5 Mar
2007
5 Mar
'07
5:49 p.m.
Does anyone know if multiplexing Nixies will
significantly reduce their
lifespan? Or does it in fact help versus "permanently on as needed"?
Looking at the datasheet for the non multiplexed GN4 nixie the different
cathode currents are given as ..
Cathode current 2mA
Maximum continuous current 3mA
Maximum pulse current 4mA
.. So from that I'd guess multiplexed nixies are a special breed.
Lee.
6 Mar
6 Mar
8:25 p.m.
dwight elvey wrote:
It is not a good idea to multiplex Nixies. They
don't always strike
exactly when the voltage is applied. This means you can't go too
fast.
Mux'ed NIXIE calculators tend to have cycle times around the 400 to 1600 Hz
range, or, given 12-16 digits, an ON time in the order of 40 to 200 uS with a
duty cycle of 6 to 8%.
One calc I have has a cycle over 3KHz and ON time down around 16 uS.
Some characterisation of some nixie types, note the DRIVE column:
http://www.cs.ubc.ca/~hilpert/eec/calcs/displays.html
8:49 p.m.
From: Brent Hilpert <hilpert at cs.ubc.ca>
dwight elvey wrote:
Hi
Looking at the other note on multiplexing Nixies, I was right and wrong.
Nixies with higher pressure were designed to be strobed or multiplexed.
Some were no designed for this. Those that were designed for it
could be up to 20 or 5% duty cycle.
The higher rates did have issues if done in the dark or behind too much
light blocking bezzles.
It is good to learn more.
Dwight
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It is not a good idea to multiplex Nixies. They
don't always strike
exactly when the voltage is applied. This means you can't go too
fast.
Mux'ed NIXIE calculators tend to have cycle times around the 400 to 1600 Hz
range, or, given 12-16 digits, an ON time in the order of 40 to 200 uS with
a
duty cycle of 6 to 8%.
One calc I have has a cycle over 3KHz and ON time down around 16 uS.
Some characterisation of some nixie types, note the DRIVE column:
http://www.cs.ubc.ca/~hilpert/eec/calcs/displays.html
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dkelvey＠hotmail.com -
hilpert＠cs.ubc.ca -
lee＠geekdot.com