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1 mm^2 PV Cell

Discussion in 'Electronic Basics' started by Bret Cahill, Jun 17, 2013.

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  1. Bret Cahill

    Bret Cahill Guest

    A 100 microwatt PV panel shouldn't cost too much on a production
    basis.


    Bret Cahill
     
  2. Bret Cahill

    Bret Cahill Guest

    A 100 microwatt PV panel shouldn't cost too much on a production
    What's really surprising -- no one has even commented on this either
    -- is the size of the smallest micro electronic item is still as large
    or larger than DARPA's insect drones.

    It's as though everything sold to consumers _must_ have a key pad,
    buttons or switches that require cm^2 of surface area.

    How this mentality got grandfathered in is a mystery. Garden lights
    have no buttons or size requirements so there is no reason not to
    miniturize garden lights for Dollar Store "Glowing Sand" or confetti.

    In that case the LED, PV and battery would be printed up on paper and
    cost almost nothing.


    Bret Cahill
     
  3. Bret Cahill

    Bret Cahill Guest

    A 100 microwatt PV panel shouldn't cost too much on a production
    Different colors could be used to "paint" on the sides of buildings.


    Bret Cahill
     
  4. ®

    ® Guest

    There's already glow-in-the-dark-paint.

    When I type "glow" into Google's search field, the first suggestion to
    pop up is "glow in the dark paint".
     
  5. Bret Cahill

    Bret Cahill Guest

    In that case the LED, PV and battery would be printed up on paper and
    It won't glow all night w/o UV or other illumination.

    Rail roads won't light up their rolling stock with garden lights
    because it would get stolen. Something the size of sand would be too
    time consuming to vandalize. Graffitti artists would have to paint
    the entire box car to blot it out.

    Box car artists might even turn to using the PV_LED-battery sand
    themselves. This stuff could be printed up on huge sheets and then
    cut into little bits so all they'd need is some spray adhesive and a
    leaf blower.


    Bret Cahill
     
  6. Bret Cahill

    Bret Cahill Guest

    A 100 microwatt PV panel shouldn't cost too much on a production
    This is nothing less than the next phase of the microelectronics
    revolution.


    Bret Cahill


    "A long habit of not thinking a thing _wrong_ gives it a superficial
    appearance of being _right_ . . .."

    -- The infamous incendiary Thomas Paine
     
  7. Bret Cahill

    Bret Cahill Guest

    In that case the LED, PV and battery would be printed up on paper and
    Scaling down garden lights might go as far as originally hoped for the
    simple reason PV energy/day ~ surface area, while battery energy /day
    ~ volume.

    Battery box energy density would have to be 25X higher than a garden
    light at the 1mm characteristic length.


    Bret Cahill
     
  8. the letter K

    the letter K Guest

    Just make it into an impedance matching exercise.
    Like your imaginary wind-powered car that tapped power off one wheel to
    travel downwind faster than the wind that pushed it.
     
  9. Bret Cahill

    Bret Cahill Guest

    I wish there was a really good glow-in-the-dark stuff, but it's probably
    Fun in the father of invention.


    Bret Cahill
     
  10. Bret Cahill

    Bret Cahill Guest

    In that case the LED, PV and battery would be printed up on paper and
    I would ge even further and make it a quasi Law of Thermo

    It's the same energy storage problem as micro garden lights. The only
    material / battery / super cap that could store enough energy would be
    a high explosive much higher than anything except nukes. Li-ion is
    probably the limit and has been misleading as to future breakthroughs.

    The only thing that would put out enough light all night or keep drive
    trains turning would have to be air breathing.

    Either you burn something in air or you sit in darkness at night.


    Bret Cahill
     
  11. Bret Cahill

    Bret Cahill Guest

    In that case the LED, PV and battery would be printed up on paper and >> >>> cost almost nothing. >> >> >> Different colors could be used to "paint" on the sides of buildings. >> >> >> Bret Cahill >> >> >There's already glow-in-the-dark-paint. >> >> >When I type "glow" into Google's search field, the first suggestion to >> >pop up is "glow in the dark paint". >> >>The strontium aluminate stuff is impressive, 10:1 or so better than zinc >> sulfide. >> >> People in remote villages could leave sheets of that outdoors and take them in >> at night as usable illumination. No batteries to degrade. >> >> I wish there was a really good glow-in-the-dark stuff, but it's probably >> physically impossible. > >I would ge even further and make ita quasi Law of Thermo > >It's the same energy storage problem as micro garden lights. The only >material / battery / super cap that could store enough energy would be >a high explosive much higher than anything except nukes.Li-ion is >probably the limit and has been misleading as to future breakthroughs.
    A book light maybe but cooking 200 gms of rice? No way.

    Back to the OP issue of scaling down garden lights to coarse sand size ~ 1 mm^3:

    The rechargeable AAA cell has a volume of 4300 mm^3 and the PV is 30 mm X 30 mm or 900 mm^2 of photo voltaic.

    Reducing the PV area and battery volume by 900 results in a 5 mm^3 battery.

    If the battery was printed 1 mm thick on a sheet the battery area would be 2.2 mm X 2.2 mm so if it existed cheap 3% efficiency PV would be just as good at keeping the light on all night.

    2.2 mm X 2.2 mm X 2.2 mm cubes would be more like small pebbles than coarsesand and only put out 100 microwatts of light maximum.


    Bret Cahill
     
  12. the letter K

    the letter K Guest

    Now I am puzzled. Is the laughing gem a really good glower, or is it
    some really good stuff that also happens to glow? More investigation,
    please.
     
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