A compact copper ring with a bright green LED, turned on by a hidden microswitch.
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Green Ring
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A compact copper ring with a bright green LED, turned on by a hidden microswitch.
“Continue reading” for more information Continue reading
An amusing incidental use for this air injector is for a ‘spud gun’ or ‘potato cannon’. Jam the end of a 15 mm copper pipe into a potato then push the plug of potato down to the pressure end and ‘fire’.
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