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42.09 AUD


$42.09 AUD, inc GST
$38.26 AUD, exc GST
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Using an OctoBrite to control the color and brightness of multiple satellite modules.

The OctoBrite DEFILIPPI from Macetech is a carrier board for the Texas Instruments TLC5947 24-channel, 12-bit PWM LED driver. This is intended for use with external LEDs or LED modules, such as Macetech’s RGB 003 and 004 satellite modules (which were specifically designed for use with the OctoBrite). Using just three digital output pins and a simple protocol, your microcontroller can control a long chain of OctoBrites. For example, with 8 OctoBrites in a chain, you could control an array of 64 Satellite Modules and set each to any of 68,719,476,736 possible colors, or you could drive an array of 192 individual LEDs, setting each to any of 4096 brightness levels.

  • Supplies up to 20 mA per LED channel (not adjustable).
  • No reduction of brightness when multiple LEDs are connected (unlike typical microcontroller-based designs).
  • Input voltage range from 5.5 V to 30 V, with no separate logic supply required.
  • Overtemperature shutdown protects the LED driver from overheating.
  • Control pinout and protocol are compatible with the ShiftBar and ShiftBrite modules (but the data format is different).

The OctoBrite can also be used with the ultra-bright Satellite Module 001, though the OctoBrite is limited to 20 mA per LED channel, so it cannot drive this module at its maximum possible brightness. For a higher-current (150 mA) alternative, see the ShiftBar.

Example OctoBrite applications

The art display Estrella Intersects the Plane uses 10 OctoBrite DEFILIPPI modules, 80 RGB LEDs, and 40 servos, controlled by 7 Servo Controllers and a single Arduino:

The Syyn Labs DNA Sequencer used 32 OctoBrites and 512 RGB LEDs, controlled by 4 Arduinos:

Using the OctoBrite

The pinout of the OctoBrite DEFILIPPI module is shown below. As with the ShiftBar and ShiftBrite, signals are sent in to the CI, EI, LI, and DI pins, and these signals are sent out to the CO, EO, LO, and DO pins. Headers are provided for the power connections and the connections to the external LEDs, which should be configured in a common anode (low-side switch) arrangement. Pololu's custom six-conductor cables, available in lengths of 6" and 12" and 24", can be used to easily chain together multiple modules. You can make your own shorter cables with Pololu's 3" wires with pre-crimped terminals and Pololu's 0.1" 6×1 crimp connector housings.

For further details and example code, please see the instructions in the OctoBrite Documentation. Some similar example code is available on the ShiftBrite page. Pololu also recommend careful reading of the TLC5947 datasheet (1MB pdf).

Documentation and Resources:

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