7-segment serial driver
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Posts: 46,084
Hi Folks,
I want to build a display of at least 4 digits for which I want to use
7-segment LEDs. To save pins on my Stamp I would like to use some kind of
serial-to-7-segment-converter, if possible one that can handle four digits.
Any ideas? Thanks in advance, Uli
[noparse][[/noparse]Non-text portions of this message have been removed]
I want to build a display of at least 4 digits for which I want to use
7-segment LEDs. To save pins on my Stamp I would like to use some kind of
serial-to-7-segment-converter, if possible one that can handle four digits.
Any ideas? Thanks in advance, Uli
[noparse][[/noparse]Non-text portions of this message have been removed]
Comments
>Hi Folks,
>
>I want to build a display of at least 4 digits for which I want to use
>7-segment LEDs. To save pins on my Stamp I would like to use some kind of
>serial-to-7-segment-converter, if possible one that can handle four digits.
>
>Any ideas? Thanks in advance, Uli
>
>Uli -
Take a look at the Maxim MAX7219
http://www.maxim-ic.com/quick_view2.cfm/qv_pk/1339
Regards,
Bruce Bates
>[noparse][[/noparse]Non-text portions of this message have been removed]
>
>
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require too many lines, have a look at my 5 digit design which uses a 4094
with each display. The data sheet has a circuit diagram, and software
samples for the stamp.
url is http://www.lennard.net.nz/electronics/led.html
This is for a 5 digit display. For a 4 digit display, just remove one of
the modules.
cheers,
Ben, Wellington, New Zealand.
--
http://www.lennard.net.nz/
Ben Lennard, NCEE, Dip EE
Web Hosting and Electronics R&D
Hm: +64 4 972 7567
Mb: +64 21 536 627
87 Spencer Street
Crofton Downs
Wellington
New Zealand
"To the optimist, the glass is half full. To the pessimist, the glass is
half empty. To the engineer, the glass is twice as big as it needs to be."
No animals were harmed in the transmission of this email, although the
Dog next door is living on borrowed time, let me tell you! Those of you
with an overwhelming fear of the unknown will be gratified to learn that
there is no hidden message revealed by reading this warning backwards.
> From: "ulibasic" <ulibasic@r...>
> Reply-To: basicstamps@yahoogroups.com
> Date: Mon, 19 Aug 2002 10:13:21 +0200
> To: <basicstamps@yahoogroups.com>
> Subject: [noparse][[/noparse]basicstamps] 7-segment serial driver
>
> Hi Folks,
>
> I want to build a display of at least 4 digits for which I want to use
> 7-segment LEDs. To save pins on my Stamp I would like to use some kind of
> serial-to-7-segment-converter, if possible one that can handle four digits.
>
> Any ideas? Thanks in advance, Uli
>
>
> [noparse][[/noparse]Non-text portions of this message have been removed]
>
>
> 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 have an LCD from Optrex
http://www.optrex.com/ProductList.asp?PartNumber=DMC%2D40218%2A
DMC-40218
Can you ,Ben, or anyone else give me advice to connect this module to the
BS2.
Thanks in advance
Johan
Original Message
From: "Ben" <ben@l...>
To: <basicstamps@yahoogroups.com>
Sent: Monday, August 19, 2002 11:35 PM
Subject: Re: [noparse][[/noparse]basicstamps] 7-segment serial driver
> There is the Max IC, or, if you want to build up a module that doesn't
> require too many lines, have a look at my 5 digit design which uses a 4094
> with each display. The data sheet has a circuit diagram, and software
> samples for the stamp.
>
> url is http://www.lennard.net.nz/electronics/led.html
>
> This is for a 5 digit display. For a 4 digit display, just remove one of
> the modules.
>
> cheers,
>
> Ben, Wellington, New Zealand.
>
> --
> http://www.lennard.net.nz/
> Ben Lennard, NCEE, Dip EE
>
> Web Hosting and Electronics R&D
>
> Hm: +64 4 972 7567
> Mb: +64 21 536 627
> 87 Spencer Street
> Crofton Downs
> Wellington
> New Zealand
>
> "To the optimist, the glass is half full. To the pessimist, the glass is
> half empty. To the engineer, the glass is twice as big as it needs to
be."
>
> No animals were harmed in the transmission of this email, although the
> Dog next door is living on borrowed time, let me tell you! Those of you
> with an overwhelming fear of the unknown will be gratified to learn that
> there is no hidden message revealed by reading this warning backwards.
