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BS2 OEM kit question — Parallax Forums

BS2 OEM kit question

ArchiverArchiver Posts: 46,084
edited 2001-03-29 02:26 in General Discussion
Has anyone bought a BS2 OEM kit and put it together themselves recently?

I sent the following question to parallax last week, but haven't heard
back.

The kit comes with a 47k Ohm resistor and there is a diagram on the pcb to
put the resistor between two of the terminals of the crystal. However,
this step is not mentioned in the construction details that came with the
kit and I couldn't find any info on their website (their circuit diagrams
on the website don't contain the resistor).


Does anyone know if I should solder the resistor in place? (The stamp
seems to work without it...)

Thanks,

Nick

Comments

  • ArchiverArchiver Posts: 46,084
    edited 2001-03-27 23:05
    I've never seen a resistor connected in parallel with a crystal. If it
    works, assume this is a misprint.

    By the way, how did the assembly go? Does it look like its worth the money?

    I'm not worried about space, so I thought about using an OEM BS2 for some
    stuff on the robot due to the lower cost.

    Original Message


    > Has anyone bought a BS2 OEM kit and put it together themselves recently?
    >
    > I sent the following question to parallax last week, but haven't heard
    > back.
    >
    > The kit comes with a 47k Ohm resistor and there is a diagram on the pcb to
    > put the resistor between two of the terminals of the crystal. However,
    > this step is not mentioned in the construction details that came with the
    > kit and I couldn't find any info on their website (their circuit diagrams
    > on the website don't contain the resistor).
    >
    >
    > Does anyone know if I should solder the resistor in place? (The stamp
    > seems to work without it...)
  • ArchiverArchiver Posts: 46,084
    edited 2001-03-27 23:54
    >Has anyone bought a BS2 OEM kit and put it together themselves recently?
    >
    >I sent the following question to parallax last week, but haven't heard
    >back.

    You will.


    >The kit comes with a 47k Ohm resistor and there is a diagram on the pcb to
    >put the resistor between two of the terminals of the crystal. However,
    >
    >Does anyone know if I should solder the resistor in place? (The stamp
    >seems to work without it...)

    I asked the same question and their answer was that it is not needed with the
    current kits. There was an older revision that did.
  • ArchiverArchiver Posts: 46,084
    edited 2001-03-28 00:59
    Hi Nick,

    I believe the resistor should be used, It's a new item because the the
    stamp is using a new Interpreter chip which is slightly different
    electrically.

    You can find additional info under the what's new section at parallax

    then download the following pdf

    "Notice of Change in BS2 Interpreter Chip Hardware"

    It should mention this additional resistor

    good luck,
    '
    Steve





    At 04:37 PM 03/27/2001 -0500, you wrote:
    >Has anyone bought a BS2 OEM kit and put it together themselves recently?
    >
    >I sent the following question to parallax last week, but haven't heard
    >back.
    >
    >The kit comes with a 47k Ohm resistor and there is a diagram on the pcb to
    >put the resistor between two of the terminals of the crystal. However,
    >this step is not mentioned in the construction details that came with the
    >kit and I couldn't find any info on their website (their circuit diagrams
    >on the website don't contain the resistor).
    >
    >
    >Does anyone know if I should solder the resistor in place? (The stamp
    >seems to work without it...)
    >
    >Thanks,
    >
    >Nick
    >
    >
    >
    >
    >Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
    >
    >
  • ArchiverArchiver Posts: 46,084
    edited 2001-03-28 01:08
    I just re-read the pdf describing this resistor, and parallax goes out of
    their way to mention that it does not affect BSII modules or OEM BSII's

    because, the resistor is already installed.........................

    It should mention, that for the OEM "Kit" it is also necessary. It does
    suggest a 10K resistor across the oscillator pins, not a 47K ???????????????







