Hi ,
i'm studying a solution to build a digital tachometer / Revolution counter with a pic16f877 for my gokart.
i'm a litle bit confused about the input signal: how can i pick up signal for pic?
i've considered two possibility:
1) i can pick up the spark signal form the engine with an inductive sensor (i wire near the spark cable) but in this case i ask you how this signal can be applied to pic? i immagine this is a very noised signal: is there any circuit for filtering / adapt it?
2) i can measure the rpm of the weel with an hall effect sensor but also in this case i need a circuit schema for adapt the sensor output to the pic (as far as i know many hall sensor output signal range is from 2,5 to 5 volt and so it's not ok for a square wave pic cunter input)
thankyou all
i'm studying a solution to build a digital tachometer / Revolution counter with a pic16f877 for my gokart.
i'm a litle bit confused about the input signal: how can i pick up signal for pic?
i've considered two possibility:
1) i can pick up the spark signal form the engine with an inductive sensor (i wire near the spark cable) but in this case i ask you how this signal can be applied to pic? i immagine this is a very noised signal: is there any circuit for filtering / adapt it?
2) i can measure the rpm of the weel with an hall effect sensor but also in this case i need a circuit schema for adapt the sensor output to the pic (as far as i know many hall sensor output signal range is from 2,5 to 5 volt and so it's not ok for a square wave pic cunter input)
thankyou all