tachometer and speed control

Thread Starter

h.d

Joined Oct 22, 2007
150
hi all
am need help about how to measure motor speed by tachometter
and take the output of tacometer as feedback signal to PIC controller
by which i controle the speed of motor by PWM?
i know that the output of the tacho. is voltage and its analog signal
and i think i should ise ADC to enter that signal to PIC
finally "am not familiar with PIC ,know am tray to study it"
and i will use 16F877A
 

beenthere

Joined Apr 20, 2004
15,819
The frequency of the signal is more informative than the waveform itself. Counting the tach output for a period of time is easy to do with a PIC. There are many threads on this site that deal with PIC microprocessors and their applications. There is also a ton of stuff on the PIC's website.

That is the cart before the horse, however. You will first need to get the programmer for the PIC chip and learn how to write code for it.
 

Thread Starter

h.d

Joined Oct 22, 2007
150
ok , am search in th web and dont find my requiste........
is thier any body to help
my problem is how to use the signal of the sensor and make it compatable with the pic
 

beenthere

Joined Apr 20, 2004
15,819
Can you characterize the tach output? The only thing necessary to make it compatible is a voltage swing within the limits of the PIC's Vcc & Vss.
 
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