I create a new thread about this for a sake of clarity.
I’m creating a pcb to handle EMX. I want to play melody with a piezo. I 've seen that a piezo class is available on netmf.
[ulist]Does it works only for the IO10 of the EMX
can we use this class to play melody on IO10[/ulist]
I looked into the schematic for Cobra and the piezo is directly connected to IO10 through a 330Ohm resistor. I’m a litlle bit surprised by that if we consider the recommended circuit for this piezo:
Should I keep the cobra circuit if I use an other IO (i.e. IO15/PWM0), it seems to me that the IO will not drive enough current to supply properly the piezo but I may be wrong…
All of this is not clear to me