List Good Monitors To Build With

steve23p9835908

Hi,

I’m looking for a monitor right now to use in a PIR setup to save on power. My concern is that the monitor will display “no signal” when the HDMI signal is cut. Should I be worried about this and does anyone know how to get around it?

Thanks,
Steve

Timeeee

@steve23p9835908

@steve23p9835908 said in List Good Monitors To Build With:

Hi,

I’m looking for a monitor right now to use in a PIR setup to save on power. My concern is that the monitor will display “no signal” when the HDMI signal is cut. Should I be worried about this and does anyone know how to get around it?

Thanks,
Steve

Currently having the exact same problem. I’m currently looking into HDMI CEC stuff, but don’t know if I’m able to fix it with that. It may be the best option not to “cut” HDMI output, but to send the monitor into powersave-mode. I will investigate and let you know if there is some progress!

yawns

@Timeeee said in List Good Monitors To Build With:

HDMI CEC

using https://github.com/Pulse-Eight/libcec indeed works fine, I use the same thing on my pi. It is not yet connected to the PIR sensor, so I cannot provide a out-of-the-box solution for you.
One thing you should keep in mind is the “boot delay” the screen needs when you resume out of standby.

Timeeee

@yawns said in List Good Monitors To Build With:

@Timeeee said in List Good Monitors To Build With:

HDMI CEC

using https://github.com/Pulse-Eight/libcec indeed works fine, I use the same thing on my pi. It is not yet connected to the PIR sensor, so I cannot provide a out-of-the-box solution for you.
One thing you should keep in mind is the “boot delay” the screen needs when you resume out of standby.

Thank you dude!
Maybe I can get Pulse-Eight running somewhere today. Will hook it up to my PIR as soon as possible :D

The delay is fine for me, better then “no signal” ;)

steve23p9835908

Do all HDMI devices respond to these commands or only particular models? If the latter, can you recommend one? Cheers, Steve

yawns

@Timeeee said in List Good Monitors To Build With:

Maybe I can get Pulse-Eight running somewhere today.

I followed these few steps: http://constey.de/2014/10/fernseher-ueber-hdmi-per-raspberry-pi-steuern-cec/
I know the instructions are in German, but the commands should be enough.

@steve23p9835908 said in List Good Monitors To Build With:

Do all HDMI devices respond to these commands or only particular models?

I would say most “smart” screens do, but I don’t have a list of screens which support this. Sorry

Timeeee

@yawns I think I tried it now for about 5hrs, but Im not able to build the CEC stuff (looks like the how-to is for an older version). Unfortunatly I need some more time to fix those build bugs :(

tomster

I can’t tell if my approach would work on the MM-image, but on a RasPi with latest Jessie-image it seems pretty easy:
sudo apt-get install cec-utils

sudo usermod -a -G video [put user triggering the following commands here]

To turn monitor on:
echo on 0 | cec-client -s -d 1
To turn it off:
echo standby 0 | cec-client -s -d 1

Of course it depends on the time your specific monitor will need to come out of deep stand-by. Mine takes 12 secs to respond :-(
But I’ve seen monitors only needing 2 secs…

cowboysdude

I also us ASUS monitors… have had great luck with them!! They seem to stand up to the use!

jdfraser

I’ve had success gutting an old IBM Laptop for its LCD. I ordered this driver board kit off of EBAY and it works great. The ribbon cable is a bit short, but I’ll worry about that when I finally get around to installing the LCD into a mirror / picture frame. My local recycling depot always seems to have a bunch of old laptops being disposed of. I recommend emailing the driver board seller to make sure you get the right one to work with your LCD.