LCD Displays
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I have some LCD Displays for sale on eBay at
http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=295358876
thanks
http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=295358876
thanks
Comments
They'd have to start at about 10 cents to make it worthwhile.
BG Micro has units for about $2 and some awesome 2x40 for about
$8. That's like auctioning envelopes on ebay.
DLC
> John Ruddock wrote:
>
> I have some LCD Displays for sale on eBay at
> http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=295358876
> thanks
>
> eGroups.com Home: http://www.egroups.com/group/basicstamps
> www.egroups.com - Simplifying group communications
--
Dennis Clark http://www.verinet.com/~dlc
dlc@v...
I want to use a small, low power display with a Stamp that will fit in a
small enclosure and be wearable.
That means battery power. The larger the battery, the less wearable the end
result will be.
I removed a small (5/8 x 1 1/4 in.) LCD from one of those disposable 1.5V
button battery hospital thermometers, only to find that
the controller is buried under an adhesive on the underside of the board
(looks like a hybrid) and the LCD has the typical laminated conductive foam
connector at only one edge of the glass assembly. I count 16 terminations to
the board, which has me thinking that this thing may yet work for me.
Has anyone played with one of these little LCD's and might perhaps have some
advice for me?
Chris
http://www.seetron.com
They are very easy to use with Basic Stamp.
John
Original Message
From: Chris Loiacono (E-mail) <chris01@t...>
To: Basicstamps Group (E-mail) <basicstamps@yahoogroups.com>
Sent: Saturday, December 08, 2001 4:16 AM
Subject: [noparse][[/noparse]basicstamps] LCD displays
> It's Friday, so I'm working on a hobby project this afternoon:
>
> I want to use a small, low power display with a Stamp that will fit in a
> small enclosure and be wearable.
> That means battery power. The larger the battery, the less wearable the
end
> result will be.
> I removed a small (5/8 x 1 1/4 in.) LCD from one of those disposable 1.5V
> button battery hospital thermometers, only to find that
> the controller is buried under an adhesive on the underside of the board
> (looks like a hybrid) and the LCD has the typical laminated conductive
foam
> connector at only one edge of the glass assembly. I count 16 terminations
to
> the board, which has me thinking that this thing may yet work for me.
> Has anyone played with one of these little LCD's and might perhaps have
some
> advice for me?
>
> Chris
>
>
> 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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>small enclosure and be wearable.
>That means battery power. The larger the battery, the less wearable the end
>result will be.
>I removed a small (5/8 x 1 1/4 in.) LCD from one of those disposable 1.5V
>button battery hospital thermometers, only to find that
>the controller is buried under an adhesive on the underside of the board
>(looks like a hybrid) and the LCD has the typical laminated conductive foam
>connector at only one edge of the glass assembly. I count 16 terminations to
>the board, which has me thinking that this thing may yet work for me.
>Has anyone played with one of these little LCD's and might perhaps have some
>advice for me?
>
>Chris
Hi Chris,
The development kit for the MSP430F110 microcontroller from TI has a
great little micropower LCD screen, and it is supposedly available
from TI separately as part #T218010. It is something I've been
meaning to pursue, but have never gotten around to it. If you want to
look into it (and let me know what you find out!), their phone # for
the development kit ordering is (800) 477-8924, Ext. 5801. I think
the LCD would require a driver circuit, which on the TI development
kit would be a micropower MSP430.
Those little displays keep alive with just a couple of microamps of
current, as opposed to th milliamps gobbled by displays based on
HD44780 drivers.
-- regards,
Tracy Allen
electronically monitored ecosystems
mailto:tracy@e...
http://www.emesystems.com
battery life of two years and was able to get it with the TI part and the
display! I was never able to get the display from TI though, and actually had
to purchase a custom from Hantronix. The price was actually very reasonable
($200 NRE which included 10 displays). The TI micro that is mentioned is an
extremely low power device but requires assembly language programming, so be
prepared for this type of development. As you noted, the display is just the
"glass" and has no driver, so the TI micro has to provide all the required
timing and driving signals. You won't be able to use it like any of the
parallel or serial units described in any of the STAMP literature. The TI
unit is a wonderful part and boasts the lowest operating power I have ever
seen.
Thanks - exactly what I've been looking for. I'll give TI a call on Monday.
They do say the display is available in a list of FAQ's for the controller
family. It would be great if I could make the LCD work. As with most of my
simple projects, I am prototyping with a Stamp, and will move it over to a
PIC in assembly before long (I hope). This LCD may require a PIC to drive
it, but it sounds like it would be worthwhile. A standard 2X16 unit has
determined the size of my proto enclosure. A 6V "J" battery adds 50% more
volume to the enclosure, which is already larger than was originally
desired. OK for a proto, but.... I'm still working out how I'm going to do
an analog pressure reading of 0-3500 psi in this little
handheld.....Commercial transducers are much larger than I want the whole
assembly to be, so I have a little work to do yet there also. Perhaps hoping
to get this one completed this year is a bit too ambitious.
