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Step 3But...
I had problems with noise from the drill motor. Not only did the crusty old drill emit grinding noises and burning electric smells, but it was spraying out interference that was being picked up by the long unshielded cable.
An RC filter at the counter helped some and it worked good enough for what I was doing. But shielded cable and a non-half-dead drill motor would be the way to go.
R1 is a pull up resistor.
R2 and C1 are a filter.
Sorry, I don't remember the values. Maybe start with 10k ohms and .01uF.
An RC filter at the counter helped some and it worked good enough for what I was doing. But shielded cable and a non-half-dead drill motor would be the way to go.
R1 is a pull up resistor.
R2 and C1 are a filter.
Sorry, I don't remember the values. Maybe start with 10k ohms and .01uF.
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Jun 25, 2007. 9:33 PMKralc
says:
I like the Hall sensor imput, and your filter will make it more usable for noisy motors. But what did you use as a counter? I could use a similar device, can't find a mechanical one, looking to electronic type.
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