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  • skrubol commented on LeoP20's instructable European 4 in 1 Chainmail Shirt1 month ago
    European 4 in 1 Chainmail Shirt

    So these are left as open links? (IE C's, not O's?)

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  • skrubol commented on Phil B's instructable Twist Drill Sharpening Helper1 month ago
    Twist Drill Sharpening Helper

    In my (limited) experience with a Drill Doctor, they can be very effective, but they aren't as easy to use as you would think. If you don't follow the instructions to the letter, (and iirc there are some counterintuitive things in the instructions,) you will not have good results. I think the DD should be good for sharpening a bunch of bits at once, because if you've got a bunch, you can afford to sit down and re-read the instructions and do it right. DD regrinds split points as well. I think if I only had 1/4" and larger drills to sharpen I'd do it by hand. A jig of some sort is more critical on the smaller bits.

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  • skrubol commented on KJMagnetics's instructable World's Simplest Electric Train1 month ago
    World's Simplest Electric Train

    Close enough to pass electrical current through the magnets to the copper.

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  • skrubol commented on michael.j.feierstein's instructable Table Saw Rust Removal1 month ago
    Table Saw Rust Removal

    For preventing rust I've heard CLP (Cleaner Lubricant Preservative) by break-free is one of the best out there. I can't remember which formula is best for tools, but it's a much heavier oil that leaves a thin, slippery coating.Probably worse than the WD if you're going to be using it with wood right away, but I would expect it to do much better at holding the rust off if you're storing it. You'd probably need to clean the CLP off with something like WD-40 before use.

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  • Industrial Isolation Transformer From Trash

    Aren't ballast transformers often current limiting (usually with some magnetic gap or something similar to how simple AC stick welders work.)?

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  • The Maven Box: an Arduino Controller for Software Developers

    The code looks like it'll only count a transition from 00 states to 01 or 10 states. Other transitions will be ignored. Effectively it'll only count 1/4 of the transitions. Is this the intent?

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  • How to Unscrew a Nut that's Stuck on a Bolt (without ruining threads)

    Can't buy MAPP in the US anymore. I guess a few too many cylinders blew up or it's bad for the environment or something. The stuff sold now that resembles it (MAP-Pro) is somewhere in between propane and MAPP.

    I've read this elsewhere as well. Though that's the only quantified study I've seen.Heat still works better, assuming that's an option. Nothing beats an oxy-acetylene torch, propane works as well.

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  • skrubol commented on comsa42's instructable Carbon-Fiber Electric Skateboard Deck3 months ago
    Carbon-Fiber Electric Skateboard Deck

    XPS = eXtruded Polystyrene (pink or blue wall board insullation) and EPS = Expanded Polystyrene? (usually white, like disposable coolers and rigid packing material.)

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  • How to Make Drinks Coasters With Nails Inlay

    Evolution makes blades as well and they're decent blades. Looks like the only table saw they make is a 10" 2500 RPM saw, gear drive, brushed motor (looks like.) Looks to be the same motor assembly as out of their 10" miter saw (which I have.) One negative of their 10" saws, they have a 1"(25mm) arbor, which won't fit most blades. Their general purpose blade is good for wood, but pretty lousy for aluminum, chips get stuck between the teeth too often. Their aluminum only blade is $100+ and I've yet to find a 3rd party aluminum blade with a 1" mounting hole.Most belt drive table saws can be under-driven if you replace the pullies. I've done this on my Craftsman and now have a 2-speed saw, 3450 RPM for normal cutting, 1725 RPM for cutting aluminum (with the ap...see more »Evolution makes blades as well and they're decent blades. Looks like the only table saw they make is a 10" 2500 RPM saw, gear drive, brushed motor (looks like.) Looks to be the same motor assembly as out of their 10" miter saw (which I have.) One negative of their 10" saws, they have a 1"(25mm) arbor, which won't fit most blades. Their general purpose blade is good for wood, but pretty lousy for aluminum, chips get stuck between the teeth too often. Their aluminum only blade is $100+ and I've yet to find a 3rd party aluminum blade with a 1" mounting hole.Most belt drive table saws can be under-driven if you replace the pullies. I've done this on my Craftsman and now have a 2-speed saw, 3450 RPM for normal cutting, 1725 RPM for cutting aluminum (with the appropriate blade.) Would work fine for this as well.

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  • skrubol commented on JON-A-TRON's instructable 3D Printed Wireless Lantern3 months ago
    3D Printed Wireless Lantern

    No current limiting for the LED? An LED like this direct driven by a lithium ion battery won't last long, especially with the minimal heat dissipation of a little LED star stuck in a plastic box.I'd also think the brightness varies significantly with the charge of the battery?

    A 2-3 ohm .5+W resistor will protect the LED, but not help with the brightness variation.I thought I'd be able to find an inexpensive LED driver for running from a single Li-ion cell easily, but I can't.I did find a basic driver chip that may work:http://www.sunrom.com/p/amc7135-dc-led-driver-ccThere are some example circuits on the page.

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