PIC-based support tachometer?

I want to make a speedometer PIC base. Basically what I do is mount a reed switch on the bike and the wheel rotates a magnet on the ingredients on and off. Therefore, I want my microcontroller read the data and show that LCD. What should I choose PIC? Will I need more than the reed switch and the microcontroller and the LCD? How I can do that?

You will need a supply for the operation of the microcontroller and the LCD. The siwtch can bounce. Thus, your program should provide an elimination arragement rebounds. Sometimes it is useful to reduce the rebound effect with the establishment of a capacitor input of the microcontroller to GND. This supply stopped, and change is through this capacitor. Some preliminary examinations will tell you how many shares will go through a rotation of the wheel. based on distance, speed, etc. can be displayed, if you know the diameter of the wheel. You will need a tantalum capacitor 100uF and 0.1uF insurance, which connected through the PCB to mount it all to microcontroller.Then

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