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IR badges — Parallax Forums

IR badges

ArchiverArchiver Posts: 46,084
edited 2002-04-25 06:27 in General Discussion
Hello BX-24ers,

I'm making a small infrared emitter badge to register badge location in
a space with distributed IR detectors. The badges consist of the BX-24,
an IR LED, and powersource.

Each badge needs a unique IR pulse rate.

Can anyone suggest some simple BX24 code that I could play with to get
unique pulse rates for each badge I build?

Many thanks

Robert

Comments

  • ArchiverArchiver Posts: 46,084
    edited 2002-04-24 01:55
    How about not changing the pulse rate and use standard 40khz so
    all the receivers will be the same just send out different ID
    Like a sony IR remote for a TV,VCR.

    Original Message
    From: "Robert RJC Whelan" <rrw216@n...>
    To: <basicstamps@yahoogroups.com>
    Sent: April 23, 2002 5:45 PM
    Subject: [noparse][[/noparse]basicstamps] IR badges



    Hello BX-24ers,

    I'm making a small infrared emitter badge to register badge
    location in
    a space with distributed IR detectors. The badges consist of the
    BX-24,
    an IR LED, and powersource.

    Each badge needs a unique IR pulse rate.

    Can anyone suggest some simple BX24 code that I could play with
    to get
    unique pulse rates for each badge I build?

    Many thanks

    Robert


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  • ArchiverArchiver Posts: 46,084
    edited 2002-04-24 04:02
    Go with a Dallas Semiconductor one-wire silicon serial number (DS2401)
    transmitted on a set modulation.

    http://dbserv.maxim-ic.com/quick_view2.cfm?qv_pk=2903

    -Rob
    Original Message
    From: "Robert RJC Whelan" <rrw216@n...>
    To: <basicstamps@yahoogroups.com>
    Sent: Tuesday, April 23, 2002 8:45 PM
    Subject: [noparse][[/noparse]basicstamps] IR badges


    >
    > Hello BX-24ers,
    >
    > I'm making a small infrared emitter badge to register badge location in
    > a space with distributed IR detectors. The badges consist of the BX-24,
    > an IR LED, and powersource.
    >
    > Each badge needs a unique IR pulse rate.
    >
    > Can anyone suggest some simple BX24 code that I could play with to get
    > unique pulse rates for each badge I build?
    >
    > Many thanks
    >
    > Robert
    >
    >
    > 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 2002-04-25 05:08
    Hi all,

    > How about not changing the pulse rate and use standard 40khz so
    > all the receivers will be the same just send out different ID
    > Like a sony IR remote for a TV,VCR.

    This is sort of related, does anyone have any solutions for using a
    basic stamp to control a VCR. eg acting as a IR remote ?

    Cheers

    Robin



    >
    Original Message
    > From: "Robert RJC Whelan" <rrw216@n...>
    > To: <basicstamps@yahoogroups.com>
    > Sent: April 23, 2002 5:45 PM
    > Subject: [noparse][[/noparse]basicstamps] IR badges
    >
    >
    >
    > Hello BX-24ers,
    >
    > I'm making a small infrared emitter badge to register badge
    > location in
    > a space with distributed IR detectors. The badges consist of the
    > BX-24,
    > an IR LED, and powersource.
    >
    > Each badge needs a unique IR pulse rate.
    >
    > Can anyone suggest some simple BX24 code that I could play with
    > to get
    > unique pulse rates for each badge I build?
    >
    > Many thanks
    >
    > Robert
    >
    >
    > 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/
    >
    >
    >
    >
    > 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 2002-04-25 06:27
    I don't see why this could not be done with pulse out. A 2 usec
    resolution ought to be plenty fast enough. When I asked about this
    earlier, I was immediately flamed with disbelievers that say it's not
    possible. I don't think the stamp would be able to create the 40 khz
    carrier, but I believe it could modulate that carrier created with an
    external oscillator with the info from this link. Here's a link a found
    on the subject that is cryptic, but seems to contain a lot of good
    info. If I could just figure out what the bit stream is and use it to
    modulate a 40 Khz or so IR carrier, I think it might work. Course, I am
    not an engineer by trade I am an electronics Technician / Instructor.
    Here's the link, would appreciate any data you come up with:

    http://www.geocities.com/SiliconValley/Lakes/3947/infrared.htm


    Leroy

    Robin Petterd wrote:
    >
    > Hi all,
    >
    > > How about not changing the pulse rate and use standard 40khz so
    > > all the receivers will be the same just send out different ID
    > > Like a sony IR remote for a TV,VCR.
    >
    > This is sort of related, does anyone have any solutions for using a
    > basic stamp to control a VCR. eg acting as a IR remote ?
    >
    > Cheers
    >
    > Robin
    >
    > >
    Original Message
    > > From: "Robert RJC Whelan" <rrw216@n...>
    > > To: <basicstamps@yahoogroups.com>
    > > Sent: April 23, 2002 5:45 PM
    > > Subject: [noparse][[/noparse]basicstamps] IR badges
    > >
    > >
    > >
    > > Hello BX-24ers,
    > >
    > > I'm making a small infrared emitter badge to register badge
    > > location in
    > > a space with distributed IR detectors. The badges consist of the
    > > BX-24,
    > > an IR LED, and powersource.
    > >
    > > Each badge needs a unique IR pulse rate.
    > >
    > > Can anyone suggest some simple BX24 code that I could play with
    > > to get
    > > unique pulse rates for each badge I build?
    > >
    > > Many thanks
    > >
    > > Robert
    > >
    > >
    > > 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/
    > >
    > >
    > >
    > >
    > > 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/
    > >
    > >
    > >
    >
    > 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/
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