Thanks again,
Chris
>
Original Message
> From: Tracy Allen [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=UDyfsXggzVl20xDEymUkykv4KryDzlanVoSBEuCp1-ZpZSNjUpDHbZuKwvPn7rCnpecIdMz37GKWENjFONQ]tracy@e...[/url
> Sent: Saturday, December 08, 2001 1:52 PM
> To: basicstamps@yahoogroups.com
> Subject: Re: [noparse][[/noparse]basicstamps] LCD displays
>
>
> >I want to use a small, low power display with a Stamp that
> will fit in a
> >small enclosure and be wearable.
> >That means battery power. The larger the battery, the less
> wearable the end
> >result will be.
> >I removed a small (5/8 x 1 1/4 in.) LCD from one of those
> disposable 1.5V
> >button battery hospital thermometers, only to find that
> >the controller is buried under an adhesive on the underside
> of the board
> >(looks like a hybrid) and the LCD has the typical laminated
> conductive foam
> >connector at only one edge of the glass assembly. I count 16
> terminations to
> >the board, which has me thinking that this thing may yet work for me.
> >Has anyone played with one of these little LCD's and might
> perhaps have some
> >advice for me?
> >
> >Chris
>
> Hi Chris,
>
> The development kit for the MSP430F110 microcontroller from TI has a
> great little micropower LCD screen, and it is supposedly available
> from TI separately as part #T218010. It is something I've been
> meaning to pursue, but have never gotten around to it. If you want to
> look into it (and let me know what you find out!), their phone # for
> the development kit ordering is (800) 477-8924, Ext. 5801. I think
> the LCD would require a driver circuit, which on the TI development
> kit would be a micropower MSP430.
>
> Those little displays keep alive with just a couple of microamps of
> current, as opposed to th milliamps gobbled by displays based on
> HD44780 drivers.
>
> -- regards,
> Tracy Allen
> electronically monitored ecosystems
> mailto:tracy@e...
> http://www.emesystems.com
>
>
> 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/
>
>
I took another look at the LCD that is mounted on the starter kit for
the MSP430C325. You can see a diagram of the LCD by downloading the
starter kit experiments manual, which you can find on the TI site
with a search for "slaa079.pdf". The LCD has 8 characters, 7 or 8
segments each. The LCD itself has 20 pins, of which 4 are "commons"
and 14 are segment drivers. Those are connected to 18 pins on the
MSP430C325 microcontroller, which contains an LCD driver "peripheral"
that handles all the timing required to drive the segments and the
commons in proper phase with an AC waveform. This is what is called
a 4-phase LCD. The LCD protocol is described in detail in the MSP430
user guides, which are to be found at:
http://www.ti.com/sc/msp430
Click on the link to "user guides". The protocol is quite demanding,
and remarkably the MSP430 manages to keep the LCD alive and
displaying data with only 2 microamps total current consumption! It
would be nice to have this as a "backback" or integrated low power
display like Scott Edwards' products. The newer members of the
msp430 family are flash based, and either hardware or software uarts
can operate at micropower levels. But working with the 64-pin QFP
package is not hobby material!
azeasi wrote:
>I was never able to get the display from TI though, and actually had
>to purchase a custom from Hantronix. The price was actually very reasonable
>($200 NRE which included 10 displays).
Ahhh--interesting. Were those 7 segment, or dot matrix displays?
I took a look at the Hantronix web site and it seems like their
standard offerings are character or graphic displays that use
standard control chips that draw 350 microamps and up to keep the
display alive.
I agree that the MSP430 is a remarkable processor, especially the
clock system that is digitally locked to a base 32khz crystal, and
allows response latency from sleep on only 8 microseconds. I also
have an MSP430F112 evaluation kit, which uses the low end flash part
which comes in a 20-pin SOIC package. (No LCD driver circuits in
that one) I have plans for it as a BS2 "peripheral", but haven't
gotten around to it. (So much to do, so little time!)
-- regards,
Tracy Allen
electronically monitored ecosystems
mailto:tracy@e...
http://www.emesystems.com
>Tracy:
>
>Thanks - exactly what I've been looking for. I'll give TI a call on Monday.
>They do say the display is available in a list of FAQ's for the controller
>family. It would be great if I could make the LCD work. As with most of my
>simple projects, I am prototyping with a Stamp, and will move it over to a
>PIC in assembly before long (I hope). This LCD may require a PIC to drive
>it, but it sounds like it would be worthwhile. A standard 2X16 unit has
>determined the size of my proto enclosure. A 6V "J" battery adds 50% more
>volume to the enclosure, which is already larger than was originally
>desired. OK for a proto, but.... I'm still working out how I'm going to do
>an analog pressure reading of 0-3500 psi in this little
>handheld.....Commercial transducers are much larger than I want the whole
>assembly to be, so I have a little work to do yet there also. Perhaps hoping
>to get this one completed this year is a bit too ambitious.
