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Solar power and the Basic Stamp — Parallax Forums

Solar power and the Basic Stamp

Buck RogersBuck Rogers Posts: 2,189
edited 2007-12-17 13:00 in BASIC Stamp
Hello!
Okay here's a new idea: Can a BS2 be powered by a crowd of standard model solar cells, and be managing a datalogger device? idea.gif Remember that's the gizmo wrapped around the one from FTDI and using an appropriate sized thumb drive as its storage mechanism.

I worked out this one as a thought experiment figuring it would need some help along from the group here. While I'm not planning on stuffing this thing into a vacuum safe shell and making arrangements to park it in orbit, especially since it would also need a means of sending its information down here, and currently that's beyond me, I figured it would make a good example of what's really possible with them.

Okay so the idea looks like its really a bird normally found in Maine. jumpin.gif

But I am famous in real life for strange ideas.

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Buck Rogers

www.gregg.levine.name

Comments

  • PJAllenPJAllen Banned Posts: 5,065
    edited 2007-12-15 01:50
    How many solar cells comprise a "crowd"?

    What's the rating of each?
  • allanlane5allanlane5 Posts: 3,815
    edited 2007-12-15 02:10
    If you can get 1 or 2 mA continuously at 6 volts or better, this might work.
  • Mike GreenMike Green Posts: 23,101
    edited 2007-12-15 02:30
    You would probably do better with a BS2pe and the datalogger with logging done first to the 30K of EEPROM in the BS2pe, then power up the datalogger and copy the 30K in one operation to the datalogger then power it down. The BS2pe takes very little power if it's in NAP mode a lot. You could trickle charge an NiMH battery and use that to power stuff and keep things going when the sun goes behind a cloud.

    Hitt Consulting's datalogger uses less current than the one that Parallax sells, but it uses an MMC or SD card and is limited to using 32MB.
    Check here: www.hittconsulting.com/.
  • Buck RogersBuck Rogers Posts: 2,189
    edited 2007-12-15 03:04
    PJ Allen said...
    How many solar cells comprise a "crowd"?

    What's the rating of each?

    Hello!
    Honestly? When it comes to a rating for the ones that I am thinking of, I actually do not know. I saw these while picking up something else several days ago.

    Since at the time I was focused on this other thing, they just flitted by. roll.gif

    As for a crowd, I was thinking of the item count to provide the proper voltages for running the devices without unduly straining anything.

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    Buck Rogers

    www.gregg.levine.name
  • Buck RogersBuck Rogers Posts: 2,189
    edited 2007-12-15 03:07
    allanlane5 said...
    If you can get 1 or 2 mA continuously at 6 volts or better, this might work.

    Hello!
    Sounds reasonable. I will of course need to double-check the ratings on the cells of course.

    Think of the classic satellite design, solar cells as paddles, grabbing a ball or tube, with the object in question being the container for the things the satellite was sent up to do.

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    Buck Rogers

    www.gregg.levine.name
  • Buck RogersBuck Rogers Posts: 2,189
    edited 2007-12-15 03:12
    Mike Green said...
    You would probably do better with a BS2pe and the datalogger with logging done first to the 30K of EEPROM in the BS2pe, then power up the datalogger and copy the 30K in one operation to the datalogger then power it down. The BS2pe takes very little power if it's in NAP mode a lot. You could trickle charge an NiMH battery and use that to power stuff and keep things going when the sun goes behind a cloud.

    Hitt Consulting's datalogger uses less current than the one that Parallax sells, but it uses an MMC or SD card and is limited to using 32MB.
    Check here: www.hittconsulting.com/.

    Hello!
    It's an idea. However I had originally worked out the whole arrangement like this:
    Think of the classic satellite design, solar cells as paddles, grabbing a ball or tube, with the object in question being the container for the things the satellite was sent up to do.

    The other one is that I have here both a 64MB and I believe a 256MB thumb drive and they just lend themselves to a
    simple seeming gizmo like this.
    hop.gif

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    Buck Rogers

    www.gregg.levine.name
  • allanlane5allanlane5 Posts: 3,815
    edited 2007-12-15 14:55
    Yeah, "Thumb" drives require a USB 'master' device -- which the BS2 can't do without a co-processor. I'm not sure of the power a "Thumb" drive requires -- the Hitt consulting logger using an SD card (or whatever) will probably be more practical.
  • stephenwagnerstephenwagner Posts: 147
    edited 2007-12-17 12:59
    Buck,

    Here is an interesting solar powered data logging application note published by Parallax.

    http://www.parallax.com/Portals/0/Downloads/appnt/stamps/bs1Appnotes.pdf

    I hope this helps.

    SJW
  • stephenwagnerstephenwagner Posts: 147
    edited 2007-12-17 13:00
    Application No. 17.
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