Large LED display sucess!
Archiver
Posts: 46,084
After long period of trying to get large 5" LED displays to work
with a BS2, I finally go it.
Initially I tried to get things to work with MAX7219 along with some
source driver and sinks but that never worked for reasons unkown.
My solution was to use a UCN8318 which is a 32 channel serial in -
shift out chip that can handle up to 300mA/channel and easy to
cascade. Each chip can control 4 of these 7-segment displays. For
that matter, they provide enough current to drive relays, buzzers
etc. Also they can handle output voltages up to 50VDC.
My thanks are for many in this group who helped - especially Jon
Williams.
If anyone looking for my answer, I can give you the schematics,
expressPCB file if you wish to get it made and also the test code
that I wrote for it.
Al Najjar
with a BS2, I finally go it.
Initially I tried to get things to work with MAX7219 along with some
source driver and sinks but that never worked for reasons unkown.
My solution was to use a UCN8318 which is a 32 channel serial in -
shift out chip that can handle up to 300mA/channel and easy to
cascade. Each chip can control 4 of these 7-segment displays. For
that matter, they provide enough current to drive relays, buzzers
etc. Also they can handle output voltages up to 50VDC.
My thanks are for many in this group who helped - especially Jon
Williams.
If anyone looking for my answer, I can give you the schematics,
expressPCB file if you wish to get it made and also the test code
that I wrote for it.
Al Najjar
Comments
Sounds great. would like the information
mailto[noparse]:email:[/noparse] memelectronics@e...
mike m
Original Message
From: brownstamp <brownstamp@y...>
To: <basicstamps@yahoogroups.com>
Sent: Saturday, July 13, 2002 4:28 PM
Subject: [noparse][[/noparse]basicstamps] Large LED display sucess!
> After long period of trying to get large 5" LED displays to work
> with a BS2, I finally go it.
>
> Initially I tried to get things to work with MAX7219 along with some
> source driver and sinks but that never worked for reasons unkown.
>
> My solution was to use a UCN8318 which is a 32 channel serial in -
> shift out chip that can handle up to 300mA/channel and easy to
> cascade. Each chip can control 4 of these 7-segment displays. For
> that matter, they provide enough current to drive relays, buzzers
> etc. Also they can handle output voltages up to 50VDC.
>
> My thanks are for many in this group who helped - especially Jon
> Williams.
>
> If anyone looking for my answer, I can give you the schematics,
> expressPCB file if you wish to get it made and also the test code
> that I wrote for it.
>
> Al Najjar
>
>
> 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/
>
>
>
searched Newark and Kameco and coudn't find it. Seems like a way to reduce
chip count of 595's and still get the sink capability'
Eric Adams
E-Mail hugs102@h...
Original Message
From: "brownstamp" <brownstamp@y...>
To: <basicstamps@yahoogroups.com>
Sent: Saturday, July 13, 2002 4:28 PM
Subject: [noparse][[/noparse]basicstamps] Large LED display sucess!
> After long period of trying to get large 5" LED displays to work
> with a BS2, I finally go it.
>
> Initially I tried to get things to work with MAX7219 along with some
> source driver and sinks but that never worked for reasons unkown.
>
> My solution was to use a UCN8318 which is a 32 channel serial in -
> shift out chip that can handle up to 300mA/channel and easy to
> cascade. Each chip can control 4 of these 7-segment displays. For
> that matter, they provide enough current to drive relays, buzzers
> etc. Also they can handle output voltages up to 50VDC.
>
> My thanks are for many in this group who helped - especially Jon
> Williams.
>
> If anyone looking for my answer, I can give you the schematics,
> expressPCB file if you wish to get it made and also the test code
> that I wrote for it.
>
> Al Najjar
>
>
> 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/
>
>
The part number quoted below, is made by Allegro. Not every reseller
carries that product line. You can get limited sample quantities direct
from their web site. For that you'd need to search the web for it. And
the quoted application, is practically what it was designed for.
Gregg C Levine hansolofalcon@w...
"The Force will be with you...Always." Obi-Wan Kenobi
"Use the Force, Luke."· Obi-Wan Kenobi
(This company dedicates this E-Mail to General Obi-Wan Kenobi )
(This company dedicates this E-Mail to Master Yoda )
>
Original Message
> From: Eric Adams [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=cdpxPPN7ns8PHY0CWKPURnB41em60zs7S1irykMK4V968M5MXOPZtlwIj7Fr_PZII4zV9yz3EoyHK4bbpenOVg]hugs102@b...[/url
> Sent: Saturday, July 13, 2002 8:53 PM
> To: basicstamps@yahoogroups.com
> Subject: Re: [noparse][[/noparse]basicstamps] Large LED display sucess!
>
> I would be interested in your information and files. Who makes the IC
? I
> searched Newark and Kameco and coudn't find it. Seems like a way to
reduce
> chip count of 595's and still get the sink capability'
>
> Eric Adams
> E-Mail hugs102@h...
>
>
>
Original Message
> From: "brownstamp" <brownstamp@y...>
> To: <basicstamps@yahoogroups.com>
> Sent: Saturday, July 13, 2002 4:28 PM
> Subject: [noparse][[/noparse]basicstamps] Large LED display sucess!
>
>
> > After long period of trying to get large 5" LED displays to work
> > with a BS2, I finally go it.
> >
> > Initially I tried to get things to work with MAX7219 along with some
> > source driver and sinks but that never worked for reasons unkown.
