MicroPython Forum (Archive)

Hi, friends.
Does anybody know where can I find information about voltage and current ratings for the Pyboard D pins?
Any information about sink and source maximum current would be welcome.
I wonder if I can connect any load directly (a buzzer, for instance) or if I should use a buffer or a driver.
Thanks in advance.

In the datasheet for the STM32 variant that that board uses.

Anything other then driving a logic gate or a small transistor will probably require a transistor or two to drive something like a relay or buzzer.

I guess I found it in the data sheet for the SF6W STM32:
https://www.st.com/resource/en/datashee ... f767zi.pdf
Maximum sunk or sourced current per pin: 25mA.
Maximum total output current sunk or sourced by sum of all I/Os and control: 120mA.