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JohnW839

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  • JohnW839 commented on SanderW8's instructable Industrial Bookshelf Cabinet6 weeks ago
    Industrial Bookshelf Cabinet

    I love it. It's a thing of beauty. I don't know how to weld, but have a friend who does. Might ask him if he's interested in making one. :-)

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  • Wu-Tang Clan Pizza Cutter! (Made From an Old Table Saw Blade)

    Five stars for the video! By far the most interesting and creative Instructables video I've ever seen. The pizza cutter is cool too. I think I would have rounded off those sharp corners though.

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  • JohnW839 commented on TheDIYPlan's instructable DIY Night Light Treasure Chest4 months ago
    DIY Night Light Treasure Chest

    Very cool! I think I would have used a much smaller light bulb (candelabra-based actual night light bulb or similar), but whatever works for you is great. Good job. Looks easy enough that even I could build it. Burning with a torch was something I would not have thought out. Nice touch.

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  • JohnW839 commented on Rosh_k's instructable DIY Homopolar Motor (Make Battery Spin)6 months ago
    DIY Homopolar Motor (Make Battery Spin)

    Watch the video. The title is misleading. The battery doesn't spin, the coil of wire does, sort of.

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  • JohnW839 commented on steparak's instructable CC/CV Power Supply 8 months ago
    CC/CV Power Supply

    Very nice looking and useful project. Would you please share what meter you used? Also, please explain about setting up the supply for CC. And can you measure current independently of voltage (doesn't look like it from the schematic--no switch)?

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  • JohnW839 commented on toyfanter's instructable The Dancing Robot9 months ago
    The Dancing Robot

    Sure would like to see a video showing the robot in action. :-)

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  • JohnW839 commented on Thiwe's instructable 50's Philips Radio Saved From the Grave9 months ago
    50's Philips Radio Saved From the Grave

    I love those old radios, and this project made very good use of one of those beautiful and interesting old cabinets. One suggestion: Since the LED strip is a constant (non-changing) load, you could have just used a voltage dropping resistor between the LED strip and the 24V power supply saving the 12V power supply for another project. It would be cool to have an actual radio receiver built into...

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    I love those old radios, and this project made very good use of one of those beautiful and interesting old cabinets. One suggestion: Since the LED strip is a constant (non-changing) load, you could have just used a voltage dropping resistor between the LED strip and the 24V power supply saving the 12V power supply for another project. It would be cool to have an actual radio receiver built into this project, but I'm not sure how you would be able to change the stations. I suppose it would depend on the radio. Then of course you'd need a way to get the radio audio signal into the amplifier. Maybe too complicated to mess with. Just a thought.

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  • JohnW839 commented on tonyfoale's instructable Manual Thread Tapping Machine10 months ago
    Manual Thread Tapping Machine

    Wow! I certainly wouldn't drive a tap with an impact driver. You must only drive very large taps.

    That's a fantastic project. Wish I had your skills and machine shop, but unfortunately, I have neither. Also don't have a "scrap bin" with anything more that an assortment of screws, bolts and nuts and perhaps a spring or two. Great Job on the video too.

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  • JohnW839 commented on Irish pirate630's instructable DIY EMP (cheap!)10 months ago
    DIY EMP (cheap!)

    Just to clear up one point, this device will not "short out" anything. To "short out" means to connect two power wires or signal wires together or to connect a power or signal wire to "ground". This device generates short-range broad-band radio frequency "noise" that causes nearby devices that use radio communication (WiFi, cell phone, etc.) or contain a ...

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    Just to clear up one point, this device will not "short out" anything. To "short out" means to connect two power wires or signal wires together or to connect a power or signal wire to "ground". This device generates short-range broad-band radio frequency "noise" that causes nearby devices that use radio communication (WiFi, cell phone, etc.) or contain a microprocessor chip (just about anything these days) to malfunction . It's a rather dangerous toy to play with, so please be careful. If activated in or near a moving automobile, it could cause an accident. It's quite possible that this device is illegal. Forewarned is forearmed.

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  • Motion Activated Automatic LED Stair Lighting With Arduino

    This is a great and very useful project. Only problems I see are access to AC power for the DC power supply and packaging the electronics attractively. Another solution to a dark stairway is to have an overhead fixture and use a motion sensing system to turn on a standard AC light bulb (preferably LED of course). Many stairways will already have a light fixture (it should be a building code req...

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    This is a great and very useful project. Only problems I see are access to AC power for the DC power supply and packaging the electronics attractively. Another solution to a dark stairway is to have an overhead fixture and use a motion sensing system to turn on a standard AC light bulb (preferably LED of course). Many stairways will already have a light fixture (it should be a building code requirement). I believe you can buy fixtures with the motion sensor built in.

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