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interfacing — Parallax Forums

interfacing

ArchiverArchiver Posts: 46,084
edited 2002-09-24 00:57 in General Discussion
doesn anyone have information about interfacing a stamp with an iButton?
Also, i would like information about connecting sram to the stamp.

-
Ian Bobbitt
When an error occures:
A novice user blames himself,
a normal user blames the computer,
a power user sighs and gets another cup of coffee.

KB9VEX

ICQ: 14106680

It said requires windows 95 or better, so I installed Linux.

Comments

  • ArchiverArchiver Posts: 46,084
    edited 2001-01-03 19:44
    HELP!
    Since building a Stamp and interface, I have been having programs
    either locking or acting strangely.
    Power is taken from a 6V stablised supply and put thro' a 7805
    regulator. The programs down load ok, and the output is sent to a
    octagonal driver ULN2003. If the outputs drive LEDs then everything
    is ok, but when I try to drive 6V light bulbs, then the problems
    begin.Any suggestions?
    Alan Whyte
  • ArchiverArchiver Posts: 46,084
    edited 2001-01-03 20:06
    At 1/3/2001 Wednesday 07:44 PM +0000, alan.whyte@l... wrote:
    >HELP!
    >Since building a Stamp and interface, I have been having programs
    >either locking or acting strangely.
    >Power is taken from a 6V stablised supply and put thro' a 7805
    >regulator. The programs down load ok, and the output is sent to a
    >octagonal driver ULN2003. If the outputs drive LEDs then everything
    >is ok, but when I try to drive 6V light bulbs, then the problems
    >begin.Any suggestions?
    > Alan Whyte
    Hi Alan -

    The load caused by the surge of the cold filaments drawing current,
    until they heat up, is probably causing the Stamp to reset. To prove
    if this is the problem, add the following first line to your program:

    DEBUG "Started"

    If you see that MORE than once during a run, the Stamp is resetting.

    Regards,

    Bruce Bates
  • ArchiverArchiver Posts: 46,084
    edited 2001-01-03 20:15
    A 7805 will not work well from 6V. It needs a little more than that to work
    properly. They do make some low drop out (LDO) regulators that are
    equivalent and work with just a hair over 5V. LM2940 comes to mind.

    So either up your input voltage to the 7805 or swap for a 2940.

    Regards,

    Al Williams
    AWC

    * Add a PS/2 keyboard to your Stamp project:
    http://www.al-williams.com/awce/pak6.htm


    >
    Original Message
    > From: alan.whyte@l... [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=jBEIYsrW-L1Gkr5X_wBGeKUd7uQcpx3HFja3MkzEKZmCotZrKmA9gJ_Y01_LhediueWLEPKoK33Q0scjAgHh4tjRaDOmvuE]alan.whyte@l...[/url
    > Sent: Wednesday, January 03, 2001 1:44 PM
    > To: basicstamps@egroups.com
    > Subject: [noparse][[/noparse]basicstamps] Interfacing
    >
    >
    > HELP!
    > Since building a Stamp and interface, I have been having programs
    > either locking or acting strangely.
    > Power is taken from a 6V stablised supply and put thro' a 7805
    > regulator. The programs down load ok, and the output is sent to a
    > octagonal driver ULN2003. If the outputs drive LEDs then everything
    > is ok, but when I try to drive 6V light bulbs, then the problems
    > begin.Any suggestions?
    > Alan Whyte
    >
    >
    >
  • ArchiverArchiver Posts: 46,084
    edited 2001-01-04 06:17
    On Wed, 3 Jan 2001 alan.whyte@l... wrote:

    > Date: Wed, 03 Jan 2001 19:44:05 -0000
    > From: alan.whyte@l...
    > Reply-To: basicstamps@egroups.com
    > To: basicstamps@egroups.com
    > Subject: [noparse][[/noparse]basicstamps] Interfacing
    >
    > HELP!
    > Since building a Stamp and interface, I have been having programs
    > either locking or acting strangely.
    > Power is taken from a 6V stablised supply and put thro' a 7805
    > regulator. The programs down load ok, and the output is sent to a
    > octagonal driver ULN2003. If the outputs drive LEDs then everything
    > is ok, but when I try to drive 6V light bulbs, then the problems
    > begin.Any suggestions?
    > Alan Whyte
    >

    Check the current requirements of your lights. They probably draw a lot
    more than the leds, this is possibly drawing more than your power supply
    can currently handle, causing your Stamp to Brown-out and reset, if this
    is the case try using a seperate power supply for the lamps but be sure
    to make both grounds common. HTH (:-)
    -- Jerry A. Covington
    jerry@p...
  • ArchiverArchiver Posts: 46,084
    edited 2001-01-04 06:28
    On Wed, 3 Jan 2001 alan.whyte@l... wrote:
    > HELP!
    > Since building a Stamp and interface, I have been having programs
    > either locking or acting strangely.
    > Power is taken from a 6V stablised supply and put thro' a 7805
    > regulator. The programs down load ok, and the output is sent to a
    > octagonal driver ULN2003. If the outputs drive LEDs then everything
    > is ok, but when I try to drive 6V light bulbs, then the problems
    > begin.Any suggestions?
    > Alan Whyte

