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  • Industrial Isolation Transformer From Trash

    Here's something to think about, a lot of modern electric drills, sanders, vacuum cleaners ect. have an emblem on the data plate, which is a square within a square, this means that the item is double insulated, I.E. allowed to run with only two core cable, This is one of the reasons why you don't see many metal cased drills, similar to the the old "Wolf" drills, the real problem with the metal casing was that as the drill brushes wore down they scattered carbon dust through the rear ventilation slots and straight on to the operators hands, in damp conditions these created a direct link between the hand and the "Live" brush gear, I've known friends who have used these outside and couldn't let go of them, the only way their still alive, was by a co-worker kicking the ...see more »Here's something to think about, a lot of modern electric drills, sanders, vacuum cleaners ect. have an emblem on the data plate, which is a square within a square, this means that the item is double insulated, I.E. allowed to run with only two core cable, This is one of the reasons why you don't see many metal cased drills, similar to the the old "Wolf" drills, the real problem with the metal casing was that as the drill brushes wore down they scattered carbon dust through the rear ventilation slots and straight on to the operators hands, in damp conditions these created a direct link between the hand and the "Live" brush gear, I've known friends who have used these outside and couldn't let go of them, the only way their still alive, was by a co-worker kicking the tool out of their hand, (by the way I live in the U/K with 240 volts)

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  •  Generate Electricity Using Footwear-Charge Your Mobile(Piezo Generator)

    I'm still trying to work out why you need a voltage sensing switch in this position, it may just be necessary between the battery and the USB socket ? 4007 diodes have a very high reverse resistance and the capacitor will use very little power once It's charged up Or have I missed something !

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  • bodger-bill commented on balsuryana's instructable From Old Motors Into Signal Booster4 months ago
    From Old Motors Into Signal Booster

    This may not be quite true !, by sanding soft wire you are effectively giving it a greater surface area, imagine a cog wheel if you had no teeth on it, it would just be the surface area of the diameter, now cut the teeth and check the exact external surface area ?

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  • bodger-bill commented on Penolopy Bulnick's instructable Unusual Uses for Mouthwash4 months ago
    Unusual Uses for Mouthwash

    I can't completely vouch for this (having a great shortage of teeth myself) but I have on good authority that the standard version of Listerine has a chemical in it that melts the glue that holds caps onto teeth, probably why it's recommended by many dentists ?

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