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I have been trying to get 8 RGB leds to work with a TLC5947 driver using a Raspberry Pi. But I am not able to get the leds to work.

I have tried with the help of fpulse from Wrobbel. But this did not work, maybe there are some settings wrong on the RPi.

I also converted the Library code the people at Adafruit used with an arduino. The pins from the driver are connected with the RPi in the following way:

  • LAT->CE0
  • /OE->GND
  • CLK->CLK
  • DIN->MOSI
  • GND->GND
  • V+->3V3

I am doing something wrong? Is there some setting that most be set on the RPi? Any tips would be welcome because for the moment I don't know how to get any further.

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  • Do both the Adafruit module and the encapsulated TLC5947 work from 3V3 logic?
    – joan
    Commented Feb 18, 2015 at 13:54
  • @joan the datasheet of the TLC5947 indeed says that it should be compatible with voltages between 3 and 5.5. adafruit.com/datasheets/tlc5947.pdf
    – Xer0FyT
    Commented Feb 18, 2015 at 14:31
  • Adafruit repeatedly mention 5V+ for the module. That might just be because it's targeted at Arduino. You could try my piscope (needs pigpio) to monitor the signals.
    – joan
    Commented Feb 18, 2015 at 16:57
  • @joan I have changed the connection of the V+ pin to 5V. But it didn't change anything immediatly. Now I will look into the piscope application, than I can at least monitor the signal. Thanks for the tip.
    – Xer0FyT
    Commented Feb 18, 2015 at 18:05

1 Answer 1

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It is not really a solution with the TLC5947. But I was able to get my leds to work with a MCP23017 module.

@joan thanks for looking into this.

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