They're also covered in the TTL Cookbook (That's where I found out about
them)... Where did you find them?!?
-Adam
On Thu, Feb 23, 2012 at 6:44 PM, David Forbes wrote:
> On 2/23/12 7:11 PM, Dylan Distasio wrote:
>
>> Hi all-
>>
>> I recently picked up 2 SN74142 ICs. I'm about to show my ignora
On 2/23/12 7:11 PM, Dylan Distasio wrote:
Hi all-
I recently picked up 2 SN74142 ICs. I'm about to show my ignorance
again, but can someone with some patience walk me through how I would
use these in a nixie clock. I'm familiar with the 74141s but have to
admit after reading the SN74142 datash
Hi all-
I recently picked up 2 SN74142 ICs. I'm about to show my ignorance again,
but can someone with some patience walk me through how I would use these in
a nixie clock. I'm familiar with the 74141s but have to admit after
reading the SN74142 datasheet I am not entirely sure how this one work
Oh - if only perfect ones were still that price !!!
You might be needing a time machine for that ;-)
Jens
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The tube in question (B7971 with just the one dodgy segment) now on eBay at
£0.99p (about $1.50)
http://www.ebay.co.uk/itm/260963179117?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649
Oh - if only perfect ones were still that price !!!
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You received this message because you are subs
I had a quick look at the datasheet, and it seems there is
no tuning register, only an aging register. That resister
you can use if you really want to recalibrate it, using the
DS3231 32Khz output and your 32Khz reference derived from a
caesium clock or something.
I wonder how Maxim calibrates th
On Thu, 23 Feb 2012 13:14:52 -0800 (PST), you wrote:
>So, what is the best way to calibrate these chips? How do you figure
>out the values for tuning register and aging register? I normally set
>the tuning register by comparison with a second time source over 1
>week, usually that is good enough f
So, what is the best way to calibrate these chips? How do you figure
out the values for tuning register and aging register? I normally set
the tuning register by comparison with a second time source over 1
week, usually that is good enough for about 10 seconds per year. But
how do you figure out th
On Feb 23, 11:16 am, "MrNixie (UK)"
wrote:
> Yes, a neat little chip, which rather renders other time references
> such as GPS or radio time codes unnecessary for all practical
> purposes. But then, I don't think of a nixie clock as just a practical
> time piece!
>
> Laurence
Thank You very much
Michel, no 100Hz output I am afraid, since the on board (embedded)
crystal is 32.768KHz and of course 100Hz is not a sub multiple of
this. 8.192KHz, 4.096KHz, 1.024KHz or 1Hz (which is what I use to
interrupt the processor, and collect the latest time).
The resolution of the on-chip ageing regist
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