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RGB-PRO is a microcontroller programmed to it's full capacity with lean machine code to create a stand-alone RGB colour changer for LED lighting that outperforms many expensive architectural systems.
It is preprogrammed with a wide range of effects with various speed or colour options as appropriate. These range from psychedelic colour strobing through to very smooth and dignified colour changing with a massive pallete of over 16 million colours and a randomiser that produces a continuous stream of over 8 million data bits for maximum variety.
The chip utilises a control technique called Pulse Width Modulation (PWM) that switches the outputs on and off at very high speed (about 350Hz). The perceived intensity of LEDs driven by the outputs is varied by changing the on to off ratio. This is the logical way to control led intensity with a microcontroller and is very efficient in that the output drivers are either on or off and therefore dissipate very little heat.
The software routines for controlling the intensity of the LEDs with PWM were originally written in early October 1996 when the first commercial blue LEDs (silicon carbide) became available. This was long before CK and their highly dubious blanket patents even existed.


Pin 1. +5V supply.
Pin 2. Program select input.
Pin 3. Option select input.
Pin 4. Normally tied to +5v.
Pin 5. Blue channel output.
Pin 6. Green channel output.
Pin 7. Red channel output.
Pin 8. ov (-ve)

The inputs are pulled up to +5v internally by weak pull-up resistors. A normally open momentary button can be connected to pull these pins to 0v when pressed.

The outputs are active high and can drive a load of up to 20mA. They can either be used for driving a few LEDs directly or for switching larger power components like MOSFETs.

When any program selections are made, the chip automatically stores these to non-volatile memory. This means that the controller will always power up in your chosen setting.


RGB-PRO has two distinct program modes. Architectural and FX. In FX mode all programs are available for selection with the program button, but in Architectural mode the flashy effects are locked out and only the dignified effects can be selected.
To change mode between architectural and FX simply press and hold both the Program and Option buttons simultaneously for 15 seconds whereupon the lights connected should go from blue to either red or green. Red indicates architectural mode with the FX programs locked out, while green indicates that the FX have been unlocked. This setting is automatically stored in the chips non-volatile memory. You can change between modes at any time by following the same procedure.

There are four colour palletes used:-

Primary. A fixed selection of saturated primary colours.
Vibrant. A stunning range of saturated colours.
Bright. A range of bright saturated and pastel shades.
Full Spectrum. Every colour that can be achieved from black to white.

There are three versions of this chip. When powered up the controllers glow a single colour dimly for about a second to indicate which software they are running. Red release was originally launched in 2005 while green release was launched in May of 2009. Both versions have the same architectural programs, but differ in the style of the FX programs. The blue version is streamlined for consumer products and has a fixed set of 12 programs.

Please select your version below for a list of the programs and FX on the chip.


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