Using Sound cmd on 16F88

[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.

[BigWumpus]

I've tried a lot with piezo-summers... (without any circuit in them!)!

Forget it !

Buy readymade Piezo-beepers for intrusion-detection !

Piezo-beepers are allowed to have 24 Volt accross them. So I have used a circuit to double the power (5V -> 10V) with one pin of the PIC and loaded a 1000uF condensator. Then I use a MOSFET-driver ICL7667 to drive the beeper from this 10V. It is loader, but using some cheap magnetic beepers from digisound is much more easy....

;-)

[Gator_sound]

BigWumpus,

Do you have a part number or a particular place where I can purchase a ready made piezo-beeper? thanks.