#low-pass filter

[timestechnow]

Exxelia Miniature Low-Pass Filter Capacitors now at New Yorker Electronics | TimesTech

NORTHVALE, New Jersey, USA – New Yorker Electronics is distributing two series of Exxelia Technologies Multilayer Ceramic Discoidal Capacitors used for power supply and digital signaling. The FC030 is feedthrough mounted on shielding enclosures and the FCM030 series is designed to prevent EMI on printed circuit boards. These low-pass filter solutions are mainly used for EMI […]

[rocbuilder]

Accelerometer algo

Okay, so let me get this straight, i’ve been thinking about this for 2 weeks and barely have a conclusion

So how we get stroke rate is by measuring acceleration by use of a 3 axis analog accelerometer. The accelerometer being analog and all, gives a waveform where the origin point, or long average, is more than zero. In addition, the values might be choppy, large amounts of inaccuracy.

problem 1: choppy values. Solution: implement an smoothing function

Problem 2: origin not 0 Solution: subtract long average

Problem 3: 3-axis Solution: summation by Pythagoras theorem

But now arises a new problem where Pythagoras theorem always produces a positive value

Problem 4: pythagoras theorem always positive Solution: find axis with largest value, if axis more than origin, result is positive, if less than, result negative

So after all that, the waveform is something useable. Next is to read it, find the peaks…