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Pico Projector Dev Kit - replacing built in LED light source?

Ian Davison
Prodigy 10 points

Hi,

I have a Pico Projector development kit that I need to modify for a custom research setup.  I'm trying to replace the built-in 3 color LEDs with a single brighter source (controlled externally, not via the kit).  When I remove the LEDs and power up the board the red error light comes on (no surprise) and the projector stays on the startup splash screen. 

I can't find any info in the manuals re: how the system tests for LEDs on startup.  Is it possible to run the board without the LEDs attached?  Anything I can do to bypass the internal test to see if LEDs are present?  Or any way to add a 'dummy' element that mimics the LED array?

Thanks in advance for any input -

Ian

 

  • 0
    TI__Genius 9935 points

    Hello Ian,

    There is a signal (LED_ANODE) which comes back to the MSP430 from the LED interface. When this signal is above 1 volt it tells the MSP430 that the LEDs are not connected. You should pull this node below 1 volt to allow the MSP430 to continue initializing the Pico Kit v2.

    You can find the schematics for the Pico Kit v2 at http://digikey.com/pico under the "Related Pico 2 Documents". You will want "Pico Main-B Schematic".

    Best regards,

    Pascal

  • 0 in reply to Pascal DLP
    Prodigy 115 points

    Hello Ian,

    Did you manage to change the LED on the pico? I will also try to replace the light engine with brighter LEDs. Any comment is welcome.