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How should you turn of the LED?

Discussion in 'Hyperion General' started by Dewi, 28 May 2019.

  1. Dewi

    Dewi New Member

    Messages:
    11
    Hardware:
    RPi3
    I build an ambilight using the APA102.
    Can I just turn the LED lights off (brightness 0) or should I remove it completely from the electricity (smart plug)
     
  2. Arakon

    Arakon Member

    Messages:
    151
    Hardware:
    RPi1/Zero, RPi3, +Arduino
    Either works, but it'll still keep using power if not turned off fully.
    I use a master-slave plug that turns off the power to my whole AV system, TV, media player and ambilight when the receiver is turned off.
     
  3. Dewi

    Dewi New Member

    Messages:
    11
    Hardware:
    RPi3
    Okay, Thanks
     
  4. TPmodding

    TPmodding Administrator Staff Member Administrator

    Messages:
    1,372
    Hardware:
    RPi1/Zero, RPi2, RPi3, +Arduino, +nodeMCU/ESP8266
    if you do it this way, make sure your sd-card is read-only...otherwise you could damage your system
     
  5. Dewi

    Dewi New Member

    Messages:
    11
    Hardware:
    RPi3
    How can I tell If my sd card is read only?
     
  6. Akriss

    Akriss Active Member

    Messages:
    506
    Hardware:
    RPi1/Zero, RPi2, RPi3, 32/64bit, +Arduino, +nodeMCU/ESP8266
  7. Arakon

    Arakon Member

    Messages:
    151
    Hardware:
    RPi1/Zero, RPi3, +Arduino
    I use this method:
    https://learn.adafruit.com/read-only-raspberry-pi/overview
    Their "You can never ever undo this" is a bit misleading, though. If you need to make any changes, it's as simple as SSHing into the Pi and running

    mount -o remount,rw /


    This gets you write access until the next reboot, to make any changes and calibrations as needed.
     
    • Like Like x 1
  8. Shawn

    Shawn New Member

    Messages:
    3
    Hardware:
    RPi1/Zero, RPi3
    I'm putting together a system and have a similar question. My RPI will be running a security camera so it will remain on all the time. If I get a master/slave plug and plug my LED's as a slave to turn them off with the tv while keeping my RPI in a constant plug, will there be any kind of issue with the data/spi/ground being connected to the RPI? I don't think there will be, but it is a possibility I want to cross off my list. I think this might be a better solution than using a remote to trigger a script turning the LED's down to 0.