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My BS2 is not anymore detected by PC after an overload . . . . . — Parallax Forums

My BS2 is not anymore detected by PC after an overload . . . . .

ArchiverArchiver Posts: 46,084
edited 2002-02-17 23:05 in General Discussion
I connected a >>5 Volts at athe input of the BS2, I think the PIC is
still alive but it is not anymore detected by my PC, I guess the
National IC in the chip is the one broken, can this be still repaired?

Comments

  • ArchiverArchiver Posts: 46,084
    edited 2002-02-16 18:16
    How much greater than, greater than, 5V?
    Original Message
    From: mysemicon2000 [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=GfVl-xLUn4Uvce65U5k3FaNPZra5O-MkubmcHSsKUMbhnRJNSNw2ITc1iWsSbUdIsSBIey5MrXvQP2herb52hJN5kcUPXeM]semiconductor@p...[/url
    Sent: Friday, February 15, 2002 11:59 PM
    To: basicstamps@yahoogroups.com
    Subject: [noparse][[/noparse]basicstamps] My BS2 is not anymore detected by PC after an
    overload . . . . .


    I connected a >>5 Volts at athe input of the BS2, I think the PIC is
    still alive but it is not anymore detected by my PC, I guess the
    National IC in the chip is the one broken, can this be still repaired?


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  • ArchiverArchiver Posts: 46,084
    edited 2002-02-16 23:48
    About 10 V.

    --- In basicstamps@y..., "Chris Loiacono \(E-mail\)" <chris01@t...>
    wrote:
    > How much greater than, greater than, 5V?
    >
    >
    Original Message
    > From: mysemicon2000 [noparse][[/noparse]mailto:semiconductor@p...]
    > Sent: Friday, February 15, 2002 11:59 PM
    > To: basicstamps@y...
    > Subject: [noparse][[/noparse]basicstamps] My BS2 is not anymore detected by PC after an
    > overload . . . . .
    >
    >
    > I connected a >>5 Volts at athe input of the BS2, I think the PIC is
    > still alive but it is not anymore detected by my PC, I guess the
    > National IC in the chip is the one broken, can this be still
    repaired?
    >
    >
    > To UNSUBSCRIBE, just send mail to:
    > basicstamps-unsubscribe@y...
    > 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 2002-02-17 06:16
    I gues it is the LM293 IC that was broken, it changed its colour and
    cannot power up the BS2, btw, what is its function in the BS2 IC?

    --- In basicstamps@y..., "mysemicon2000" <semiconductor@p...> wrote:
    > About 10 V.
    >
    > --- In basicstamps@y..., "Chris Loiacono \(E-mail\)" <chris01@t...>
    > wrote:
    > > How much greater than, greater than, 5V?
    > >
    > >
    Original Message
    > > From: mysemicon2000 [noparse][[/noparse]mailto:semiconductor@p...]
    > > Sent: Friday, February 15, 2002 11:59 PM
    > > To: basicstamps@y...
    > > Subject: [noparse][[/noparse]basicstamps] My BS2 is not anymore detected by PC after
    an
    > > overload . . . . .
    > >
    > >
    > > I connected a >>5 Volts at athe input of the BS2, I think the PIC
    is
    > > still alive but it is not anymore detected by my PC, I guess the
    > > National IC in the chip is the one broken, can this be still
    > repaired?
    > >
    > >
    > > To UNSUBSCRIBE, just send mail to:
    > > basicstamps-unsubscribe@y...
    > > 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 2002-02-17 14:58
    Is the LM293 an OP AMP or Regulator.

    --- In basicstamps@y..., "mysemicon2000" <semiconductor@p...> wrote:
    > I gues it is the LM293 IC that was broken, it changed its colour
    and
    > cannot power up the BS2, btw, what is its function in the BS2 IC?
    >
    > --- In basicstamps@y..., "mysemicon2000" <semiconductor@p...> wrote:
    > > About 10 V.
    > >
    > > --- In basicstamps@y..., "Chris Loiacono \(E-mail\)"
    <chris01@t...>
    > > wrote:
    > > > How much greater than, greater than, 5V?
    > > >
    > > >
    Original Message
    > > > From: mysemicon2000 [noparse][[/noparse]mailto:semiconductor@p...]
    > > > Sent: Friday, February 15, 2002 11:59 PM
    > > > To: basicstamps@y...
    > > > Subject: [noparse][[/noparse]basicstamps] My BS2 is not anymore detected by PC
    after
    > an
    > > > overload . . . . .
    > > >
    > > >
    > > > I connected a >>5 Volts at athe input of the BS2, I think the
    PIC
    > is
    > > > still alive but it is not anymore detected by my PC, I guess the
    > > > National IC in the chip is the one broken, can this be still
    > > repaired?
    > > >
    > > >
    > > > To UNSUBSCRIBE, just send mail to:
    > > > basicstamps-unsubscribe@y...
    > > > 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 2002-02-17 19:42
    >I gues it is the LM293 IC that was broken, it changed its colour and
    >cannot power up the BS2, btw, what is its function in the BS2 IC?
    >..Is the LM293 an OP AMP or Regulator.

    You should find a "6" on there too, it is an LM2936. It is a voltage
    regulator, low power low dropout. It is a jelly-bean part available
    from all the large distributors. If you put the 10 volts at Vin
    (pin 24), what appears on the +5 output (pin 21)? If that is also 10
    volts, the regulator failed as a short circuit and that would not
    bode well at all for the PIC chip. But if it is voltage is zero or
    at least less than 6 volts, then the regulator may have failed as an
    open circuit and you can have more hope that replacing the LM2936 or
    at least bypassing it with another power supply will bring your stamp
    back to life.

    -- Tracy
  • ArchiverArchiver Posts: 46,084
    edited 2002-02-17 23:05
    What must be the output voltage and how will I connect the LM2936?
    Can I use other regulators?

    --- In basicstamps@y..., Tracy Allen <tracy@e...> wrote:
    > >I gues it is the LM293 IC that was broken, it changed its colour
    and
    > >cannot power up the BS2, btw, what is its function in the BS2 IC?
    > >..Is the LM293 an OP AMP or Regulator.
    >
    > You should find a "6" on there too, it is an LM2936. It is a
    voltage
    > regulator, low power low dropout. It is a jelly-bean part
    available
    > from all the large distributors. If you put the 10 volts at Vin
    > (pin 24), what appears on the +5 output (pin 21)? If that is also
    10
    > volts, the regulator failed as a short circuit and that would not
    > bode well at all for the PIC chip. But if it is voltage is zero
    or
    > at least less than 6 volts, then the regulator may have failed as
    an
    > open circuit and you can have more hope that replacing the LM2936
    or
    > at least bypassing it with another power supply will bring your
    stamp
    > back to life.
    >
    > -- Tracy
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