First, thank you for the feedback. I’m think Scratch and Picoboards are great fun.

I’m not sure I understand your question, however. The Picoboard outputs a signal to Scratch, which you can use via the sensor blocks. Sounds like you have that part down. If you’re question is about going to the other way, outputting a signal from Scratch, then that’s not possible, at least not to my knowledge and definitely not without some hacking.

thanks!