AVR-Chat

--- In AVR-Chat@yahoogroups.com, "arhodes19044" <spamiam@c...> wrote:
> I have a radioshack piezo buzzer that is rated for 3-16 volts and 
a 3 
> or 5 MA.  I tested the current it draws with my dmm and I got the 
> rated MA being drawn.
> 
> I had used this device on a different project using a BX-24 which 
has 
> an 8515 as its core.
> 
> When I use it with my 128, the sound is very faint.  I tried it on 
2 
> different pins and the sound was the same.
> 
> I am pretty new to AVRs.  I am pretty sure that I have the pin set 
to 
> output (DDRx = 1 on the appropriate pin).
> 
> Any suggestions?
> 
> -Tony


Replying to myself.  Hey dummy, chech that the initialization 
function is ACTUALLY used!  I wrote the function but never called 
it!  So the pin was at the default "input", so I was only engaging 
the pull-up resistor.  

When I set it to "output" then the buzzer sang out loud and clear.

-Tony