Nixie pendulum pov project.
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dr pepper
Apr 25, 2012, 7:07:07 PM4/25/12
to neonixie-l
Firstly this project has a led 7 segment display, however I intended
to use a nixie on the end product.
I saw a youtube vid for 'the first nixie propeller clock', maybe one
of you guys built it, its an excellent project however I wanted
something quieter that could run continuous.
So I came up with this prototype, its a pendulum swung by the head
assy and servo off a 3.5" hard drive (best I could think of at the
time) and a pic16f88, the pic 'knows' when the fire the servo coil as
it monitors the volatge from the coil (generator effect) and fires it
when it sees >20mV.
On the first try I used a led 7 seg display to see how it'd work, I
was hoping for something good or at least readable, but unfortunately
its naff, you cant read the display without squinting, it swings just
too slow, unless one of you guys has any ideas I think this one can
be
shelved.
Pic:
http://i807.photobucket.com/albums/yy352/widgidibbie/AFS.jpg
to use a nixie on the end product.
I saw a youtube vid for 'the first nixie propeller clock', maybe one
of you guys built it, its an excellent project however I wanted
something quieter that could run continuous.
So I came up with this prototype, its a pendulum swung by the head
assy and servo off a 3.5" hard drive (best I could think of at the
time) and a pic16f88, the pic 'knows' when the fire the servo coil as
it monitors the volatge from the coil (generator effect) and fires it
when it sees >20mV.
On the first try I used a led 7 seg display to see how it'd work, I
was hoping for something good or at least readable, but unfortunately
its naff, you cant read the display without squinting, it swings just
too slow, unless one of you guys has any ideas I think this one can
be
shelved.
Pic:
http://i807.photobucket.com/albums/yy352/widgidibbie/AFS.jpg
threeneurons
Apr 27, 2012, 9:22:32 PM4/27/12
to neoni...@googlegroups.com
I made a propeller Xmas display, a few years back. A major limiting factor is your eyeballs. My display rotates somewhere between 250 to 400 rpm. This limitation is due mostly to wind resistance. The motor free runs ~1800rpm. At that rate, it still forms an acceptable display. It falls apart if it gets too much slower. There really isn't anyway around it unless you re-engineer human eyeballs. You're just gonna half to swing it back-n-forth faster.
That's maybe why, those you've have done it, just stick to complete revolutions. It just makes it easier.
On Wednesday, April 25, 2012 4:07:07 PM UTC-7, dr pepper wrote:
On Wednesday, April 25, 2012 4:07:07 PM UTC-7, dr pepper wrote:
...unfortunately its naff, you cant read the display without squinting, it swings just
dr pepper
Apr 28, 2012, 6:01:29 PM4/28/12
to neonixie-l
Yes of course your correct.
Except for the complete revolution bit, you can buy commercial clocks
that have an inverted pendulum, that said the pendulum doesnt swing
under gravity its driven at a high enough frequency to eliminate
flicker.
I have modded the code for my clock so that now it works just like a
single tube nixie clock, it shows one number for 2 swings and then the
next, leaving a gap on the last number to show the start of the time.
It doesnt do what I first wanted, but it does make an interesting
display.
Dont think it'll catch on though.
> >http://i807.photobucket.com/albums/yy352/widgidibbie/AFS.jpg- Hide quoted text -
>
> - Show quoted text -
Except for the complete revolution bit, you can buy commercial clocks
that have an inverted pendulum, that said the pendulum doesnt swing
under gravity its driven at a high enough frequency to eliminate
flicker.
I have modded the code for my clock so that now it works just like a
single tube nixie clock, it shows one number for 2 swings and then the
next, leaving a gap on the last number to show the start of the time.
It doesnt do what I first wanted, but it does make an interesting
display.
Dont think it'll catch on though.
>
> - Show quoted text -
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