> >
> > My solution was to use a UCN8318 which is a 32 channel serial in -
> > shift out chip that can handle up to 300mA/channel and easy to
> > cascade. Each chip can control 4 of these 7-segment displays. For
> > that matter, they provide enough current to drive relays, buzzers
> > etc. Also they can handle output voltages up to 50VDC.
> >
> > My thanks are for many in this group who helped - especially Jon
> > Williams.
> >
> > If anyone looking for my answer, I can give you the schematics,
> > expressPCB file if you wish to get it made and also the test code
> > that I wrote for it.
> >
> > Al Najjar
> >
to get all the files cleaned up and should post them Monday or
Tuesday of this week.
The 595 is great but you are correct about chip count. also the
5818 can handle up to 60V at 300mA/channel loads which is not the
case with the 595 which can only handle I think up to 6.
Al
--- In basicstamps@y..., "Eric Adams" <hugs102@b...> wrote:
> I would be interested in your information and files. Who makes
the IC ? I
> searched Newark and Kameco and coudn't find it. Seems like a way
to reduce
> chip count of 595's and still get the sink capability'
>
> Eric Adams
> E-Mail hugs102@h...
>
>
>
Original Message
> From: "brownstamp" <brownstamp@y...>
> To: <basicstamps@y...>
> Sent: Saturday, July 13, 2002 4:28 PM
> Subject: [noparse][[/noparse]basicstamps] Large LED display sucess!
>
>
> > After long period of trying to get large 5" LED displays to work
> > with a BS2, I finally go it.
> >
> > Initially I tried to get things to work with MAX7219 along with
some
> > source driver and sinks but that never worked for reasons unkown.
> >
> > My solution was to use a UCN8318 which is a 32 channel serial
in -
> > shift out chip that can handle up to 300mA/channel and easy to
> > cascade. Each chip can control 4 of these 7-segment displays.
For
> > that matter, they provide enough current to drive relays, buzzers
> > etc. Also they can handle output voltages up to 50VDC.
> >
> > My thanks are for many in this group who helped - especially Jon
> > Williams.
> >
> > If anyone looking for my answer, I can give you the schematics,
> > expressPCB file if you wish to get it made and also the test code
> > that I wrote for it.
> >
> > Al Najjar
> >
> >
> > 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/
> >
> >
About the part number, and name of manufacturer, that's what I posted
earlier, but I could not remember the web site. And once I get my
problems with my own stamp device, I'd also be interested in seeing
this.
Gregg C Levine hansolofalcon@w...
"The Force will be with you...Always." Obi-Wan Kenobi
"Use the Force, Luke."· Obi-Wan Kenobi
(This company dedicates this E-Mail to General Obi-Wan Kenobi )
(This company dedicates this E-Mail to Master Yoda )
>
Original Message
> From: brownstamp [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=N5lSXFUfDyTnQNji6T9R3370Ahehgb-DctF9ECignys2EdjtZFwzHhErcndzjijNwYKMeUBMQPTBMA]brownstamp@y...[/url
> Sent: Sunday, July 14, 2002 4:01 PM
> To: basicstamps@yahoogroups.com
> Subject: [noparse][[/noparse]basicstamps] Re: Large LED display sucess!
>
>
> the IC is by Allegro (www.allegromicro.com/sf/5818/). I am working
> to get all the files cleaned up and should post them Monday or
> Tuesday of this week.
>
> The 595 is great but you are correct about chip count. also the
> 5818 can handle up to 60V at 300mA/channel loads which is not the
> case with the 595 which can only handle I think up to 6.
>
>
> Al
>
>
> --- In basicstamps@y..., "Eric Adams" <hugs102@b...> wrote:
> > I would be interested in your information and files. Who makes
> the IC ? I
> > searched Newark and Kameco and coudn't find it. Seems like a way
> to reduce
> > chip count of 595's and still get the sink capability'
> >
> > Eric Adams
> > E-Mail hugs102@h...
> >
> >
> >
Original Message
> > From: "brownstamp" <brownstamp@y...>
> > To: <basicstamps@y...>
> > Sent: Saturday, July 13, 2002 4:28 PM
> > Subject: [noparse][[/noparse]basicstamps] Large LED display sucess!
> >
> >
> > > After long period of trying to get large 5" LED displays to work
> > > with a BS2, I finally go it.
> > >
> > > Initially I tried to get things to work with MAX7219 along with
> some
> > > source driver and sinks but that never worked for reasons unkown.
> > >
> > > My solution was to use a UCN8318 which is a 32 channel serial
> in -
> > > shift out chip that can handle up to 300mA/channel and easy to
> > > cascade. Each chip can control 4 of these 7-segment displays.
> For
> > > that matter, they provide enough current to drive relays, buzzers
> > > etc. Also they can handle output voltages up to 50VDC.
> > >
> > > My thanks are for many in this group who helped - especially Jon
> > > Williams.
> > >
> > > If anyone looking for my answer, I can give you the schematics,
> > > expressPCB file if you wish to get it made and also the test code
> > > that I wrote for it.
> > >
> > > Al Najjar
> > >
> > >
> > > 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/
> > >
> > >
>
>
> 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/
>
>5818 can handle up to 60V at 300mA/channel loads which is not the
>case with the 595 which can only handle I think up to 6.
>
>
>Al
>
I just noticed that Supertex <http://www.supertex.com/> has some
serial input, parallel output drivers that are capable of up to 300
volts, 300 ma. With sink, source and totem pole drivers up to 40
channels in one chip. I've never tried these parts, but I swear by
the Supertex low threshold mosfets.
-- regards,
Tracy Allen
electronically monitored ecosystems
mailto:tracy@e...
http://www.emesystems.com