Portable Laptop Computer Charger Plan

[SolarWatt]

So what are we saying - there is no device that a man can carry which have enough capacity to power laptop ??

I think that the answer is - No there is no such device.

Unless you don't mind walking with 50W panel on the top of your head.

By the way - does anyone knows a good wind turbine of ~50W ??

S.W

[inetdog]

By the way - does anyone knows a good wind turbine of ~50W ??
S.W

Do you plan to put that on your head and run really fast?


Actually, since any turbine regardless of size benefits from mounting high off the ground, a 50 watt (nominal in 25+ mph wind) is probably considered too small to be worthwhile for reputable manufacturers. There are probably uses for that size in far off-grid unattended low power situations, but I am just not aware of any sold to the home market.

[SolarWatt]

Do you plan to put that on your head and run really fast?
.

No, but when I'm hitch hiking - I will put the turbine outside of the car window.....

[russ]

No, but when I'm hitch hiking - I will put the turbine outside of the car window.....

Some fools actually suggest mounting a turbine on the car to generate power - never realizing they are spending more power to turn the turbine than it will generate.

[inetdog]

Some fools actually suggest mounting a turbine on the car to generate power - never realizing they are spending more power to turn the turbine than it will generate.

Not nearly as weird as someone who wants to design a piezoelectric layer inside a car tire to make use of the power that would otherwise be "wasted" in the flexing of the tire.
Or the person who proposed using an electric resistance heater and then adding some Seebeck effect thermovoltaics to use the concentrated heat of the element to generate electrical power that can then be fed back into the resistance element to supplement the outside power. Since the heat is being transferred to the room air anyway, the extra electric power must be free right?

Actually, it takes a little bit of thinking to understand why that last one does not really work. (Not just the general laws of thermodynamics, but the specific energy balance for this situation.)

[SolarWatt]

Russ -do you understand that I was joking??
By the way - when hitch hiking
1. I can charge the laptop from the car 12v
2. I am not the one that pay for the fuel

[russ]

Russ -do you understand that I was joking??
By the way - when hitch hiking
1. I can charge the laptop from the car 12v
2. I am not the one that pay for the fuel

Understood that but some loonies on green sites don't

I like the part about hitchhiking!

[inetdog]

Understood that but some loonies on green sites don't

I like the part about hitchhiking!

Hitchhiking is very green. Saves on carbon footprint.

[John J.]

I use my laptop off a 12v adapter/converter at camp sometimes but it stays at camp. Still draws about 2.5 - 3 amps. Just a note on that - while universal adapters may work I feel it's better to match the oem power requirements. Typically found/stamped on a oem 120v charger. If your mobile maybe some kind of smartphone. Take a look at a charger for one of those and see what the output is.