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davekp

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Reply with quote  #1 
I'm new to the DMX world.  Most of the devices are aimed at theatrical use...lights, fog, etc..  All very cool and useful here, but does anyone know of any DMX devices that will take a DMX signal and allow me to connect, for example, a D/C motor?  Or a pneumatic piston?

The effects that can be produced with lights are great, but I'd like to be able to "shake the floor" when the ship is hit.  The mechanical part isn't that hard (famous last words...), but not sure about connecting it up to the rest of the DMX stuff.

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bau.movement

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Reply with quote  #2 
My engineering crew has been working on some nontraditional DMX applications (which I owe the forums a post about), we've integrated relays that switch at 5v DC onto the DMX, then use that as a control for a separate electrical system.

The first one we did (as proof of concept) was a simple 110v light switch that kicks on a disco bulb when the shields are up.

Note: with a 12v power supply to the board, having the DMX returned a color code of about 90 (out off a possible 255) gives a voltage in the 5v range, so as to not cook the relay.

Otherwise, you are limited by the amount of current that your power supply can deliver and what the DMX controller/board can handle. The Holiday Coro boards that have been used by others on the forum cap out at 24v, if memory serves.

Keep us up to date, I've had shaking on my "too do list" as well.

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EMTP211

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Reply with quote  #3 
this is very possible you can use a DMX  device or a switch like wemo power switch  (i think its called) that activates a power supply and moves the floor sounds like an awesome idea.

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Reply with quote  #4 
I have had almost the exact same desire! Also it would be cool to trigger a "real" strobe light, solenoid to simulate a "blow-out" of a panel, burst of flowing air from a duct, etc. I will second whatEMTP211 and bau.movement but recommend something further to you. Especially with your background in IT, I very strongly recommend using an Arduino, a programmable "hobby microcontroller package". But be wary of the model.

There are a couple of specific models of Arduino that will allow it to easily be autodetected as a DMX target when connected over USB to the game server. Then, you have typical 5v & 3v I/O that you would put some relays or other signal-level controllable devices in front of. The Arduino is programmable in a C-family language, so you should be right at home.

I'm doing a simple version of this and it works really well; I followed this thread and pretty much replicated davr's work: https://artemis.forumchitchat.com/post/my-dmx-rgb-strip-for-ultra-cheap-6467023?trail=15&highlight=Arduino This is a great thread, lots of photos, diagrams, parts lists.

I think this solution hits the sweet spot between flexibility and complexity. So you if you replicate that first, then you need only slowly modify the program to deal additional DMX cues, using additional Arduino output pins. 


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Reply with quote  #5 
 
 
Artemis DMX -> DMX LED controller or Rasberry -> Relay (for more power than the Raspberry can give the Digital Out) -> Engine
to The so do the concatenation I would choose to control a motor via DMX.

If I have fun to programming, I would take Rasberry Motors for even greater control.
notsabbat

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Reply with quote  #6 
There are actual devices that can do that. here is the first I found

https://www.bulbamerica.com/products/matrix-dmx-4ch-double-output-dimmer-pack?CAWELAID=120150920000391663&CAGPSPN=pla&CAAGID=11323677006&CATCI=pla-132070278966&catargetid=120150920000918860&cadevice=c&gclid=CjwKEAjwrvq9BRD5gLyrufTqg0YSJACcuF81nusIrkmKPTR5fka3jQ42LeWDdXt_9TZI-9VFfpktBhoCkezw_wcB

Im sure you can find more if you look.

as people have already written there are also DIY options through Arduino or raspberry pi


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davekp

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Reply with quote  #7 
That's some good info there! Thanks!
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Dave Thaler

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Reply with quote  #8 
There is off-the-shelf equipment that requires no wiring expertise if you can afford them.
If all you want is on/off control of something you can plug in (I use a fan), then as EMTP211 mentioned a WeMo switch ($40 on Amazon Prime) will do the trick if you install Artemis Bridge Tools, with the additional benefit that you can control it from your phone or PC since it's WiFi connected.   If you want something more complex that can do full dimming of anything you can plug in, then you can get a 4-outlet DMX dimmer like the one notsabbat mentioned.  There's another one for a bit less ($100) here.
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