Using Sound cmd on 16F88

[Gator_sound]

Hi Steve,

Its a cheap Radio Shack Piezo Element 1500-3000Hz Buzzer (#273-073):

I get a working continuous buzzing sound in it but its not loud enough. I used a function generator and it produced a better sound than what I'm getting from my PIC. Hope this info helps.

[sayzer]

...1500-3000Hz.. I used a function generator and it produced a better sound than what I'm getting from my PIC...

Since you are using Note 127, you are driving your piezzo by 10,000Hz.
Check Sound command details to find the correct Note number which should give you a frequency between 1500-3000Hz. So g-spot of this piezzo has been found & touched!

LMAO! i guess it would depend of the hardware

Provide your piezo part # so we could try to find the g-spot of it !

The hardware is ticking like a Swiss clock. No doubt on that!
But, sometimes when you know for sure that you are not even close to g-spot, you still get a loud sound. How about that?




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[mister_e]

But, sometimes when you know for sure that you are not even close to g-spot, you still get a loud sound. How about that?

I could disgress and talk about using the right i/o but...

Gator, use HPWM and a loop like that

Freq var Word

Start:
    For Freq=1500 to 3000 step 100
        HPWM 1,Freq, 127
        Pause 200
        next
    Goto Start

You'll notice some 'volume' change on every different frequency, choose the louder one. Using the Sayzer driver circuit will add to your pleasure.

OR use your function generator, measure the frequency once you hit the louder frequency, and apply it on the HPWM command.

[Gator_sound]

Hi mister_e,

Are you talking about using the HPWM on the 16f88 or a PIC with a physical PWM pin?

[mister_e]

Both.. THE PIC16F88 have a built-in PWM module... also named CCP.

[Gator_sound]

mister_e,

Thank you and sayzer for the information. If its not too much of a hassle is it possible to provide an example for the PWM using the CCP register. I'm still trying to get used to programming in basic. Programming in assembly has thrown me off when I'm thinking about programming in basic. Thanks in advance.

[mister_e]

HPWM will handle it for you. if 8 bit resolution is enough, it's the easiest way.