(EDIT) More Details and Video added in post #2
Coming
Just finished is this NJK-5002C Hall Effect/Arduino tachometer. Details coming shortly. It works like a charm. Just tape a magnet to a rotating object, press the button on the side of the tach and it displays the rpm.
BUT, as happens sometimes when working too late at night on a project, I crammed the project between 2 pieces of 13mm bamboo flooring with a cavity neatly milled out. I knew the project was working so I glued the 2 halves together. Perfect!
No.
I had calibrated the tach with a hand drill, but now, checking a 1725rpm bench grinder the tach reads 1938rpm instead of 1725. Fixing that is just a number change in the little Arduino code. Only problem is I can't get to the USB connector on the Arduino!!! Oh well, I will pop the 2 halves apart and carefully calibrate it. Embarrassing.
Lloyd
Just finished is this NJK-5002C Hall Effect/Arduino tachometer. Details coming shortly. It works like a charm. Just tape a magnet to a rotating object, press the button on the side of the tach and it displays the rpm.
BUT, as happens sometimes when working too late at night on a project, I crammed the project between 2 pieces of 13mm bamboo flooring with a cavity neatly milled out. I knew the project was working so I glued the 2 halves together. Perfect!
No.
I had calibrated the tach with a hand drill, but now, checking a 1725rpm bench grinder the tach reads 1938rpm instead of 1725. Fixing that is just a number change in the little Arduino code. Only problem is I can't get to the USB connector on the Arduino!!! Oh well, I will pop the 2 halves apart and carefully calibrate it. Embarrassing.
Lloyd
Last edited:
