This group is for discussing Van de Graaff Generators, Wimshurst machine, and other electrostatic generators, their history, theory of operation, construction and use. Any related Physics, Electrical Engineering, Material Sciences, etc topics are welcome as well as Tesla Coils and his other inventions.
... Phil: I like the inexpensive laser tachometer. It displays constantly updated RPMs until the "test" button is released. It can also recall the last
... That cheap enough for me to think about getting one - sounds like a good piece of equipment to have. I'm interested to hear how you like it after using it
Philip <pan00@...> wrote: <SNIP> ... Phil and others: I found the exact same item on eBay for US$23.80, including shipment from Hong Kong to my US address.
Phil: I was surprised to learn that many glass formulations can absorb atmospheric moisture. Pyrex, a borosilicate glass, does not have the problem. I don't