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Power Source

ArchiverArchiver Posts: 46,084
edited 2003-11-21 22:32 in General Discussion
I would love to find a fuel cell that could provide 12 volts at 2 amps for a
period of 72 hours. Fueled with something less exotic then liquid hydrogen!
Does such a critter exist? Are there any type of fuel cells available on the
market or do they fall into the 'real soon now' catagory?

Vic
________________________________________________________

Victor Fraenckel - The Windman vfraenc1@n...
KC2GUI www.windsway.com

Home of the WindReader Electronic Theodolite
Read the WIND

Comments

  • ArchiverArchiver Posts: 46,084
    edited 2001-03-12 09:46
    You could try http://www.bullnet.co.uk/shops/test/newpage25.htm although
    they do talk about Hydrogen as a fuel - but they might have other things on
    offer.

    Justin.

    Original Message
    From: Vic Fraenckel [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=BldMDf2Z0ZoKRiFN-LrKZDWwJHRjaX7_IUCWCVtHQa-JHpwFLe_2S5ZdHJ-fcb-ez7B0RjE9vSEfg_l63Oo]vfraenc1@n...[/url
    Sent: 12 March 2001 02:42
    To: Basic Stamp List
    Subject: [noparse][[/noparse]basicstamps] Power Source


    I would love to find a fuel cell that could provide 12 volts at 2 amps for a
    period of 72 hours. Fueled with something less exotic then liquid hydrogen!
    Does such a critter exist? Are there any type of fuel cells available on the
    market or do they fall into the 'real soon now' catagory?

    Vic
    ________________________________________________________

    Victor Fraenckel - The Windman vfraenc1@n...
    KC2GUI www.windsway.com

    Home of the WindReader Electronic Theodolite
    Read the WIND





    Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
  • ArchiverArchiver Posts: 46,084
    edited 2001-03-12 23:57
    look at:

    http://www.hpower.com
    http://plugpower.com
    http://ballard.com

    and ask - let us know if any are purchasable now... I think
    some use reforming of methane or propane to get their hydrogen
    source..... good luck

    >>
    Date: Sun, 11 Mar 2001 21:41:54 -0500
    From: "Vic Fraenckel" <vfraenc1@n...>

    I would love to find a fuel cell that could provide 12 volts at 2 amps
    for a
    period of 72 hours. Fueled with something less exotic then liquid
    hydrogen!

    Does such a critter exist? Are there any type of fuel cells available on
    the
    market or do they fall into the 'real soon now' catagory?
    <<

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  • ArchiverArchiver Posts: 46,084
    edited 2003-11-21 17:08
    how can i derive a +12V, -12V, and +5V to power up my chips from a wall adapter
    w/c provides +15V, 300mA? i need +12V and -12V to power up 3 LF356 opamps and
    +5V to power up BASICStamp2 chip. before i used batteries, i used two 9V batts
    to powerup the opamps and another 9V to power up the Stamp. The problem is,
    batteries run out.

    can anyone help me with this?

    -Errick


    Do you Yahoo!?
    Free Pop-Up Blocker - Get it now

    [noparse][[/noparse]Non-text portions of this message have been removed]
  • ArchiverArchiver Posts: 46,084
    edited 2003-11-21 17:31
    Try All Electronics for some inexpensive power supplies.

    http://www.allelectronics.com/cgi-bin/category.cgi?category=480&item=PS-180&type\
    =store
    http://www.allelectronics.com/cgi-bin/category.cgi?category=480&item=PS-525&type\
    =store
    http://www.allelectronics.com/cgi-bin/category.cgi?category=480&item=PS-526&type\
    =store


    Hank Hagquist
    HobbyTalk - http://www.hobbytalk.com



    Original Message
    From: "Jigorok Ano" <gorodaimon321@y...>
    To: <basicstamps@yahoogroups.com>
    Sent: Friday, November 21, 2003 12:08 PM
    Subject: [noparse][[/noparse]basicstamps] power source


