But the powersupply, which is the simplest part of Mike's circuit, would
need a complete overhaul. TTL parts need a solid +5vdc and won't work
with Mike's unisolated zener shunt logic supply. Also, as you say, the
74142 won't work at the 250vdc provided by the unisolated DC doubler
I might just have to add some 0B2's to a nixie clock just for the
coolness factor now. :)
Antique Electronics Supply has them for $6 each. :)
-Adam
On 7/27/2011 5:44 AM, GastonP wrote:
Simplicity itself, and if one adds a nice tube shunt regulator, 2x0B2
in series, it has a +10 in coolness
| 250vdc supply on his board would be too hot for a 74141 so probably
| too hot for a 74142.. Maybe a transformer supply..
|
| -Adam W7ATJ
250V is a tad too hot for a 74141. Western 74141s had zener clamps at
~60V, an from experience the Russian parts started to breakdown ~100V.
So if a nixie
I'm just wondering how practical it would be to reproduce mike
Harrison's circuit with 74142's.
His primary design consideration was only modern parts, simplicity
cheap component costs...
While his design is logically simple, it's not simple to build..
He has 28 MPSA42 drivers. 1 of which is
I never really thought of these older ICs having seals, but it makes
sense, in the sandwich sense. I looked at one of the Fairchild 74141s, and
where the epoxy is sandwiched between the ceramic, sure enough, there's a
hole in there. I thought it was a bubble, but using a high tech tool called
a
On 11-07-23 10:53 AM, Shane Ellis wrote:
I never really thought of these older ICs having seals, but it makes
sense, in the sandwich sense. I looked at one of the Fairchild 74141s,
and where the epoxy is sandwiched between the ceramic, sure enough,
there's a hole in there.
(Oh no, another
