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using bs2p to power a 12v lamp? — Parallax Forums

using bs2p to power a 12v lamp?

ArchiverArchiver Posts: 46,084
edited 2004-05-14 21:50 in General Discussion
i have a group of 12v train set lamps i would like to turn on and
off using a basic stamp. how do i get 12 volts from an output on the
bs2p and demo board. thanks mark

Comments

  • ArchiverArchiver Posts: 46,084
    edited 2004-05-14 21:04
    Hello,
    This part will work if the current is under 500mA
    http://www.parallax.com/detail.asp?product_id=500-00005. There is also a
    good article here
    http://www.parallax.com/dl/docs/cols/nv/vol1/col/nv6.pdf for controlling
    higher voltage devices.


    Stephen Swanson
    Technical Support Manager
    Parallax, Inc.
    599 Menlo Drive, #100
    Rocklin, CA 95765
    Phone (916) 624-8333
    Original Message
    From: sponsitility [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=7ZLfTD0mG-jJFcUDJbQG0g5BzkjdxZmZzp4YLwuVUHoakk95CnHJdd-PjHP23j8TjKVAamJTZDriERo5QNRnXQ]markmcleod50@y...[/url
    Sent: Friday, May 14, 2004 12:53 PM
    To: basicstamps@yahoogroups.com
    Subject: [noparse][[/noparse]basicstamps] using bs2p to power a 12v lamp?

    i have a group of 12v train set lamps i would like to turn on and
    off using a basic stamp. how do i get 12 volts from an output on the
    bs2p and demo board. thanks mark



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  • ArchiverArchiver Posts: 46,084
    edited 2004-05-14 21:07
    I don't think you do. You switch a transistor which connects to the
    12V source.

    Ref: Nuts & Volts #6 "Silicon Steriods for your Stamp"
    http://www.parallax.com/dl/docs/cols/nv/vol1/col/nv6.pdf

    On the other hand, if the lights are stationary (i.e. RR Crossing vs.
    lights on a moving train), you might want to consider replacing them
    with 5V LED's ... Then you could do kool things like raise and lower
    crossings and blinking lights and even a miniture airport with the
    sequential lights :-) Sounds like a fun project!

    --- In basicstamps@yahoogroups.com, "sponsitility"
    <markmcleod50@y...> wrote:
    > i have a group of 12v train set lamps i would like to turn on and
    > off using a basic stamp. how do i get 12 volts from an output on
    the
    > bs2p and demo board. thanks mark
  • ArchiverArchiver Posts: 46,084
    edited 2004-05-14 21:13
    Wow! Pretty cool! For those interested, here is the spec sheet:
    http://www.st.com/stonline/books/pdf/docs/1536.pdf


    --- In basicstamps@yahoogroups.com, "Stephen Swanson" <sswanson@p...>
    wrote:
    > Hello,
    > This part will work if the current is under 500mA
    > http://www.parallax.com/detail.asp?product_id=500-00005. There is
    also a
    > good article here
    > http://www.parallax.com/dl/docs/cols/nv/vol1/col/nv6.pdf for
    controlling
    > higher voltage devices.
    >
    >
    > Stephen Swanson
    > Technical Support Manager
    > Parallax, Inc.
    > 599 Menlo Drive, #100
    > Rocklin, CA 95765
    > Phone (916) 624-8333
    >
    >
    Original Message
    > From: sponsitility [noparse][[/noparse]mailto:markmcleod50@y...]
    > Sent: Friday, May 14, 2004 12:53 PM
    > To: basicstamps@yahoogroups.com
    > Subject: [noparse][[/noparse]basicstamps] using bs2p to power a 12v lamp?
    >
    > i have a group of 12v train set lamps i would like to turn on and
    > off using a basic stamp. how do i get 12 volts from an output on
    the
    > bs2p and demo board. thanks mark
    >
    >
    >
    > 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.
    >
    > Yahoo! Groups Links
    >
    >
    >
    >
    >
    >
    >
    > This message has been scanned by WebShield. Please report SPAM to
    > abuse@p...
  • ArchiverArchiver Posts: 46,084
    edited 2004-05-14 21:50
    --- In basicstamps@yahoogroups.com, "Stephen Swanson" <sswanson@p...>
    wrote:
    > Hello,
    > This part will work if the current is under 500mA
    www.parallax.com/detail.asp?product_id=500-00005


    The ULN2803 is a good chip, but one word or caution is that you
    cannot load all 8 channels silumutaniouslyouly (extra letters added
    to make sure I got them all in there)

    8 channles at 500mA is 4 amps. the chip cannot handle that high of a
    load.

    Dave






    > There is also a
    > good article here
    > http://www.parallax.com/dl/docs/cols/nv/vol1/col/nv6.pdf for
    controlling
    > higher voltage devices.
    >
    >
    > Stephen Swanson
    > Technical Support Manager
    > Parallax, Inc.
    > 599 Menlo Drive, #100
    > Rocklin, CA 95765
    > Phone (916) 624-8333
    >
    >
    Original Message
    > From: sponsitility [noparse][[/noparse]mailto:markmcleod50@y...]
    > Sent: Friday, May 14, 2004 12:53 PM
    > To: basicstamps@yahoogroups.com
    > Subject: [noparse][[/noparse]basicstamps] using bs2p to power a 12v lamp?
    >
    > i have a group of 12v train set lamps i would like to turn on and
    > off using a basic stamp. how do i get 12 volts from an output on
    the
    > bs2p and demo board. thanks mark
    >
    >
    >
    > 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.
    >
    > Yahoo! Groups Links
    >
    >
    >
    >
    >
    >
    >
    > This message has been scanned by WebShield. Please report SPAM to
    > abuse@p...
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