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  • How to Use Supstronics X400 Expansion Board

    The video does a decent job of explaining what the X400 is, however much of that explanation should also be in an introduction to this instructable. Things that even the video is missing include, "Why are you using a Yellow RCA jack for Left Audio, and a White one for Right?" "There is a volume control next to the RCA jacks, are the RCA jacks outputting line level outputs, or speaker level outputs? Does the volume control affect Line Level outputs, or only the screw down terminals on the far side of the board?" I'd personally look at getting one if it had audio capture capabilities, as I would think that a RPi based audio recorder would be a great tool to have so that I'm not trying to capture audio on a device that's expecting me to speak into the microphone of a ph...see more »The video does a decent job of explaining what the X400 is, however much of that explanation should also be in an introduction to this instructable. Things that even the video is missing include, "Why are you using a Yellow RCA jack for Left Audio, and a White one for Right?" "There is a volume control next to the RCA jacks, are the RCA jacks outputting line level outputs, or speaker level outputs? Does the volume control affect Line Level outputs, or only the screw down terminals on the far side of the board?" I'd personally look at getting one if it had audio capture capabilities, as I would think that a RPi based audio recorder would be a great tool to have so that I'm not trying to capture audio on a device that's expecting me to speak into the microphone of a phone. Sure I can get stand alone audio recorders and voice recorders, but with this I could subsequently edit the audio right on the device, and I wouldn't have to be concerned about the prospect of some nosey editor calling the phone I'm using to record an interview in the middle of the recording.The other use case I have for something like this is as an audio io device for a ham radio repeater. But as far as I can tell, the designers of this device wanted another Audio output device that won't work as well as feeding HDMI audio into a decent TV or stereo system that will accept that as a source.

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  • rusty0101 commented on dannyk6's instructable Smart LED Window1 month ago
    Smart LED Window

    They are, you could. Limitations include needing to switch down to 3.3 v for one of the -01 boards, and some others. If I recall correctly, both gpi0 and gpi2 are pwm, you could also do full color by treating the rx and tx as gpio pins, but if you're going to do that you would probably be better off just going on up to an -07 or -12. Still need the 3.3v converter, but since you wouldn't need the pi any more, you can replace the 5v converter with one that does 3.3v. (Though if you get a weemo board or one of the other developer boards for the -12, you can usually feed them 5v) You could also use mqtt to subscribe to a light sensor on another esp8266, or other source for getting exterior light data, or subscribe to a source of your choosing. (Would you rather have lighting relevant to the...see more »They are, you could. Limitations include needing to switch down to 3.3 v for one of the -01 boards, and some others. If I recall correctly, both gpi0 and gpi2 are pwm, you could also do full color by treating the rx and tx as gpio pins, but if you're going to do that you would probably be better off just going on up to an -07 or -12. Still need the 3.3v converter, but since you wouldn't need the pi any more, you can replace the 5v converter with one that does 3.3v. (Though if you get a weemo board or one of the other developer boards for the -12, you can usually feed them 5v) You could also use mqtt to subscribe to a light sensor on another esp8266, or other source for getting exterior light data, or subscribe to a source of your choosing. (Would you rather have lighting relevant to the people you work with somewhere else around the world?) Set up two or three around the room and get it setup to shift the lighting with the apparent location of the sun. Lots of ideas. This could be useful as well for people working (or living) in buildings with interior rooms and no windows.

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  • Low Cost Reliable & Powerfull Laser Engraver

    The question of what can be engraved with a given laser comes up fairly frequently. The problem is that the answer is dependent on more than just the power of a given laser. All that tells you is how much power the laser draws, and emits at it's focus point. Other factors include how reflective the target is in the frequencies of the laser. If you use a 2 watt red laser on black acrylic, you are going to get better results than if you attempt to use a 10 watt laser on a piece of aluminum foil. Besides the reflectivity, you also run into the question of heat transfer. a 2watt laser is likely to burn through wood because the wood will not transfer the heat absorbed from the laser faster than the material will suffer heat expansion related damage, where a 10 watt laser might have issues ev...see more »The question of what can be engraved with a given laser comes up fairly frequently. The problem is that the answer is dependent on more than just the power of a given laser. All that tells you is how much power the laser draws, and emits at it's focus point. Other factors include how reflective the target is in the frequencies of the laser. If you use a 2 watt red laser on black acrylic, you are going to get better results than if you attempt to use a 10 watt laser on a piece of aluminum foil. Besides the reflectivity, you also run into the question of heat transfer. a 2watt laser is likely to burn through wood because the wood will not transfer the heat absorbed from the laser faster than the material will suffer heat expansion related damage, where a 10 watt laser might have issues even etching polished metal.Another factor is going to be how well collimated the laser is. Not how well focused it is, but over how deep of a space that focus extends. This laser is at a fixed height, and from experience with this type of a laser, I'd be surprised if it was well collimated. As a result it seems unlikely to me that it can cut more than about 1/4" or 8mm material, and more likely not much more than 1/8" or 4mm.If you're thinking of going into cutting armor plate, you're probably not going to get the results you would like out of a 10 Watt laser. If you are looking to do custom engraving of grayscale images onto people's plastic iPhone cases, then you'll probably need far less than the 2-3 watts this instructable builds. Have fun, get an assortment of materials to test, and try different power levels. And as always be safe. Your retina is not designed to move the heat generated by absorbing the light emitted by a 10 Watt, or even a 30 milliWatt laser fast enough from the absorption site to prevent damage.

    Yes, to some degree. With some target material, you end up reaching a point of diminishing returns where taking more time doesn't give you any significant advantage, and of course costs you in time. If you build a machine that matches the spcs someone else has built, you can share experience between the two of you, but you will probably find some differences even there. The differences between what you get with a different laser, or a different laser driver can also mean that one person's results won't match another's.Disclaimer, I've been working on building my own, and this looks like a great starting point. (I have a lot of the parts, just rather busy with other projects.

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  • rusty0101 commented on JohnPark's instructable How to Make a TSA Compliant Multitool8 months ago
    How to Make a TSA Compliant Multitool

    While I generally carry a couple of Gerber multi-tools, that are not expected to be TSA compliant, I have not had a problem with traveling with them in my checked bag. If my baggage goes wandering, I can usually get a replacement at a local Target or WalMart if push comes to shove. I'm likely to have to get several other things anyway, Toiletries, more clothing, etc. Part of why I set up a travel budget after all.

    While I generally carry a couple of Gerber multi-tools, that are not expected to be TSA compliant, I have not had a problem with traveling with them in my checked bag. If my baggage goes wandering, I can usually get a replacement at a local Target or WalMart if push comes to shove. I'm likely to have to get several other things anyway, Toiletries, more clothing, etc. Part of why I set up a travel budget after all.

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