Symphony Interactive Robotic Lighting, LRX, Toronto

Robotic Lighting Project – 2008


LRX Lighting –

A film industry manufacturer of robotic lighting looks to replace their bulky, mechanical switch based control electrics with a standardized electronic control solution in a new fixture design.

The Challenge

Design and deliver a complete robotic control solution capable of interfacing with existing USITT DMX 512/1990 compliant lighting desks and show controllers.

Features (Fixture)

  • Optically isolated DMX 512 input. The optical isolation circuitry utilizes an onboard DC/DC converter to separately power an RS485 transceiver. This methodology preserves adherence to the EIA RS485 electrical specifications while at the same time eliminating the possibly of ground loops that often plague DMX lighting systems.
  • 5 H-bridge motor driver outputs each capable of delivering 12VDC at 6A peak current. Thermal overload protection, soft startup, braking and overshoot protection built in to each driver.
  • 3-digit .56″ LED display for fixture selection and parameter adjustment.
  • LED indication of valid DMX data reception.
  • Automatic lamp fan control via CPU-monitored current sensor.
  • User-resettable non-volatile bulb hour counter.
  • Factory-resettable non-volatile machine hour counter.
  • Field upgradeable firmware via the existing DMX interface.

Features (remote)

  • Industry standard DMX 512 output.
  • 2-digit .56″ LED fixture selection display.
  • PAN/TILT/FOCUS/TROLLEY adjustment.
  • Momentary control of gel cooling fan to reduce lighting flutter during critical film shots.
  • Field upgradeable firmware via the existing DMX interface.
  • In addition to the handheld remote, Symphony also designed and created an accompanying iOS app that mimicked the handheld controller. The App, available from the iTunes store is designed to mimic the handheld controller and can control up to 32 fixtures wirelessly using Artnet.


Symphony Interactive Mockup



In addition to the electronics hardware, we also provided the manufacturer with their own branded PC support software to adjust machine hours and maintain firmware revisions and feature requests in the field.