100hz clock pulse needed
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any electronics people know the best way to a get 100hz clock pulse from 60hz mains?
the output of a full wave rectifier should be 120hz, right? so in theory, I should be able to divide that down to 100, but I don't quite know how.
I want to take this 100hz and make a clock display that will display the time down to the 1/100th of a second, so:
HH:MM:SS:XX, like a stop watch.
I plan on feeding this 100hz clock pulse to an arduino as an interrupt to advance the time.
google tells me how to get an arduino to generate 100hz, or how easy it is when I'm not in north america.