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waveshareteam / LCD-show

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How to power off 3.5inch LCD when unused? #3

Open liluom opened 5 years ago

liluom commented 5 years ago

Hi. Can i power off it (3.5inch RPi LCD (A)) for power saver by python? Thank you!

waveshare commented 5 years ago

About how to control the backlight by programming, we have updated to wiki, please it.

pistonov commented 5 years ago

And how?

SSQ66648 commented 4 years ago

i am currently experimenting with https://www.waveshare.com/wiki/3.5inch_RPi_LCD_(A) on a RPi 3B+. the driver seems to work and rotating screen (./LCD35-show 720) etc works. But how do we turn off the backlight after shutdown? I have looked through the wiki as you mentioned but there is no mention of the backlight on that page and I cannot find anything else that seems relevent? could you please provide instructions on howw to do this or even a link to the wiki instructions? many thanks

jytou commented 4 years ago

I have the same question here. How to programmatically switch off the screen? What about changing the brightness (what the small button on the back does). Thanks.

eschava commented 4 years ago

Will instructions from https://www.waveshare.com/wiki/3.5inch_RPi_LCD_(C) work for LCD (A) ?

Leshauts commented 1 year ago

This doc shows how to install and adjust brightness, but it doesn't make it possible to turn the backlight off. Also, even with this soft installed, when the display goes to idle, the backlight stays on...

sohail-bakhtiari commented 1 week ago

Will instructions from https://www.waveshare.com/wiki/3.5inch_ (9 cm)˜RPiLCD(C) work for LCD (A) ?

The pads indicated there does not exist for LCD (A). Neither does that small transistor.