>
>
>
>
> > From: "ulibasic" <ulibasic@r...>
> > Reply-To: basicstamps@yahoogroups.com
> > Date: Mon, 19 Aug 2002 10:13:21 +0200
> > To: <basicstamps@yahoogroups.com>
> > Subject: [noparse][[/noparse]basicstamps] 7-segment serial driver
> >
> > Hi Folks,
> >
> > I want to build a display of at least 4 digits for which I want to use
> > 7-segment LEDs. To save pins on my Stamp I would like to use some kind
of
> > serial-to-7-segment-converter, if possible one that can handle four
digits.
> >
> > Any ideas? Thanks in advance, Uli
> >
> >
> > [noparse][[/noparse]Non-text portions of this message have been removed]
> >
> >
> > 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/
> >
> >
>
>
> 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/
>
>
>
This module is based on the Hitachi Chipset, so there are at least 3 places
you can get info:
My site: http://www.lennard.net.nz/electronics/lcd.html (I've changed the
code recently - optimised it, but the examples do work and will get you
started).
Or, this site (which is where I went to get the ideas on my site to work):
http://home.iae.nl/users/pouweha/lcd/lcd0.shtml
Or Jon William's Nuts and Volts article (can't remember the url, but Jon
could point you in the right direction).
Cheers,
Ben.
> From: "Johan" <johan.v@p...>
> Reply-To: basicstamps@yahoogroups.com
> Date: Tue, 20 Aug 2002 12:02:00 +0200
> To: <basicstamps@yahoogroups.com>
> Subject: Re: [noparse][[/noparse]basicstamps] 7-segment serial driver
>
> Hello,
> I have an LCD from Optrex
> http://www.optrex.com/ProductList.asp?PartNumber=DMC%2D40218%2A
> DMC-40218
> Can you ,Ben, or anyone else give me advice to connect this module to the
> BS2.
> Thanks in advance
> Johan
>
Original Message
> From: "Ben" <ben@l...>
> To: <basicstamps@yahoogroups.com>
> Sent: Monday, August 19, 2002 11:35 PM
> Subject: Re: [noparse][[/noparse]basicstamps] 7-segment serial driver
>
>
>> There is the Max IC, or, if you want to build up a module that doesn't
>> require too many lines, have a look at my 5 digit design which uses a 4094
>> with each display. The data sheet has a circuit diagram, and software
>> samples for the stamp.
>>
>> url is http://www.lennard.net.nz/electronics/led.html
>>
>> This is for a 5 digit display. For a 4 digit display, just remove one of
>> the modules.
>>
>> cheers,
>>
>> Ben, Wellington, New Zealand.
>>
>> --
>> http://www.lennard.net.nz/
>> Ben Lennard, NCEE, Dip EE
>>
>> Web Hosting and Electronics R&D
>>
>> Hm: +64 4 972 7567
>> Mb: +64 21 536 627
>> 87 Spencer Street
>> Crofton Downs
>> Wellington
>> New Zealand
>>
>> "To the optimist, the glass is half full. To the pessimist, the glass is
>> half empty. To the engineer, the glass is twice as big as it needs to
> be."
>>
>> No animals were harmed in the transmission of this email, although the
>> Dog next door is living on borrowed time, let me tell you! Those of you
>> with an overwhelming fear of the unknown will be gratified to learn that
>> there is no hidden message revealed by reading this warning backwards.
>>
>>
>>
>>
>>> From: "ulibasic" <ulibasic@r...>
>>> Reply-To: basicstamps@yahoogroups.com
>>> Date: Mon, 19 Aug 2002 10:13:21 +0200
>>> To: <basicstamps@yahoogroups.com>
>>> Subject: [noparse][[/noparse]basicstamps] 7-segment serial driver
>>>
>>> Hi Folks,
>>>
>>> I want to build a display of at least 4 digits for which I want to use
>>> 7-segment LEDs. To save pins on my Stamp I would like to use some kind
> of
>>> serial-to-7-segment-converter, if possible one that can handle four
> digits.
