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octobrite [2009/09/04 15:15]
macegr
octobrite [2015/05/21 20:50] (current)
macegr
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-====== Introduction ======+====== OctoBrite CYANEA ======
  
 {{octobrite_med.jpg?nolink  }} {{octobrite_med.jpg?nolink  }}
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 {{octobrite_both_sm.png?nolink  }} {{octobrite_both_sm.png?nolink  }}
-^  Controller: | Texas Instruments TCL5947  |+^  Controller: | Texas Instruments TLC5947  |
 ^  LED Brightness: | 6000mcd per color  | ^  LED Brightness: | 6000mcd per color  |
 ^  LED Viewing Angle: | 120 Degrees  | ^  LED Viewing Angle: | 120 Degrees  |
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 {{octobrite_closeup.png?nolink  }} {{octobrite_closeup.png?nolink  }}
 The 5V pad is the logic power supply for the [[http://focus.ti.com/lit/ds/symlink/tlc5947.pdf|TLC5947 LED controller]]. Maximum voltage is 5.5. The VLED pads connect to the common anode terminals of the RGB LEDs. The GND pads should be connected to the ground of the LED power supply and the 5V logic power supply. The VLED power supply should be selected to keep the voltage drop across the TLC5947 within a volt or two above the LED drop voltage. The ideal supply voltage would typically be between 3.3V and 4.5V. The OctoBrite can in fact handle higher voltages, such as 5V, but the issue becomes one of heat dissipation. The OctoBrite controller will have to expend more energy as heat than is used to light the LEDs. All LEDs on full power (PWM 4095) at 5V will quickly cause the TLC5947 to become too hot to touch. Reducing the PWM settings or changing the number of LEDs active will reduce the heating. Another possibility is to mount the OctoBrite with the TLC5947 in contact with a heat sink. The 5V pad is the logic power supply for the [[http://focus.ti.com/lit/ds/symlink/tlc5947.pdf|TLC5947 LED controller]]. Maximum voltage is 5.5. The VLED pads connect to the common anode terminals of the RGB LEDs. The GND pads should be connected to the ground of the LED power supply and the 5V logic power supply. The VLED power supply should be selected to keep the voltage drop across the TLC5947 within a volt or two above the LED drop voltage. The ideal supply voltage would typically be between 3.3V and 4.5V. The OctoBrite can in fact handle higher voltages, such as 5V, but the issue becomes one of heat dissipation. The OctoBrite controller will have to expend more energy as heat than is used to light the LEDs. All LEDs on full power (PWM 4095) at 5V will quickly cause the TLC5947 to become too hot to touch. Reducing the PWM settings or changing the number of LEDs active will reduce the heating. Another possibility is to mount the OctoBrite with the TLC5947 in contact with a heat sink.
 +
 +**As is true of most digital electronics, if you connect power backwards or short contacts with metal objects or other modules on the chain, you WILL destroy the logic chip. Please triple-check all cables and make sure the modules are not in contact with anything conductive BEFORE applying power.**
  
 ====== SI (Serial In) ====== ====== SI (Serial In) ======
/home/macetec/public_html/docs/data/attic/octobrite.1252091707.txt.gz ยท Last modified: 2009/09/04 15:15 by macegr