Which decimal-to-seven segment decoder chip ?

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Externet
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Which decimal-to-seven segment decoder chip ?

Post by Externet » Mon Oct 13, 2003 9:28 pm

Hi.
Tring to show 0 to 9 on a single digit display from ten lines...
It's NOT 4 lines binary coded decimal BCD; it's the output of a LM3914 in dot mode which I want to display as digits.
I could make a diode array coversion, but, isn't there a CMOS logic chip that does it?
Thanks,
Miguel
- Abolish the deciBel ! -

hlreed
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Re: Which decimal-to-seven segment decoder chip ?

Post by hlreed » Tue Oct 14, 2003 9:08 am

Miguel,
You will probably have to do it yourself.
7 segment displays are at the end of their life and they are all 4 line BCD.
Since you already have the digit, just light up an led for 0 though 9. If you must have a 7 segment display, you will have to make your own 10 to 7 converter.
Harold L. Reed
Microbes got brains

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Re: Which decimal-to-seven segment decoder chip ?

Post by rfpowerdude » Tue Nov 11, 2003 9:13 am

What about a decimal to BCD converter? Is there anything like that available? I know there are BCD to decimal, but what about decimal to BCD?<p>Otherwise, yses, you would have to make your own using a PLD or <gads!> discrete gates.<p>--
joe

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Re: Which decimal-to-seven segment decoder chip ?

Post by bmachado » Mon Nov 17, 2003 11:27 am

Would the 74147/148 family of devices (one of ten in to BCD out) be what you are looking for? Then you could drive/latch your seven segment display as you needed to.

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Re: Which decimal-to-seven segment decoder chip ?

Post by russlk » Mon Nov 17, 2003 7:40 pm

Good one! My TTL book does not list '147 but Mouser has 2 in stock, $3.90 each.

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Edd
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Re: Which decimal-to-seven segment decoder chip ?

Post by Edd » Tue Nov 18, 2003 12:51 am

Ay Miguel:<p>Y aqui tenemos……..
http://www.ee.washington.edu/stores/Dat ... 4ls148.pdf<p>
73's de Edd
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;)

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