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Hi,
I found a way to enable / disable HDMI (shutter) through syscall on Linux Raspberry Pi and I would like to share it.
(I am using a LCD as a curing source)
Insert this is your "Shutter Open Gcode" and Shutter Close Gcode, and give it go.
[[Exec vcgencmd display_power 1]]
[[Exec vcgencmd display_power 0]]
Cheers
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just curious...
In an LCD system how is this different from just turning off the light source?...does it actually power down the LCD is there a lag time to power it on before it can block the UV? They consume very little power is this worth it?
I gather this cuts the HDMI signal to the LCD....does that help on the Pi? like power down the video drivers?
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Hi,
I now understand that most people use LCD's as masks.
For me however, I use the stock backlight (Daylight resin).
The shutter trick does not make sense when using the LCD as a mask.
But could be useful for projectors?
Anyway the operation takes 1 s to turn on, and instant shutdown.
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Cutting signal to projector does force it into power saving mode but after couple of minutes.
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Could be useful depending on the behavior of your projector I guess.
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