[sdiy] Art of electronics computer

[mark verbos]

MC14495?


On Jan 9, 2012, at 3:13 PM, Veronica Merryfield wrote:

> There were some direct hex drivers at some point. I remember deconstructing the logic patterns for the 4 in to 7 out because it struck me that some of those patterns could be useful and would avoid needing more expensive logic devices in some of the stuff I doing back then. 
> 
> On 2012-01-09, at 12:03 PM, Harry Bissell wrote:
> 
>> I think that any direct drive 7 segment display can be considered "hexadecimal". It can display the
>> necessary segments to make all the characters in the hexidecimal set.
>> 
>> I don't know of a direct 'hex' driver chip that takes 4 bit binary and outputs this character set. There ~was~ one (once)
>> for hex on an LCD display.
>> 
>> The CD4511 is a good example of a driver that will NOT display hex characters. The "a" - "f" are blank...
>> 
>> H^) harry
>> 
>> 
>> ----- Original Message -----
>> From: Dan Snazelle <subjectivity at hotmail.com>
>> To: Steve Galle <stevegalle at gmail.com>
>> Cc: synthdiy diy <synth-diy at dropmix.xs4all.nl>
>> Sent: Mon, 09 Jan 2012 14:48:37 -0500 (EST)
>> Subject: Re: [sdiy] Art of electronics computer
>> 
>> I dont believe that is hexadecimal
>> 
>> Sent from my iPhone
>> 
>> On Jan 9, 2012, at 2:31 PM, Steve Galle <stevegalle at gmail.com> wrote:
>> 
>>> Something like this? 
>>> http://parts.digikey.com/1/parts/1631661-led-7-seg-7-6mm-ca-he-red-hdsp-7501-cd000.html
>>> 
>>> On Jan 8, 2012, at 1:32 PM, David G Dixon wrote:
>>> 
>>>>> They specify the HP 5082-7340 but i think others would work.
>>>>> Anyone know where to find those cheaply?
>>>> 
>>>> AFAIK, it is impossible to find hex displays today.  I tried to find some
>>>> for a step sequencer thingy I was working on a while ago, and everything I
>>>> found was long obsolete and unobtainium.  I wanted a 7-segment display
>>>> driver that would give 0 1 2 3 4 5 6 7 8 9 A b C d E F out, but this is not
>>>> to be had anymore, apparently.
>>>> 
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>>> 
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>> -- 
>> Harry Bissell & Nora Abdullah 4eva
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> 
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