Read the statement by Michael Teeuw here.
Strip Down Guide for BenQ 28" VA Monitor GC2870H
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Just in case anyone is interested in what the project looks being almost fully assembled.
Features:
- Stereo Amplifier, 2 Speakers
- Google Voice hat and two Microphones, Google Assistant (MMM-Assistant)
- A2DP Bluetooth Enabled
- Capacitive Touch Button playing local news as a Podcast (MMM-Podcast)
- Landscape Mode for performance
- Meanwell 5V Power Supply
- Meanwell 12V Power Supply
- 28" GC2870VH Monitor
- Nielsen Aluminum Frame (45mm height with 20mm surface to attach two sided tape)
- 3m two sided Tape which is specially made for glueing mirros
- Standard wooden Backplate from hardware store screwed to aluminum frame
- PIR Sensor
The Mirror will be delivered first week of September. And is larger than the aluminium frame to give a clean view.
To Come:
- Casing for PIR Sensor and Cap Touch
- Maybe lighting from the inside
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Looks very nice so far. Keep us updated with your project.
One question: Have you thought about venting? I don’t see any venting holes or anything that allows the heat to dissipate. -
looks very nice let us updated about progress :)
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@madscientist initially for the test runs I will install two temperature sensors one in the top and one in the bottom to monitor the temperature. I have considered venting holes in the wooden backplate (bottom and top) or above the monitor in the aluminum frame and the same on the bottom but I would like to avoid that as I don’t know how much light would enter the casing.
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@maros thank you, I really don’t know id it will all work out, I started this for fun as I was reading about the amazing magicmirror2 project and their community. Two days later I am taking apart a brand new monitor… and now I have been constantly working on it on my days off.
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@madscientist So, experiment done. This is the result of 24h continues running. You can see the temperature has not quiet stabilized but the trend is well below anything critical. My guess would be that with a glass cover instead of the wooden frame I used to insulate the power dissipation should be even better.
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@yep_dd Less than I thought. But also check the temperature of the Pi. In my case the Pi runs at 63°C at 27°C room temperature. With active cooling it’s at ~52°C.
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@madscientist good idea, I will do that as soon as I have the actual glass. I have a passive heatsink installed already and in landscape mode the pi usage is less than 25-30% at the moment
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@yep_dd Same here for passive heat sink and usage. I just placed an old 40mm/12V fan in front of the Pi which runs at 5V. It’s hard to hear in an absolute silent environment. I’ve noticed crashes during the hot period in summer, that’s why I use a fan now and it generall runs smoother. I think at some points the Pi got hot enough to throttle.
