[sdiy] Art of electronics computer

[Veronica Merryfield]

I have no idea - I thought it was 74 series. This was nearly 30 years ago when I was an impoverished teenager. 

On 2012-01-09, at 12:22 PM, mark verbos wrote:

> 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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> 
>