Forums > MaxMSP

Light tubes

March 25, 2006 | 6:34 pm

Hi – might not be the right place to ask, but I need to control app. 100
fluoroscent light tubes individually. I believe one way could be with a
0-5V dimmer for each and teleo boards, but I wondered if anybody here
has had experience with this?

Thanks,

Lars


March 25, 2006 | 9:03 pm

yes, i do.

get two of these:
http://www.falco.be/store/popup_image.php?pID=1080
they are not expensive, say � 150,- each.

they each will give you 72 analog outputs, you can switch them to go
between zero and 5, 10 or 15volt.
output is 8 bit resolution/256 steps.

you can control via midi (slow) or via dmx (fast).

I’ve used a lan-box to go from ethernet to dmx.
My maximum analog-out-experience was to use six of these demultiplexers
to control a led-installation.
432 analog channels out, running at 20 fps, worked like a charm and
very reliable.

good luck,

Joost.

——————————————-

Joost Rekveld
———– http://www.lumen.nu/rekveld

——————————————-

"The mystery of the world is the visible, not the invisible"
(Oscar Wilde)

——————————————-


March 25, 2006 | 9:13 pm

oh, forgot,

yes, you do need dimmers for each (and special dimmeable fluorescent
tubes).
the dimmers are not cheap (if you need a hundred, that is..)

good luck,

Joost.

——————————————-

Joost Rekveld
———– http://www.lumen.nu/rekveld

——————————————-

"The mystery of the world is the visible, not the invisible"
(Oscar Wilde)

——————————————-


March 25, 2006 | 10:54 pm

Great, Joost!

True, the dimmers is my worry right now as it’s my impression they’re
expensive.

Also, I haven’t found any taking a 0-5V control signal (or 0-10, 0-15V).
Maybe better to DIY, since I’ll be needing so many?

Which dimmers did you use?

Unfortunately, the tubes have fixed colour. I remember seeing this tower
in Hong Kong that had the facade covered with circular tubes of changing
colours. I’m pretty sure it wasn’t done w. combinations of different
tubes – do you have an idea of what these tubes are made with?

*L


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