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  • GamePi - the Handheld Emulator Console

    Neither of your comments make sense. First, a Zero W is $5 if you can find it in a store, otherwise $10 (the same as a Zero) direct from Adafruit. For $0 you get wireless connectivity, allowing you to manage the games loaded on it without needing a USB plug, which I would have happily paid money for. I think a Zero W would be an excellent choice for this project.Your second point regarding a "portable" PS3 is outright ridiculous. The amount of weight alone makes it unportable, but finding enough batteries to power it for a few hours costing under several hundred dollars is not really possible. Perhaps I am not understanding your comment, but so far none of it seems constructive.

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  • GamePi - the Handheld Emulator Console

    ндогонят, why the recommendation against the Pi Zero W? I'm inexperienced with the Zero, but it seems to have slightly better specs plus wireless capability. I haven't had a need to use the Zero over the Zero W.Also, this is not comparable to a PS3. Not only does the PS3 have a lot of games that run on only it, but this does not have enough buttons to emulate the controller for those games nor does it have the processing power to run them should you have a ROM for them.

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  • Picroscope: a Low-Cost Interactive Microscope

    To use those would require modification of the stand. A purchased microscope has a bed that can be raised and lowered for both focus and accommodating the varying lengths of different magnification lenses. Would be awesome to use these though! It'll be a project for when my BuildOne 3D printer arrives in (hopefully) February... if I get to it, and it turns out well, I'll send the author of this Instructable a note to see if he wants the updated files.

    For those who don't speak Russian (I had to cheat with Google Translate), urijiii is pointing out that a web cam has autofocus. My feedback to that is that you cannot attach a zoom lens to it like you can to this camera. I would be very interested in both autofocus and a better zoom lens, even if they were somewhat more expensive.Линза увеличения не может быть установлена на веб-камеру.

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  • Tales From the Chip: LM386 Audio Amplifier

    Great write-up, but can you please fix your commentary regarding dB? It's a bit misinformational. An increase of 3dB (which means "double" for power measurements) and a measurement of 3dBPa (decibels from a Pascal, which is how audio measurements are actually taken) are two very different things.

    Just to be clear - the problem I'm trying to get at is you seem to be treating the dB scale as if it were linear. It isn't, that's the whole point. For example, a quick Google search for "spl scale" shows that a normal conversation is about 60dB while a 747 jumbo jet taking off is 120dB. But saying that the jet is twice as loud as a conversation is nonsensical, and while you don't actually say that you do guide the reader down that path of thinking with your "doubling power still only gets you 3dB!" comment. Any attempt to relate two different sound loudnesses using dB (without using an SPL meter and a chart) makes no sense unless you understand the meaning (and math!) behind the decibel, and why it is useful - which is strictly because we can say "70dB"...

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    Just to be clear - the problem I'm trying to get at is you seem to be treating the dB scale as if it were linear. It isn't, that's the whole point. For example, a quick Google search for "spl scale" shows that a normal conversation is about 60dB while a 747 jumbo jet taking off is 120dB. But saying that the jet is twice as loud as a conversation is nonsensical, and while you don't actually say that you do guide the reader down that path of thinking with your "doubling power still only gets you 3dB!" comment. Any attempt to relate two different sound loudnesses using dB (without using an SPL meter and a chart) makes no sense unless you understand the meaning (and math!) behind the decibel, and why it is useful - which is strictly because we can say "70dB" and "120dB" instead of "0.02 Pa" and "20 Pa" which is harder for a human to wrap their head around. Generally, logarithmic scales like dB are more useful when you're graphing things out in my experience, but I'll admit that I'm not very well versed in day-to-day dB use when it comes to sound engineering. If I'm incorrect, if there's some way that dB is far more useful in day-to-day sound engineering than I've seen, please let me know as I am very interested.Also, I apologize for my earlier incorrectness - I mistakenly thought that the SPL dB was dB from a Pascal, but in actuality it is dB from 0.00002 Pascal which was chosen as the lowest threshold of human hearing. So 120dB actually means "1,000,000 times more pressure change than the smallest pressure change (sound) a human can hear." Which is pretty awesome when you think about it - the human ear is amazing.

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