> ...This is the case with the DMMT5551S. Only downside is that they are
> 180V models, so they are probably barely sufficient for your clock. I
> know there's been a lot going around that 50V would be enough etc etc,
> but if you really want the maximum performance of your clock/watch
> inc
Is it possible that those russian 74141's were both from the same bad
batch? I've made a lot of clocks and only ever had one fail on me (it
failed the same way as you describe). For about $2/chip and a failure rate
(for me) of about 1 in 100.
-Adam
On Sat, Mar 10, 2012 at 3:21 PM, Cobra007 wrot
>
> On the production Nixie Ramos clocks I intend to use
> these:http://www.nxp.com/documents/data_sheet/PMBTA42DS.pdfThey are dual
> NPN 300v transistors that are really cheap. The downside is that there
> are only 2 transistors per chip, so that's 5 per digit, so they are
> going to significantl
I've had 2 74141 chips fail on my Ramos prototype within the span of a
couple of years. In each failure a digit would always stay on. I'm not
sure if this was my fault, but I tried to take every precaution with
my circuit design. I drove 4 in12's at 170v dc with 4 russian 74141
chips.
At this poin
Hehe, Cobra,
if I did that I would a) not have roommates anymore, and b, turn off
every single one and probably still go to bed, and c, have a room
filled with alarm clocks :-)
And Mike, the whole alarm system can be disabled. This project has
been really interesting for me so far, and from what
Hi Gang,
What characters do the Nimos 6100-92-0005 and 6100-92-0006 display?
can you help me?
Thanks
Dieter
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