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Poll: SolarTOH, you want?
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SolarTOH, you want?

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Posts: 1,102 | Thanked: 5,643 times | Joined on Feb 2010 @ Holland
#1


This will happen. Charging your phone is a thing of the past.

Stay tuned for more.....
 

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#2
great. So this is community spirit.
I don't know in which state this is, but I hope that panel will somehow be more integrated (blended) in TOH, I would like to se TOH flat as it is now.
 
Posts: 1,102 | Thanked: 5,643 times | Joined on Feb 2010 @ Holland
#3
Some calculations.

-From this post I found that the phone will run for two days with everything turned off. The shortest day in Holland is 8 hours, so for two days I have 16 hours of sunlight.

The phone has a 2100mAh, 3.8V, 7.98Wh battery, which holds 28728 Joules. This amount of energy has to be restored in 16 hours. The solar-charger thus has to have at least 0.5 Watts of power.

The panel I have in mind right now has 0.935 Watts of power. This panel has to be hooked up to a voltage regulator to ensure a steady 5 volts.

With an input of 5.5 volts from the projected panel, the step-up/down dc-dc regulator has a measured efficiency of +- 93%, which leaves a comfortable .87 watts for the phone.

This is about 175ma @ 5 volts. Your regular laptop usb2.0 does 500ma, so its about 1/3rd of that.
 

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#4
Don't forget the power for the tracking device that will keep the solar panel constantly turned perpendicular to the sunlight.
 

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Posts: 1,102 | Thanked: 5,643 times | Joined on Feb 2010 @ Holland
#5
Originally Posted by kinggo View Post
I hope that panel will somehow be more integrated (blended) in TOH, I would like to se TOH flat as it is now.
The panel is 3mm thick, as well as the voltage regulator. So, I project the phone will we around 3mm thicker and will have slightly round back, like N9.
 
Posts: 385 | Thanked: 426 times | Joined on Dec 2009 @ Gothenburg, Sweden
#6
I would love if the other halves were stackable. Otherwise there will be constant switching, that is tiresome and I guess also wears out the mechanism that fits the halves to the back.
 

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#7
Solarpanel mixed with keyboard and NFC would be great .
 

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Posts: 1,102 | Thanked: 5,643 times | Joined on Feb 2010 @ Holland
#8
Originally Posted by MaemoUser View Post
Solarpanel mixed with keyboard and NFC would be great .
I like the enthousiasm, but you do realise this will result in an enormous phone??

"And add a battery!" "And add a drink dispenser!"

1 step at a time.
 

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Posts: 72 | Thanked: 184 times | Joined on Apr 2011 @ Germany
#9
Originally Posted by dirkvl View Post
Some calculations.

-From this post I found that the phone will run for two days with everything turned off. The shortest day in Holland is 8 hours .
Great project, but be careful with the panel's power rating. It is given for an incident light intensity of 1000W/m2, which is reached on a sunny day in central Europe around noon, with the panel facing the sun directly. As rule of thumby, a fixed panel installed at the optimal angle and direction gives the equivalent of 1000 full-intensity hours per year, a little bit less than 3 per day in average. It's more in summer, but less in winter, and depends strongly on the cloud conditions. So I guess your assumptions are a bit too optimistic.

To not sound that destructive: a nice addition would be an app that tells you the optimal angle based on time and GPS-location, using compas and acclerometer
 

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#10
Originally Posted by dirkvl View Post
I like the enthousiasm, but you do realise this will result in an enormous phone?
Yeah, I thought about that, and I'm ok with it. I'd personally use an enormous (what is enourmous? 2cm thick?) phone most of the time, and swap the other half with a skinny one if I'm going out for drinks or something. This is where TOH is really powerful, and loads of good things could come out of it.
 

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