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RC4 OneTouch™

Setup takes seconds.RC4 Magic DMX4dim

When the objective of a device is to be as small and inconspicuous as possible – to be invisible – the biggest challenge is creation of the user interface.  Way back in 1993, RC4 Wireless recognized that wireless dimmers would get smaller and smaller, and a method of setting channels and curves needed to be scalable down to the tiniest sizes.

Our OneTouch™ system first appeared on RC3 dimmers (the predecessor of RC4), when the limitations of wireless technology could deliver only 32 channels, and curves were limited to Linear and Non-Dim.

Today, RC4 OneTouch™ makes it easy to assign any of 512 DMX channels and any of 4 dimmer curves to any RC4 dimmer with a single press of a single button. No matter how small wireless dimmers become, we will always find a way to provide one pushbutton for each dimmer output.

Dimmer Curves

Using RC4 OneTouch™, four different dimmer curves can be selected on most devices: ISL (Inverse Square Law), ISL with RC4 Digital Persistence, Linear, and Non-Dim.  Using Remote Device Management (RDM) and/or RC4MagicPC, several additional dimmer curves are available: Inverted ISL, Inverted Linear, Inverted Non-Dim, Servo CW, and Servo CCW, and the 4th curve (normally Non-Dim) can be changed to any other available curve to put the features you need most right at your fingertips.

The linear curve is perfect for incandescent (including halogen) lighting – traditional filament bulbs.  With this curve, a DMX channel at 50% produces 50% output at the dimmer, which produces 50% lumen output in a lamp filament.

The ISL curve is optimized for light emitting diodes (LEDs).  LEDs produce 50% lumen output when dimmer power is reduced to 25% (which is also why LEDs, on average, draw a lot less power than other lighting – small reductions in brightness result in large reductions in power consumption).  You must use the ISL curve to make LEDs dim smoothly; do not use the linear curve for LEDs.

The Non-Dim curve includes hysteresis to ensure the dimmer output will never dither or oscillate, even if the assigned DMX channel is hovering around 50%.  The DMX level must rise above 55% to turn the dimmer fully on; then the level must fall below 45% to turn the dimmer fully off.  This is ideal for relays, solenoids, AC inverters, and anything else that needs cleanly switched DC power.  Unlike using a traditional SCR-based AC dimmer as a switched AC circuit, the DC output of an RC4 Non-Dim output is absolutely clean DC power, limited only by the power handling rating of the dimmer components.

The Servo CW curve runs most hobby servo motors in the clockwise direction.  The lowest DMX level produces a 1ms pulse and the highest level produces a 2ms pulse; pulses get longer as the channel level increases.

The Servo CCW curve runs hobby servo motors counter-clockwise.  The lowest DMX channel level produces a 2ms pulse and the highest channel level produces a 1ms pulse; pulses get shorter as the DMX channel level increases.