Harold P. Strand

In the mind of the electrical genuis it's named for, it was a practical transmitter - but our version is strictly for thrills. Spectacular fireworks include a ring of fire scribed by wire pivoting on...

Miniature in size only, this physics classroom project packs 60,000 volts of power at 500,000 cycles per second. Yet it’s safe! You can make spectacular demonstrations with this Tesla coil (Fig. 1)...