>
>Thanks again,
>Chris
At 4:55 PM -0500 12/8/01, azeasi@a... wrote:
>I have used the TI system with the display you are talking about. I needed
>battery life of two years and was able to get it with the TI part and the
>display! I was never able to get the display from TI though, and actually had
>to purchase a custom from Hantronix. The price was actually very reasonable
>($200 NRE which included 10 displays). The TI micro that is mentioned is an
>extremely low power device but requires assembly language programming, so be
>prepared for this type of development. As you noted, the display is just the
>"glass" and has no driver, so the TI micro has to provide all the required
>timing and driving signals. You won't be able to use it like any of the
>parallel or serial units described in any of the STAMP literature. The TI
>unit is a wonderful part and boasts the lowest operating power I have ever
>seen.
Original Message
> From: Chris Loiacono [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=6oTnobKaqpV1xxoSRRrUoHczrnh1xq8kr9p9NDArNKCS-rAbZ83lRiANqldKW6zhS1_tbYIkce7cmed8Bg]chris@m...[/url
> Sent: Monday, December 10, 2001 12:39 AM
> To: 'basicstamps@yahoogroups.com'
> Subject: RE: [noparse][[/noparse]basicstamps] LCD displays
>
>
> Tracy & azeasi@a...:
>
> OK, This is good stuff, and I'm hooked now. If they can
> actually get me stock LCD's I'll be ordering a dev kit
> tomorrow. At the prices they list it can't hurt to add these
> devices to my tool kit. This may fill some gaps for me in
> projects that are waiting for PIC18 Flash chips that
> Microchip keeps promising samples of, and which never seem to
> arrive, as well as for my 'hobby' project and perhaps a
> backpack type device, and ....etc...etc.... So, what's
> another instruction set and architecture to learn anyway. Do
> you have any experience with part availability on these MSP's?
>
> And, before I forget, Tracy, thanks again for another good tip.
> Chris
>
> >
Original Message
> > From: Tracy Allen [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=YZJhYhLt9M42LLlu5wSveFgXysrO2w38Z9epMrDwJz3qp31RQKOyp2ox22_w3RGRyFlZc4ccJvsLtpPpgKE]tracy@e...[/url
> > Sent: Sunday, December 09, 2001 1:46 PM
> > To: basicstamps@yahoogroups.com
> > Subject: RE: [noparse][[/noparse]basicstamps] LCD displays
> >
> >
> > Hi Chris,
> >
> > I took another look at the LCD that is mounted on the
> starter kit for
> > the MSP430C325. You can see a diagram of the LCD by
> downloading the
> > starter kit experiments manual, which you can find on the TI site
> > with a search for "slaa079.pdf". The LCD has 8 characters, 7 or 8
> > segments each. The LCD itself has 20 pins, of which 4 are
> "commons"
> > and 14 are segment drivers. Those are connected to 18 pins on the
> > MSP430C325 microcontroller, which contains an LCD driver
> "peripheral"
> > that handles all the timing required to drive the segments and the
> > commons in proper phase with an AC waveform. This is what
> is called
> > a 4-phase LCD. The LCD protocol is described in detail in
> the MSP430
> > user guides, which are to be found at:
> >
> > http://www.ti.com/sc/msp430
> >
> > Click on the link to "user guides". The protocol is quite
> demanding,
> > and remarkably the MSP430 manages to keep the LCD alive and
> > displaying data with only 2 microamps total current
> consumption! It
> > would be nice to have this as a "backback" or integrated low power
> > display like Scott Edwards' products. The newer members of the
> > msp430 family are flash based, and either hardware or
> software uarts
> > can operate at micropower levels. But working with the 64-pin QFP
> > package is not hobby material!
> >
> > azeasi wrote:
> > >I was never able to get the display from TI though, and
> actually had
> > >to purchase a custom from Hantronix. The price was actually
> > very reasonable
> > >($200 NRE which included 10 displays).
> >
> > Ahhh--interesting. Were those 7 segment, or dot matrix displays?
> > I took a look at the Hantronix web site and it seems like their
> > standard offerings are character or graphic displays that use
> > standard control chips that draw 350 microamps and up to keep the
> > display alive.
> >
> > I agree that the MSP430 is a remarkable processor, especially the
> > clock system that is digitally locked to a base 32khz crystal, and
> > allows response latency from sleep on only 8 microseconds. I also
> > have an MSP430F112 evaluation kit, which uses the low end
> flash part
> > which comes in a 20-pin SOIC package. (No LCD driver circuits in
> > that one) I have plans for it as a BS2 "peripheral", but haven't
> > gotten around to it. (So much to do, so little time!)
