i am a noob and learning 8051 coding. i want to know how can i use PWM to write a speaker which can emit diff sound (do,re,mi,etc.) by using 2 pins only. thanks.
HI.
the page from master neil is good.
look at the para "Choosing a suitable NPN transistor"
u can simly have the speeker for the load.
Always yo're freind.
Zeusti.