pretty sure your unit is 19v DC.
We understood your intention of tying directly into the Vehicles DC power, but were offering safer alternatives. Hate to see good kit go to waste.
Keep in mind Automobile power is NOT 12v DC.. Mine is around 13.5-13.8v when the vehicle is running and there is noise on the line from the ignition system and alternator.. At the very least you should construct a 12v DC Regulator with a noise filter, so then at least you know for sure what you are pumping into the laptop..
The power supply might have the output current rating listed on its sticker. You should put a fuse on the input however the problems lies in what voltage variations the computer can handle. Nominal alternator voltage output is ~13.8 but it can peak as high as 14.5. Without knowing if any internal components work directly off the 12VDC I would be reluctant to plug it directly into the cig lighter.
All good input. Many thanks, now perhaps we should get on to real linux issues?
I get so much information from your answers to others questions I don't want to disrupt that further. (So much new turf for me to cover).