Change blue static light?

[mnorthfield]

Hi,

I'm running AmbiTV with WS2801 LEDs (fork available) and couldn't be happier how well it works. I've just one question. When there is no signal a static blue light is present on every single LED. Is it possible to change this color? Or turn it off so there is no light? I don't want to turn off the Pi or AmbiTV.

-- Max

[sn00zerman]

That blue light is caused by the USB video dongle. When it receives no signal, it turns the screen blue. I also don't want to turn of my Pi, so I did put a switch between the powersource and the +5V of the LEDstrip, that way the Pi stays on, everything keeps running, but the LEDs are off :-) I made this even remote controlled :-)

best regards, Kris

-=(http://www.digitalplayground.be)=- Where fun meets technology

Op 9-okt.-2013, om 17:06 heeft Max Nordanåker notifications@github.com het volgende geschreven:

Hi,

I'm running AmbiTV with WS2801 LEDs (fork available) and couldn't be happier how well it works. I've just one question. When there is no signal a static blue light is present on every single LED. Is it possible to change this color? Or turn it of so there is no light? I don't want to turn of the Pi or AmbiTV.

-- Max

— Reply to this email directly or view it on GitHub.

[mnorthfield]

Thanks for a quick reply.

So this means that there is not really a fix for this? I mean make AmbiTV look after and react to if there is that surten amount of "blue-input" and just switch it to non output on the LEDs? Just me thinking out loud.

I've also made the outlet remote controlled. But I think it's a hassle because I can only turn it off if there is static blue light. I think my frame is wired weird or something. I've switched from PixelPi(ambipi), Boblight and now to AmbiTV. And they need different frame layout.

-- Max

[Dikootje]

Shouldnt it be possible to write another processor which only outputs black? Use the switch or spacebar to switch program when you want to turn your ambitv 'off'

[mnorthfield]

But that requires a press or a couple on a button. :)

-- Max

[sn00zerman]

Solve it the easy way:

• take a PIC (or an AVR), and put an IR receiver on it, a transistor, and a relais.
• write some code to react to the same buttons you use to turn your TV on/off. e.g. when pressing the "TV on" button on your TV remote, not only does your TV turn on, but also the relais will become active, and can activate the power for the LED-strip. (and the off-button to do the opposite)

Should only take an hour or so to build and program ... (I would have don't it that way, if I had a need for that, but in my house, it's part of my home automation with macro's (turning on FullHD 3D beamer, AV receiver, mood lighting etc)

good luck, Kris

-=[http://www.digitalplayground.be]=- where fun meets technology

On 10 okt 2013 11:36 "Max Nordanåker" notifications@github.com wrote:

But that requires a press or a couple on a button. :)

-- Max

— Reply to this email directly or view it on GitHub https://github.com/gkaindl/ambi-tv/issues/31#issuecomment-26040214.

[iLLiac4]

Is this problem caused by a specific USB chipset or. is generic problem? STK1160 is causing this or. UTV007?

[mnorthfield]

No, it is not. It turns blue because there is no input on the USB-grabber. Happens to all of us.

-- Max

[c6opuc]

I completely agree with mnorthfield. I think it would make a lot of sense to be able to detect this blue light and switch LED strip off when there is no HDMI signal. Unfortunately my programmings skills are not that good to do it myself, but perhaps somebody else can volunteer? This will be very useful addition to this project!