Proto- The Proto layer is useful for designing new Tower layers. It provides a blank prototyping area with plated holes, and solder points for every I/O pin passed up and down the Tower from the core processor on the Foundation. [details...]

PicProto- The PicProto layer provides an even more powerful way of creating new Tower layers. In addition to blank prototyping area and pin breakouts from the Foundation, this layer also has a PIC16F876 on-board for easy tie-in to the main I2C serial bus. [details...]