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?
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
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?
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/
--- 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/
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/
--- 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/
>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
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