> >
> > -- regards,
> > Tracy Allen
> > electronically monitored ecosystems
> > mailto:tracy@e...
> > http://www.emesystems.com
> >
> >
> >
> > >Tracy:
> > >
> > >Thanks - exactly what I've been looking for. I'll give TI a
> > call on Monday.
> > >They do say the display is available in a list of FAQ's for
> > the controller
> > >family. It would be great if I could make the LCD work. As
> > with most of my
> > >simple projects, I am prototyping with a Stamp, and will
> > move it over to a
> > >PIC in assembly before long (I hope). This LCD may require a
> > PIC to drive
> > >it, but it sounds like it would be worthwhile. A standard
> > 2X16 unit has
> > >determined the size of my proto enclosure. A 6V "J" battery
> > adds 50% more
> > >volume to the enclosure, which is already larger than was
> originally
> > >desired. OK for a proto, but.... I'm still working out how
> > I'm going to do
> > >an analog pressure reading of 0-3500 psi in this little
> > >handheld.....Commercial transducers are much larger than I
> > want the whole
> > >assembly to be, so I have a little work to do yet there
> > also. Perhaps hoping
> > >to get this one completed this year is a bit too ambitious.
> > >
> > >Thanks again,
> > >Chris
> >
> >
> > At 4:55 PM -0500 12/8/01, azeasi@a... wrote:
> > >I have used the TI system with the display you are talking
> > about. I needed
> > >battery life of two years and was able to get it with the TI
> > part and the
> > >display! I was never able to get the display from TI though,
> > and actually had
> > >to purchase a custom from Hantronix. The price was actually
> > very reasonable
> > >($200 NRE which included 10 displays). The TI micro that is
> > mentioned is an
> > >extremely low power device but requires assembly language
> > programming, so be
> > >prepared for this type of development. As you noted, the
> > display is just the
> > >"glass" and has no driver, so the TI micro has to provide
> > all the required
> > >timing and driving signals. You won't be able to use it like
> > any of the
> > >parallel or serial units described in any of the STAMP
> > literature. The TI
> > >unit is a wonderful part and boasts the lowest operating
> > power I have ever
> > >seen.
> >
> >
> > 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/
> >
> >
>
I looked into the TI MSP430 family further, and found that only the hi-end
dev kits contain the LCD. Then after more searching and asking I was told
that the LCD part is only available in Asia. This is starting to sound like
a PIC16 and a small standard LCD. My next option is to have a custom LCD
done and sell the resulting product.....Which started as a weekend hobby
item.
Learning the TI ultra-low-power microcontrollers may not be a bad thing,
though. Decisions, decisions...
It's all starting to blend together....work, play...work, play.....play,
work....work, work...uh...er..
Chris
>
Original Message
> From: Tracy Allen [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=EC9oCSffpfuLs1__puEsVu-gHNLox3i0qbHjvdHGOuvBkuD7CguMesGRgtA1njhp9fwZVau7J-FHXk4]tracy@e...[/url
> Sent: Saturday, December 08, 2001 1:52 PM
> To: basicstamps@yahoogroups.com
> Subject: Re: [noparse][[/noparse]basicstamps] LCD displays
>
>
> >I want to use a small, low power display with a Stamp that
> will fit in a
> >small enclosure and be wearable.
> >That means battery power. The larger the battery, the less
> wearable the end
> >result will be.
> >I removed a small (5/8 x 1 1/4 in.) LCD from one of those
> disposable 1.5V
> >button battery hospital thermometers, only to find that
> >the controller is buried under an adhesive on the underside
> of the board
> >(looks like a hybrid) and the LCD has the typical laminated
> conductive foam
> >connector at only one edge of the glass assembly. I count 16
> terminations to
> >the board, which has me thinking that this thing may yet work for me.
> >Has anyone played with one of these little LCD's and might
> perhaps have some
> >advice for me?
> >
> >Chris
>
> Hi Chris,
>
> The development kit for the MSP430F110 microcontroller from TI has a
> great little micropower LCD screen, and it is supposedly available
> from TI separately as part #T218010. It is something I've been
> meaning to pursue, but have never gotten around to it. If you want to
> look into it (and let me know what you find out!), their phone # for
> the development kit ordering is (800) 477-8924, Ext. 5801. I think
> the LCD would require a driver circuit, which on the TI development
> kit would be a micropower MSP430.
>
> Those little displays keep alive with just a couple of microamps of
> current, as opposed to th milliamps gobbled by displays based on
> HD44780 drivers.
>
> -- regards,
> Tracy Allen
> electronically monitored ecosystems
> mailto:tracy@e...
> http://www.emesystems.com
>
>
> 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/
>
>
do what we have to do!