Roundabout Daughterboard PCB

From the book "Intermediate Robot Building" from David Cook, this is one of the three project PCBs.

This daughterboard unit serves as the base to an add-on microprocessor (not included) that supplants the 74AC14 logic chip that is the original brains on the motherboard.

Note: This is the bare printed circuit board only, and assembly instructions are part of the book "Intermediate Robot Building" and support website.