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gkaindl / ambi-tv

a flexible ambilight clone for embedded linux
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Any idea what's happening here? #85

Open heteroerectus opened 9 years ago

heteroerectus commented 9 years ago

The whole system quit working, so I redid all the wiring, but now I'm getting a weird blinking. With two 3A power supplies wired in parallel, I can get it to rainbow mode, but with the single 5A supply I can't. The HDMI behavior is the same.

Anyone see anything like this? https://www.youtube.com/watch?v=lo87vAq0iTk

Mrjohns42 commented 9 years ago

It's categorically a bad idea to have voltage sources in parallel.

heteroerectus commented 9 years ago

I've heard that, but the guys in my lab at Intel told me they do it all the time for quick tests. It was showing the exact same behavior with 3A as well after the Pi startup sequence, so I don't think anything is fried.

In any case, I've tried a bunch of different power supplies, no idea what's wrong though.

ghgoldberg commented 9 years ago

I second what MrJohns said. Use a single power supply AND COMMON GROUNDS! This has been mentioned numerous times in this forum. If you do not use common grounds, you are wasting your time (and ours for asking).

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From: heteroerectus [mailto:notifications@github.com] Sent: Tuesday, February 17, 2015 8:53 PM To: gkaindl/ambi-tv Subject: Re: [ambi-tv] Any idea what's happening here? (#85)

I've heard that, but the guys in my lab at Intel do it all the time for quick tests. It was showing the exact same behavior with 3A as well after the Pi startup sequence, so I don't think anything is fried.

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heteroerectus commented 9 years ago

It is hooked up to a single power supply but the behavior hasn't changed. I am using common grounds on everything.

Is there anything else I can try?

Mrjohns42 commented 9 years ago

How many volts is your power supply?

ghgoldberg commented 9 years ago

I used a Mean well RS-75-5 5V 12 amp power supply

You can read about my hardware implementation in Issue #48. Includes pictures, one of which is reproduced below: https://cloud.githubusercontent.com/assets/6525564/6736969/b841a478-ce3e-11e4-88f4-e5662d43ced5.jpg G-

From: Mrjohns42 [mailto:notifications@github.com] Sent: Wednesday, February 18, 2015 1:54 PM To: gkaindl/ambi-tv Cc: Geoffrey H. Goldberg Subject: Re: [ambi-tv] Any idea what's happening here? (#85)

How many volts is your power supply?

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