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  • Cantoo commented on pinomelean's instructable Homemade Laser Pointer3 months ago
    Homemade Laser Pointer

    I appreciate your decision to post this, but I hoped to find something more suited to my small bit of electrical experience and know how. Most simply, it may have helped me to read more explanation about those things in the parts list. Also, where I may be able to buy, or better yet find and reuse them for nothing, or maybe from thrift stores. I have a device designed to scare away dogs that may be threatening, but I rarely use it. It has a fine laser but I can't find instructions on how to disconnect the terrible ultrasound part. I'd prefer to use the laser which my dog enjoys chasing... but now, with this new laser, the ultrasound accessory is, of course, horrible for him.

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  • Strike an Arc Exactly Where You Want It to Begin--stick Welder

    I may have found an answer to my own first question :-) I now think a spark does appear with the carbon, but just doesn't land on the work until I get to the "target". A helpful local hdwr store employee who has done lots of welding, suggested I attach a piece of scrap metal so it rests just above the targeted place for the weld. That scrap piece IS in contact with the work, but the first part of the weld is just on that scrap metal. When I drag the rod (and spark) off the scrap onto the target the intended weld begins. Oddly, his store did NOT have any carbon rods to sell, and he had not even heard of them. I've had really no luck in searching the web for carbon rods. Can you suggest where I might find them? One last thing. This technique you've given gives me a bet...

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    I may have found an answer to my own first question :-) I now think a spark does appear with the carbon, but just doesn't land on the work until I get to the "target". A helpful local hdwr store employee who has done lots of welding, suggested I attach a piece of scrap metal so it rests just above the targeted place for the weld. That scrap piece IS in contact with the work, but the first part of the weld is just on that scrap metal. When I drag the rod (and spark) off the scrap onto the target the intended weld begins. Oddly, his store did NOT have any carbon rods to sell, and he had not even heard of them. I've had really no luck in searching the web for carbon rods. Can you suggest where I might find them? One last thing. This technique you've given gives me a better LIGHTED VIEW of the work when the spark appears earlier. I have a constantly dark lens, and have shopped for "instant" darkening lens replacements for my helmet. But I've been told by that store guy that those lenses are not as safe as I've been told....& my eyes can still be at risk of seeing the ark, even for a brief moment. What do you think?

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  • Strike an Arc Exactly Where You Want It to Begin--stick Welder

    In step two (?) of using the carbon rod to help position the electrode, I may misunderstand. It seems to read that when holding the electrode, high up on the rod, it is not sparking. But when I draw the electrode down toward the end of the electrode and is touching the carbon rod, it WILL spark. Oh .... Suddenly, I think I get it. The carbon rod seems to not be carrying the current... so there's no spark until the electrode hits the metal object that the carbon rod is resting on. If that's so... I guess I've learned that carbon rods are non-conductive ??

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  • Wooden Precision Mini Router Base for Rotary Tool (with Cardboard Prototype)

    Thank you. The video is helpful. Even a few seconds of it gave me a better grasp of how the bolts worked to adjust the depth of the router bit. I suspect that my dremel tool is pretty old; at least I don't recall it having any threaded nose piece. And that video features that screw on part well. I thought that my old one just had a slide-on shaft with parallel channels or cogs running parallel to the center axis of the shaft rotation. A true Dremel router base would slide on, in line with matching cogs, or grooves, and then was fixed in place by a set screw. Ha! I'm still just looking for where I stored mine, so I can't be sure I'm remembering it accurately. When I find it, I think your design with suggest a workable option, so thanks a lot.

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  • Wooden Precision Mini Router Base for Rotary Tool (with Cardboard Prototype)

    As I am browsing thru a nice but long list of plunge-bases for my hand held Dremel (it didn't come with the base... 2nd hand thrift), I was trying to find a good design for attaching the base to the dremel tool. I like the looks of this base, but like lots of posts here on Instructables, the text is pretty linear: not broken down as in a charted diagram. I don't see how the base is to be secured to the tool (or vise versa :-). Were is that part of the instructions, or can you briefly say how that attachment is done?

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  • Cantoo followed mikey772 years ago
      • 4D Printing: Make a Collapsible Lantern
      • 3d Printing: Zizzy-A Robot Assistant
      • 3d Printing Servo Controlled and Other Valves