You might have noticed from the previous log that there is a LED shield and a buttons shield in the works. In fact, I already have the PCB for the buttons shield, I just need to figure out what resistors to use for it. I'm still waiting for the PCB for the LED shield.
Today I designed two more: an audio shield, with a small amplifier and a speaker, connected to the DAC pin of the Trinket M0, and a prototyping shield, which is just an empty PCB with a lot of empty holes — for quick-and-dirty shields as you need them. I will write about them more when I get them to work.