>>>
>>> Any ideas? Thanks in advance, Uli
>>>
>>>
>>> [noparse][[/noparse]Non-text portions of this message have been removed]
>>>
>>>
>>> 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/
>>>
>>>
>>
>>
>> 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/
>>
>>
>>
>
>
> 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/
>
>
Johan
Original Message
From: "Ben" <ben@l...>
To: <basicstamps@yahoogroups.com>
Sent: Tuesday, August 20, 2002 11:22 PM
Subject: Re: [noparse][[/noparse]basicstamps] 7-segment serial driver
> Hi Johan,
>
> This module is based on the Hitachi Chipset, so there are at least 3
places
> you can get info:
>
> My site: http://www.lennard.net.nz/electronics/lcd.html (I've changed
the
> code recently - optimised it, but the examples do work and will get you
> started).
> Or, this site (which is where I went to get the ideas on my site to
work):
> http://home.iae.nl/users/pouweha/lcd/lcd0.shtml
> Or Jon William's Nuts and Volts article (can't remember the url, but Jon
> could point you in the right direction).
>
> Cheers,
>
>
> Ben.
>
>
> > From: "Johan" <johan.v@p...>
> > Reply-To: basicstamps@yahoogroups.com
> > Date: Tue, 20 Aug 2002 12:02:00 +0200
> > To: <basicstamps@yahoogroups.com>
> > Subject: Re: [noparse][[/noparse]basicstamps] 7-segment serial driver
> >
> > Hello,
> > I have an LCD from Optrex
> > http://www.optrex.com/ProductList.asp?PartNumber=DMC%2D40218%2A
> > DMC-40218
> > Can you ,Ben, or anyone else give me advice to connect this module to
the
> > BS2.
> > Thanks in advance
> > Johan
> >
Original Message
> > From: "Ben" <ben@l...>
> > To: <basicstamps@yahoogroups.com>
> > Sent: Monday, August 19, 2002 11:35 PM
> > Subject: Re: [noparse][[/noparse]basicstamps] 7-segment serial driver
> >
> >
> >> There is the Max IC, or, if you want to build up a module that doesn't
> >> require too many lines, have a look at my 5 digit design which uses a
4094
> >> with each display. The data sheet has a circuit diagram, and software
> >> samples for the stamp.
> >>
> >> url is http://www.lennard.net.nz/electronics/led.html
> >>
> >> This is for a 5 digit display. For a 4 digit display, just remove one
of
> >> the modules.
> >>
> >> cheers,
> >>
> >> Ben, Wellington, New Zealand.
> >>
> >> --
> >> http://www.lennard.net.nz/
> >> Ben Lennard, NCEE, Dip EE
> >>
> >> Web Hosting and Electronics R&D
> >>
> >> Hm: +64 4 972 7567
> >> Mb: +64 21 536 627
> >> 87 Spencer Street
> >> Crofton Downs
> >> Wellington
> >> New Zealand
> >>
> >> "To the optimist, the glass is half full. To the pessimist, the glass
is
> >> half empty. To the engineer, the glass is twice as big as it needs to
> > be."
> >>
> >> No animals were harmed in the transmission of this email, although the
> >> Dog next door is living on borrowed time, let me tell you! Those of
you
> >> with an overwhelming fear of the unknown will be gratified to learn
that
> >> there is no hidden message revealed by reading this warning backwards.
> >>
> >>
> >>
> >>
> >>> From: "ulibasic" <ulibasic@r...>
> >>> Reply-To: basicstamps@yahoogroups.com
> >>> Date: Mon, 19 Aug 2002 10:13:21 +0200
> >>> To: <basicstamps@yahoogroups.com>
> >>> Subject: [noparse][[/noparse]basicstamps] 7-segment serial driver
> >>>
> >>> Hi Folks,
> >>>
> >>> I want to build a display of at least 4 digits for which I want to use
> >>> 7-segment LEDs. To save pins on my Stamp I would like to use some kind
> > of
> >>> serial-to-7-segment-converter, if possible one that can handle four
> > digits.
> >>>
> >>> Any ideas? Thanks in advance, Uli
> >>>
> >>>
> >>> [noparse][[/noparse]Non-text portions of this message have been removed]
> >>>
> >>>
> >>> 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/
> >>>
> >>>
> >>
> >>
> >> 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/
> >>
> >>
> >>
> >
> >
> > 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/
> >
> >
>
>
> 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 attached code works for the setup in the attached jpeg of the BOE wired
for 4 digits. The max7219.bs2 is modified to just drive the simple 4 digits.
The LEDSonar2.bs2 is for the complete BOE setup pictured in my jpeg. Both
work well. I had trouble with the actual code I downloaded from the Parallax
site so I adjusted it and it works now.
Tom
[noparse][[/noparse]Non-text portions of this message have been removed]