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I'd like to build a small internet radio out of my pi, but I'd like to use it at night, when the flashing LEDs would be disturbing. Is there any way to disable them?

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6

No

Unfortunately not. The PWR LED, for example, is directly wired to the 5V rail and other LEDs are controlled by closed-binaries.

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I know this may sound silly, but a piece of electricians tape over the top would work. Alternatively, put it in a case or box.

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  • The best and most simple solution!
    – ikku
    Jan 10 '13 at 0:32
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There is answer in How do I control the system LEDs using my software?

For Power led, if you have RPI 2, then you can turn it off by using 

echo 0 > /sys/class/leds/led1/brightness # Power LED

It is taken from the last answer from post I referred.

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  • 2
    Does not work RPI 3
    – akhmed
    Jun 2 '16 at 6:59
  • @akhmed You can only turn off the activity (yellow) light in the PR3 using echo 0 > /sys/class/leds/led0/brightness while logged in as root.
    – Mint
    Mar 11 '17 at 1:09

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