    > how can i derive a +12V, -12V, and +5V to power up my chips from a wall
    adapter w/c provides +15V, 300mA? i need +12V and -12V to power up 3 LF356
    opamps and +5V to power up BASICStamp2 chip. before i used batteries, i
    used two 9V batts to powerup the opamps and another 9V to power up the
    Stamp. The problem is, batteries run out.
    >
    > can anyone help me with this?
    >
    > -Errick
    >
    >
    >
    >
    > Do you Yahoo!?
    > Free Pop-Up Blocker - Get it now
    >
    > [noparse][[/noparse]Non-text portions of this message have been removed]
    >
    >
    >
    > To UNSUBSCRIBE, just send mail to:
    > basicstamps-unsubscribe@yahoogroups.com
    > from the same email address that you subscribed. Text in the Subject and
    Body of the message will be ignored.
    >
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    > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
    >
  • ArchiverArchiver Posts: 46,084
    edited 2003-11-21 17:34
    Errick,

    One way to do it is to use two 12V wall warts. Connect them in series, and
    the middle is ground. You can also use an old computer power supply, which
    is cleaner and has the -12V.

    If you can switch to around -5V instead of -12V for the op-amps, you can
    derive the power from the Stamp itself using PWM and a charge pump. This can
    be a cool option if you can live with the lower voltage.

    Jonathan
    \
    www.madlabs.info
    Original Message
    From: "Jigorok Ano" <gorodaimon321@y...>
    To: <basicstamps@yahoogroups.com>
    Sent: Friday, November 21, 2003 9:08 AM
    Subject: [noparse][[/noparse]basicstamps] power source


    > how can i derive a +12V, -12V, and +5V to power up my chips from a wall
    adapter w/c provides +15V, 300mA? i need +12V and -12V to power up 3 LF356
    opamps and +5V to power up BASICStamp2 chip. before i used batteries, i
    used two 9V batts to powerup the opamps and another 9V to power up the
    Stamp. The problem is, batteries run out.
    >
    > can anyone help me with this?
    >
    > -Errick
    >
    >
    >
    >
    > Do you Yahoo!?
    > Free Pop-Up Blocker - Get it now
    >
    > [noparse][[/noparse]Non-text portions of this message have been removed]
    >
    >
    >
    > To UNSUBSCRIBE, just send mail to:
    > basicstamps-unsubscribe@yahoogroups.com
    > from the same email address that you subscribed. Text in the Subject and
    Body of the message will be ignored.
    >
    >
    > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
    >
    >
    >
    >
  • ArchiverArchiver Posts: 46,084
    edited 2003-11-21 22:32
    I believe if you check at Radio Shack they have
    some game controller replacement supplies that
    have a negative pin on them. While you're there,
    pick up the matching female DIN connector.

    Another approach is to use a small -12 volt
    switching regulator which runs off of +5.

    Another approach is to use +5 to drive a
    MAX232 chip. Use 1.0 uF capacitors, and take
    your +- voltage off the Max232 charge pump.
    I'm not sure how much current you can use this
    way, nor how accurate it is...


    --- In basicstamps@yahoogroups.com, Jigorok Ano <gorodaimon321@y...>
    wrote:
    > how can i derive a +12V, -12V, and +5V to power up my chips from a
    wall adapter w/c provides +15V, 300mA? i need +12V and -12V to power
    up 3 LF356 opamps and +5V to power up BASICStamp2 chip. before i
    used batteries, i used two 9V batts to powerup the opamps and another
    9V to power up the Stamp. The problem is, batteries run out.
    >
    > can anyone help me with this?
    >
    > -Errick
    >
    >
    >
    >
    > Do you Yahoo!?
    > Free Pop-Up Blocker - Get it now
    >
    > [noparse][[/noparse]Non-text portions of this message have been removed]
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