    PS: If the current drain exceeds the drive capability of the Stamps output
    pins you will also need to add driver transistors.
    JAC (:-)



    --
    Jerry A. Covington
    jerry@p...
  • ArchiverArchiver Posts: 46,084
    edited 2001-01-04 08:27
    ALAN

    To function correctly, most 7805 need a voltage difference between input and
    output of at least 3V at full load.
    You have two choices:
    1) Discard the 7805 and change your stabilized PS to 5V. (best choice)
    2) Maintain the 7805 and change your stabilized PS to 8V.
    Regards
    ECO
    Original Message
    From: <alan.whyte@l...>
    To: <basicstamps@egroups.com>
    Sent: mercredi 3 janvier 2001 20:44
    Subject: [noparse][[/noparse]basicstamps] Interfacing


    > HELP!
    > Since building a Stamp and interface, I have been having programs
    > either locking or acting strangely.
    > Power is taken from a 6V stablised supply and put thro' a 7805
    > regulator. The programs down load ok, and the output is sent to a
    > octagonal driver ULN2003. If the outputs drive LEDs then everything
    > is ok, but when I try to drive 6V light bulbs, then the problems
    > begin.Any suggestions?
    > Alan Whyte
    >
    >
    >
    >
    >
  • ArchiverArchiver Posts: 46,084
    edited 2002-09-23 05:28
    how would i go about interfacing my bacis stamp with a electric
    swpitch e.g. turn on/off light?
  • ArchiverArchiver Posts: 46,084
    edited 2002-09-23 20:08
    Relay, solid state relay, or triac.

    On Mon, 23 Sep 2002, gareth wrote:

    > how would i go about interfacing my bacis stamp with a electric
    > swpitch e.g. turn on/off light?
    >
    >
    > 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/
    >
    >
    >

    Sean T. Lamont, CTO / Chief NetNerd, Abstract Software, Inc. (ServNet)
    Seattle - Bellingham - Vancouver - Portland - Everett - Tacoma - Bremerton
    email: lamont@a... WWW: http://www.serv.net
    "Do not fear mistakes, There Are None" - Miles Davis
  • ArchiverArchiver Posts: 46,084
    edited 2002-09-23 22:14
    Can you provide any examples of a solid-state
    relay?


    --- "Sean T. Lamont .lost."
    <lamont@a...> wrote:
    >
    > Relay, solid state relay, or triac.
    >
    > On Mon, 23 Sep 2002, gareth wrote:
    >
    > > how would i go about interfacing my bacis
    > stamp with a electric
    > > swpitch e.g. turn on/off light?
    > >
    > >
    > > 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/
    > >
    > >
    > >
    >
    > Sean T. Lamont, CTO / Chief NetNerd, Abstract
    > Software, Inc. (ServNet)
    > Seattle - Bellingham - Vancouver - Portland -
    > Everett - Tacoma - Bremerton
    > email: lamont@a...
    > WWW: http://www.serv.net
    > "Do not fear mistakes, There Are None"
    > - Miles Davis
    >
    >
    > 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 2002-09-24 00:57
    Ebay just happens to have someone selling solid state relays.
    try a serach under business and industrial category,
    or
    http://search.ebay.com/search/search.dll?MfcISAPICommand=GetResult&query=sol
    id+state+relay&ht=1&from=R7&ebaytag1=ebayreg&CATEGORY0=12576&SortProperty=Me
    taEndSort

    Basically, they have two triacs or two scr's inside that are photosensitive.
    These allow AC to flow when you activate them. That uses two leads on one
    end, on the other end is a + and - lead which lights up the internal LED to
    activate it.

    There are also some DC versions too. But these don't use SCR's or triacs.
    Original Message
    From: Don French [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=5RGb1KCwuJzU4fS0Ze75mS84a2pZ1yzh26op4b8eBKn1Wz9mcobrJTpZ47KfpLWilwee-PXwx9rGiE9VKrY]french_don@y...[/url
    Sent: Monday, September 23, 2002 4:15 PM
    To: basicstamps@yahoogroups.com
    Subject: Re: [noparse][[/noparse]basicstamps] interfacing


    Can you provide any examples of a solid-state
    relay?


    --- "Sean T. Lamont .lost."
    <lamont@a...> wrote:
    >
    > Relay, solid state relay, or triac.
    >
    > On Mon, 23 Sep 2002, gareth wrote:
    >
    > > how would i go about interfacing my bacis
    > stamp with a electric
    > > swpitch e.g. turn on/off light?
    > >
    > >
    > > 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/
    > >
    > >
    > >
    >
    > Sean T. Lamont, CTO / Chief NetNerd, Abstract
    > Software, Inc. (ServNet)
    > Seattle - Bellingham - Vancouver - Portland -
    > Everett - Tacoma - Bremerton
    > email: lamont@a...
    > WWW: http://www.serv.net
    > "Do not fear mistakes, There Are None"
    > - Miles Davis
    >
    >
    > 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:
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