    At 05:59 PM 03/27/2001 -0600, you wrote:
    >Hi Nick,
    >
    >I believe the resistor should be used, It's a new item because the the
    >stamp is using a new Interpreter chip which is slightly different
    >electrically.
    >
    >You can find additional info under the what's new section at parallax
    >
    >then download the following pdf
    >
    >"Notice of Change in BS2 Interpreter Chip Hardware"
    >
    >It should mention this additional resistor
    >
    >good luck,
    >'
    >Steve
    >
    >
    >
    >
    >
    >At 04:37 PM 03/27/2001 -0500, you wrote:
    >>Has anyone bought a BS2 OEM kit and put it together themselves recently?
    >>
    >>I sent the following question to parallax last week, but haven't heard
    >>back.
    >>
    >>The kit comes with a 47k Ohm resistor and there is a diagram on the pcb to
    >>put the resistor between two of the terminals of the crystal. However,
    >>this step is not mentioned in the construction details that came with the
    >>kit and I couldn't find any info on their website (their circuit diagrams
    >>on the website don't contain the resistor).
    >>
    >>
    >>Does anyone know if I should solder the resistor in place? (The stamp
    >>seems to work without it...)
    >>
    >>Thanks,
    >>
    >>Nick
    >>
    >>
    >>
    >>
    >>Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
    >>
    >>
    >
    >
    >
    >Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
    >
    >
  • ArchiverArchiver Posts: 46,084
    edited 2001-03-28 01:27
    Nick
    I bought the same kit and soldered the 47K in place. The Stamp works fine.

    Sean

    Original Message
    From: "Nicholas Judson" <judson@f...>
    To: <basicstamps@yahoogroups.com>
    Sent: Tuesday, March 27, 2001 4:37 PM
    Subject: [noparse][[/noparse]basicstamps] BS2 OEM kit question


    > Has anyone bought a BS2 OEM kit and put it together themselves recently?
    >
    > I sent the following question to parallax last week, but haven't heard
    > back.
    >
    > The kit comes with a 47k Ohm resistor and there is a diagram on the pcb to
    > put the resistor between two of the terminals of the crystal. However,
    > this step is not mentioned in the construction details that came with the
    > kit and I couldn't find any info on their website (their circuit diagrams
    > on the website don't contain the resistor).
    >
    >
    > Does anyone know if I should solder the resistor in place? (The stamp
    > seems to work without it...)
    >
    > Thanks,
    >
    > Nick
    >
    >
    >
    >
    > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
    >
    >
  • ArchiverArchiver Posts: 46,084
    edited 2001-03-29 00:13
    The assembly was very easy. The pcb is well marked. It took a total of
    about an hour to put all the components in (then it took about half an
    hour to figure out the I had to use my COM1 port, not COM2 - I still
    haven't figured out why).

    I bought the OEM kit to save money and to have the fun of putting it all
    together. I also don't have/ haven't made a carrier board for the BS2 IC,
    and the OEM provides a DB9 input/ voltage regulator and I didn't feel
    like shelling out the extra money without knowing if the stamp would be
    useful. It is indeed useful and I have had a lot of fun since I got
    it (although I haven't programmed in BASIC since the mid-eighties...).

    Now to get my little robot to go speeding around the apartment...

    Nick

    On Tue, 27 Mar 2001, Rodent wrote:
    >
    > By the way, how did the assembly go? Does it look like its worth the money?
    >
    > I'm not worried about space, so I thought about using an OEM BS2 for some
    > stuff on the robot due to the lower cost.
    >
    >
    Original Message
    >
    >
    > > Has anyone bought a BS2 OEM kit and put it together themselves recently?
    > >
    > > I sent the following question to parallax last week, but haven't heard
    > > back.
    > >
    > > The kit comes with a 47k Ohm resistor and there is a diagram on the pcb to
    > > put the resistor between two of the terminals of the crystal. However,
    > > this step is not mentioned in the construction details that came with the
    > > kit and I couldn't find any info on their website (their circuit diagrams
    > > on the website don't contain the resistor).
    > >
    > >
    > > Does anyone know if I should solder the resistor in place? (The stamp
    > > seems to work without it...)
  • ArchiverArchiver Posts: 46,084
    edited 2001-03-29 02:26
    Sounds cool. I just mounted my ultrasonic sensor and wrote some simple code
    to avoid walls -- pretty interesting. Next I do the servos and IR ranging
    modules.

    Original Message


    > The assembly was very easy. The pcb is well marked. It took a total of
    > about an hour to put all the components in (then it took about half an
    > hour to figure out the I had to use my COM1 port, not COM2 - I still
    > haven't figured out why).
    >
    > I bought the OEM kit to save money and to have the fun of putting it all
    > together. I also don't have/ haven't made a carrier board for the BS2 IC,
    > and the OEM provides a DB9 input/ voltage regulator and I didn't feel
    > like shelling out the extra money without knowing if the stamp would be
    > useful. It is indeed useful and I have had a lot of fun since I got
    > it (although I haven't programmed in BASIC since the mid-eighties...).
    >
    > Now to get my little robot to go speeding around the apartment...
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