Watch this video it is interesting but what can these LEDs be used for ???
20 years ago I had 950 turns of #24 enamel coated copper wire wound on a piece of 4" diameter PVC pipe. One day I soldered a RED color LED in parallel with the 950 turn coil and left it setting on the work bench all summer. If there was a very powerful thunder storm in the area LED would start to flash when storm was 20 miles away. A less powerful thunder storm LED would flash when storm was 10 miles away. I put the coil in the living room in winter when we have very low humidity 20° weather & no thunder storm LED would sometimes flash for no reason. Probably static electricity.
Someone is probably selling these on Ebay but I have not found them yet? I am probably doing wrong word search. These are probably $2 per 100 free shipping from China. Any ideas what these can be used for???
20 years ago I had 950 turns of #24 enamel coated copper wire wound on a piece of 4" diameter PVC pipe. One day I soldered a RED color LED in parallel with the 950 turn coil and left it setting on the work bench all summer. If there was a very powerful thunder storm in the area LED would start to flash when storm was 20 miles away. A less powerful thunder storm LED would flash when storm was 10 miles away. I put the coil in the living room in winter when we have very low humidity 20° weather & no thunder storm LED would sometimes flash for no reason. Probably static electricity.
Someone is probably selling these on Ebay but I have not found them yet? I am probably doing wrong word search. These are probably $2 per 100 free shipping from China. Any ideas what these can be used for???