141–150 of 293 posts
If the Nintendo 64 was entirely passively cooled, surely the Pi can be? Mind Nintendo/SGI had much more surface area to work with so this is probably an unfair comparison.
The Pi 4 is much more powerful than an N64. So much so, it can emulate it in software.
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Yeah, I'm kinda wondering just what the Pi is supposed to be at this point. Is it still an inexpensive low power device for teaching basic computer science? Because it seems like it's more for making Kodi boxes or the worlds most powerful LED blinkers.
Why does it need to be either/or? The way I look at it, every single hobbyist, retropie, dust collector, etc is just enabling the scale that allows them to deliver the hardware at the price point. If 100% of Pi went into schools, the foundation would likely have dried up 4 years ago. We might not be the target market, but we enable it. We enable the development, the third-party/after-market, we provide the community.…
https://flirc.tv/more/raspberry-pi-4-case
I didn’t find a raspberry pi case made by Flir, the thermal imager company.
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Yep, a lot of people nowadays is using IR cameras without any calibration or understanding of the physics behind the measurement. The truth is, the camera requires an emissivity coefficient to associate the received radiation with the emitter body temperature. There are tables for different types of materials, but the best is to calibrate against a surface thermocouple or similar. A corollary of this is, when you see…
>people nowadays is using IR cameras without any calibration or understanding of the physics behind the measurement The four factors are Emissivity (ε), Absorptivity (α), reflectivity (ρ) and transmissivity (t). Emissivity is only one facet. Ideal is high Emissivity and low reflectivity. https://en.wikipedia.org/wiki/Radiation_properties
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Seems like the winning solution would be to do as Apple does and make the case the heatsink. Aluminum is a pretty good thermal conductor, and at the very least it'd get you lots of surface area.
Wouldn't that make it hard to touch?
This is not the 1990s. It is perfectly acceptable and even advantageous to design for a high peak:normal load ratio, with thermal throttling. In this case, it allows for a compact, cheap, fanless design for the vast majority of users.
There is no evidence the heat dissipated will impact lifespan. It is common for the components picked out in particular (power supply, USB-C controllers) to be deliberately designed to run hot. They aren't made on the same process as the SoC.
I feel like there is a missing piece of the software/hardware design art here. There are many takes like this on the Raspberry Pi 4 design. Why only one ethernet? Why no fan? Why not more USB-C? Because it's $35 and because, perhaps, you aren't the target majority market. It's going to satisfy the vast majority of people, and those it doesn't have very simple and cheap ways to mod it so it does.
This article is actually describing how the Raspberry Pi 4 does NOT need a fan. This is not the 1990s. It is perfectly acceptable and even advantageous to design for a high peak:normal load ratio, with thermal throttling. In this case, it allows for a compact, cheap, fanless design for the vast majority of users. There is no evidence the heat dissipated will impact lifespan. It is common for the components picked out…
Not that fans need to be very loud, or even spin very fast for something of this size, I imagine relatively low RPMs (probably sub 100 RPM) could still achieve considerable cooling, especially with a crossdraft optimized case.
If the Nintendo 64 was entirely passively cooled, surely the Pi can be? Mind Nintendo/SGI had much more surface area to work with so this is probably an unfair comparison.
The Pi 4 is much more powerful than an N64. So much so, it can emulate it in software.
AFAIK, the peak power draw of these boards is substantially less than 10 watts, so regardless of how high the temperature of one small part of it becomes, we're still talking about a rather small amount of heat energy that needs to be pulled off the board. My gut says that a passive heatsink with a relatively large surface area to facilitate radiation and convection currents should be able to do the trick.