computing mph for a weatherstation with opto (anemeter)
hi i'm looking on information on how compute miles per hour round disc has 32 shaded area or slots using photo transistor , led. i'm planning on using external interrupt on arduino detect shaded area on disc. say count how many pulses have been count in 1 second. don if diameter of anemometer d , rotates @ r revs per minute, wind speed is: s = r*d*pi/60 if d specified in inches s in inches per second have convert miles per hour. pete Arduino Forum > Using Arduino > Motors, Mechanics, and Power (Moderator: fabioc84) > computing mph for a weatherstation with opto (anemeter) arduino