Differential Drive Programming

[skimask]

That was just superb!

I got it now how to deal with Software PWMs. Thanks a lot all of u!

Now can anybody tell me that how would i determine that what frequency do i need to supply in order to run my motor correctly. I mean what is the effect of frequency on motor?

e.g:

if i apply a pWM of freq 100Hz to a motor

and then apply a PWM of freq 1000Hz to the same motor.

What will be the difference between the two?

900 Hz.....

[shaiqbashir]

haha Skimask!

that was superb Intelligence.

WEll! Im asking about the effect actually.

I want to know what is the effect of frequency over the running of a DC motor.

Does increase/decrease in frequency affects the Running of the motor?

[mister_e]

I'm certainely not a motor expert, but i think some motor may work, somes not... or simply don't like it... or not.

mmm.... any datasheet or info on your motor?

Too low... maybe the motor could shake.. to high... maybe you will hear it.

Who's the motor expert here?

[Acetronics2]

Hi, Shahiqbashir

I realized some years ago such a thing for my large model boats ...

But I used TWO PWM outputs to get rid of the PWM soft drive ( other more useful stuff to do during this time ) ... so, it was aboard a 16F876.
With all the "whistles and bells" ... it took 3783 memory words.

That's to tell you a 16F84 will be really, really small for such a purpose ( PbP programmed overall !!! )

These days, the 18F1230/1330 offer you such features aboard a 18 pins package. ...

Worth some reflexion ???

Alain

PS: other possible solution : 1 16F84 cares of the input signals ... and drives 2 16F84s which drive the motors ...

[Acetronics2]

Hi, Steve

For such model motors it's commonly admitted ~ 3-4000 Hz for ferrite magnets ( to let them some life ...) , and what you want for rare earth magnets.

Note at higher frequencies, it will be difficult to drive the Mosfets directly from the PIC, due to their High input capacitance ...TC 442x drivers are then to be used.

soooo, in all cases, you'll have a sweet music for free...

Alain