Designing the control board for the rrMM may be the most challenging task when building the boat. As the boat is typically too small to carry, e.g., a netbook, a small custom board was designed using EAGLE. We will subsequently give you all necessary information to build a board, though getting the components and soldering some of the parts can be challenging.
Below you will find some information regarding boards we have build that actually work. However, we don't give any guarantee with respect to these boards, and you should carefully check the design before having a board built.
This board is designed for the ublox LEA-4T chip. While there may be advantages in placing the GPS chip on the main board, we mostly wanted to be able to quickly exchange a failing parts, as the GPS chip is rather expensive. The LEA-4T was chosen to allow for DGPS, however, cheaper chips may be sufficient to get started. List of parts Circuit layout
Some sensors like the accelerometer or the compass are integrated with the main board. However, one essential information for sailing is the wind direction, for which we built a very small sensor based on a magnetic encoder. So far, these sensors have proven surprisingly robust, though getting the ball bearings fixiated can be tricky.