I'm trying to produce bird tweet on piezo-buzzer using atmega8l timer1 pwm and i'm also got succeeded in that but the problem is that the volume is too low. I want to increase its volume . how can i amplify square wave coming from pwm channel A ? My PWM freq is 31.250khz. and it is battery operating where the battery ratting is 3.7V 55mAh LiPo battery...

 

use an audio amp or use a h-brigde cmos buffer ic like the CD4011 /cd4049, feed a complimentary output to transistors or cmos gate ic.

 

thank you, but please if possible can u provide any kind of schematic for that

 

if you post your circuit i will help you to modify it.

 

actually i had directly connected buzzer positive terminal to OC1A pin (PB1 pin) of atmega 8l and its negative terminal to ground

 

Ok so can you make an alternate comp output on your atmega,

or use the cd4049 chip to make a two gate driver,input the signal as per the diagram

 

thank you will need to go through datasheet of cd4049 and I will try it and i will let you know about it.... thank u very much