Chassis Misprint –> Discounted Pricing

 DMX, MIDI, RS232  Comments Off on Chassis Misprint –> Discounted Pricing
Sep 172015

September 17, 2015

This doesn’t happen very often, but we’ve got two damaged DecaBox chassis tops which are looking for a good home.



They were printed (briefly) out of registration, then re-printed correctly.  So if you enlarge either photo, you’ll see the bottom of a row of text  that’s in the wrong place.

Otherwise, there’s nothing wrong with the gear.  It’s 100% brand new, just cosmetically imperfect.  And if someone would like to use it at a discounted price, we’d be happy to oblige.

Usually when we list ‘scratch and dent’ gear like this, it only lasts a day or two.  Sometimes only a few hours.

Our offer today is that we’ll take $30 off any regular priced system we sell for each of these two parts.  So take a look in the online store and pick your favorite version.  Then send an email to sales AT with ‘Imperfect Chassis’ in the subject line.  Let us know your delivery address and deadline, and we’ll send back an online invoice for the total + shipping – $25 discount.

This page will be updated as quantities change.  Thanks!

 Posted by at 9:37 am

A Three-Output RS-232 DMX Engine With DMX Input Processing

 Case Study, DMX, RS232  Comments Off on A Three-Output RS-232 DMX Engine With DMX Input Processing
Jul 072014
3 Output RS-232 DMX Engine

3 Output RS-232 DMX Engine With DMX Input Monitoring

Here’s another in our series of ‘There’s Only One of These in the Whole World’ designs.

A client needed a modification to our very popular RS-232 DMX Engine.  They were using a PLC to drive a series of very remote DMX light fixtures.  This is a very common use case, and many of our customers who work in industrial control have done similar things.

However, this group needed three separate data outputs instead of one.  And further, their PLC needed to monitor several channels of a DMX stream which was generated by other equipment.  They asked if we could help.

Of course!

It took an afternoon to edit our regular circuit board design to include the new features.  Our across-town vendor can fabricate short runs of circuit boards in five business days*, so the files were emailed to them.  Once the boards came back, they were loaded with components, programmed and tested.  Per the customer’s request, we added a command to the firmware which allows the state of any or all of the incoming DMX channels to be queried at any time.

It took most of an afternoon to generate and fabricate the chassis design, including a few test cuts in thin card stock.

Test Cuts - Front Panel

Test Cuts on Cardboard – Front Panel

If you need something similar, or if you’ve searched the entire Internet and can’t find the precise thing you’re looking for, let us know.  There’s a good chance we can help.


* They can move quickly, too.  It’s stop-your-heart expensive, but we’ve done four hour turn times with these guys before.  Pretty neat.

 Posted by at 9:11 pm

Control4 DMX Control using RS-232 DMX Engine

 DMX, RS232  Comments Off on Control4 DMX Control using RS-232 DMX Engine
May 242014


The friendly folks at Domaudeo in Quebec have written a very powerful plugin which bridges between a Control4 automation system and our RS-232 DMX Engine.

This demo video gives a great overview of the available options.  Real-time color control, scene recall with silky smooth crossfades and more are demonstrated.  Also, the ability of our engine to simultaneously and in parallel set any DMX channel to any level at any speed is also featured, starting at about 1:35 in the video.

There’s a more detailed discussion of the driver in this thread on the Control4 forums.

For pricing & availability, contact:

Jerome Fortin
Domaudeo Inc.
Levis, Quebec Canada
418-800-4644 | |

Here’s the video clip:

 Posted by at 4:57 pm

RS-232 DMX Engine – New Firmware

 DMX, RS232  Comments Off on RS-232 DMX Engine – New Firmware
May 052014


We’re pleased to release firmware 4.85 for the RS-232 DMX engine.

Among other new features, this firmware introduces simultaneous, massively parallel command processing.  This means  that each DMX channel now has its own fading engine.  Any channel can be set to any level, at any fade speed, at any time.  The system no longer waits for a command to finish executing before processing a second command.

This allows a great deal of flexibility and creative control.  More detail, including PDF documentation, can be found here.  This firmware build can be purchased from our online store (scroll down) for only $15 as well.  It will run on all previously-shipped equipment.


 Posted by at 6:30 pm

Easy DMX Control of Lutron Graphic Eye 3500s

 Case Study, DMX, RS232  Comments Off on Easy DMX Control of Lutron Graphic Eye 3500s
Feb 282014

newgraphicA theatre in the Pacific Northwest contacted us a few weeks ago.  Their space was set up with a pair of control systems running in parallel:  a DMX console and dimmers handle the theatrical lighting while a pair of wall-mounted 6-channel Lutron Graphic Eye 3500 architectural dimmers drive the house lights and some backstage fixtures.

Users on or near the stage can easily recall presets and adjust the lighting levels of the 12 connected circuits.


In the lighting booth, an ornery Windows XP platform runs Grafik Eye Liason software.  Liason provides a GUI for remotely recalling stored presets and adjusting individual dimmer levels.  This machine is in turn connected to a Lutron GRX-PRG interface, which talks with the wall controllers mounted near the stage.

The somewhat awkward end result is that the lighting designer has to use two separate systems to drive all the lights in the space. To this end, they asked:

“Would it be possible to remove the computer and drive the Lutron system directly from our lighting console?  Running both systems all the time is a drag.”

We’re pleased to report that the answer is an emphatic yes.

What We Did

Research revealed that the GPX-PRG receives RS-232 data from the XP machine, massages it a bit, then sends it to the Graphic Eye dimmers via a balanced RS-485 system. More germane to our situation, this RS-232 protocol is well documented.

DecaBox - Laser Etched

We proposed replacing the large, slow and inconvenient Windows XP computer with a DecaBox.  The new system would receive DMX, impersonate Liason and drive the GRX-PRG (and by extension, the downstream Graphic Eye boxes) as if the stock installation had never been touched.

The theatre approved our design, so we shipped up a DecaBox containing this custom firmware.

It took two or perhaps three minutes to connect the new hardware and set the start channel.  The custom firmware we provided worked instantly and flawlessly.  12 consecutive channels of DMX are monitored.  Any time one of them changes, the appropriate control string is sent to the -PRG interface.

Et voilà!  The lighting designer has complete and convenient control of every fixture in the space.

And in the client’s own words:

“We run a small community performing arts center in an old historic fire station and needed a way to have our DMX light board communicate commands with our RS-232 based house lighting.
The DecaBox was the solution we needed. We called, outlined the situation, ordered  and received the unit in a few days and had it up and running perfectly in no time. I was surprised at how a seemingly insurmountable problem was dealt with at such a reasonable cost with so little effort. Thanks so much for the quality product and service Engineering Solutions!”All the Best,~Matt @ The Firehouse Performing Arts Center

Need something similar?  Let us know.

 Posted by at 4:54 pm