I went ahead and requested membership to the old yahoo group. Membership
pending. Are the yahoo group files stored anywhere else?
On Tuesday, 14 August 2012 23:24:58 UTC-5, Sean wrote:
>
> All,
>
> Thanks for the great advice! You guys have given me a LOT to chew on.
> I'll check back once I
A couple of years ago just for fun I started from
scratch and designed a nixie clock circuit from the
ground up (pun intended), that uses (6) 74HC160 counters.
The ic count is 17 packages for a plain 24-hour only clock.
The package count goes to 18 for a 12/24 hour selectable version.
It sets usi
> A couple of years ago just for fun I started from
> scratch and designed a nixie clock circuit from the
> ground up (pun intended), that uses (6) 74HC160 counters.
How do you do the divide-by-6 digits? Just use gates to reset the counters
when they get to 6? I'm more used to using 7492 counter
I use processors and this doesn't seem elementary to me!
I wouldn't say that a microcontroller is more difficult to use than
straight logic. On the contrary, I always refer to my penchant for using
microcontrollers as "cheating".. or the software engineer's way out:
"Only design enough electron
On 8/15/2012 11:18 AM, John Rehwinkel wrote:
A couple of years ago just for fun I started from
scratch and designed a nixie clock circuit from the
ground up (pun intended), that uses (6) 74HC160 counters.
How do you do the divide-by-6 digits? Just use gates to reset the counters
when they get
So, right now I'm looking at taking John's advice and starting with a
solderless board and some LED's. I see most of these basic parts at
RadioShack. Is this a good place to get parts? Any better places? Also,
where is a good place to get the 74141 drivers? And the 5V power supply?
Any co
I pick up all my parts from eBay. Takes two weeks for it to arrive but you
can't beat the price. Yes, I know there can be quality/fakes but so far the
record has been good. :)
Sent from my iPhone
On Aug 15, 2012, at 5:23 PM, Sean wrote:
> So, right now I'm looking at taking John's advice an
Sparkfun isn't bad. Also Limor Fried (ladyada)'s site:
http://www.adafruit.com
Limor is a member of this group and a great person to deal with.
Radio Shack... They're trying to make a comeback into this area of
retail, time will tell if they succeed. My experience has been that they
cost about
74141 drivers are out of production. eBay and surplus shops are the best
place to get them. Also the Russian K155ID1 (epoxy) or KM155ID1 (ceramic) is
an alternative and can withstand even higer voltages. The ceramic IC's have
a lower (better) thermal resistance.
RadioShack is more expensive as di
On the 12/24 selectable version of the '160 clock,
when it is in 12-hour mode, the thumbwheels must be
left preset for 0100.
Then, as David said, it loads that after 12:59:59
Chuck
>
>
> Original Message
>From: dfor...@dakotacom.net
>To: neonixie-l@googlegroups.com
>Subject: Re: [neonixi
... and my wife thinks that _MY_ clocks are tricky to set!
On 8/15/2012 3:54 PM, chuck richards wrote:
On the 12/24 selectable version of the '160 clock,
when it is in 12-hour mode, the thumbwheels must be
left preset for 0100.
Then, as David said, it loads that after 12:59:59
Chuck
Ori
That is why I vastly prefer the straight 24-hour only
version of this circuit. It has simpler logic, one less
gate package, and when you are done setting it, the
thumbwheels must be preset to .
The logic is simple: On the next clock pulse
after 23:59:59, it loads whatever is
left set on the
Also, I should add This is the reason that there is such a thing as
a "User Interface Engineer".
;)
On 8/15/2012 4:05 PM, chuck richards wrote:
That is why I vastly prefer the straight 24-hour only
version of this circuit. It has simpler logic, one less
gate package, and when you are done
> So, right now I'm looking at taking John's advice and starting with a
> solderless board and some LED's. I see most of these basic parts at
> RadioShack. Is this a good place to get parts?
It's certainly handy, but you can generally get things cheaper elsewhere. Of
course, I'm spoiled - wh
From my experience of modern devices I suspected that they are extinct.
John K.
[Some background in industrial engineering, ergonomics and
design-for-manufacture (which of course musn't nullify the user and repairer
aspects).] Yeah I know "repair, what's that?" Goes to show my age.
--
My first clock circuit was a 7 segment led, and I built it using a
microprocessor, a 6502, I had little experience at the time and it
wasnt easy.
I suggest that you build a published design first then either modify
it or build your own version, I'd also reccomend you build one that
runs from low v
That is a cool processor, it was my first one to program in assembly
language back in the early 1980's. It was used in the Acorn BBC
computers, they came onto the market with a Z80 co-processor
afterwards, which became my favorite for obvious reasons.
Michel
On Aug 16, 3:37 pm, dr pepper wrote
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