Circuitry for Tachometer 5

[FeX32]

Hello all,

I am in the process of designing a control system for a DC motor. The motor has a voltage tachometer installed. My question is, what kind of circuitry is best suited to use between the tachometer itself and the A/D interface so that I can use this as an accurate feedback.
I read about voltage followers/buffers. Are these suitable? If so, what are the advantages/disadvantages of these and how can I construct one?
Thanks for any input.

Fe

 

[FeX32]

Yes I am seeing these bounces following the ADC.
I did add a 'heavier' resistor and it did calm down a little, so I presume you are correct.
I will try different combination's of R's and C's.
Thanks for your input.



Fe

 

[GonzaloEE]

If you feel more comfortable with programming than designing filters, try averaging your samples, or adjusting the A/D clocking to the ripple frequency when possible.