After this tedious step, he designed a PCB that hosts an Arduino Nano to accept input, two MCP23017 GPIO expanders to give it enough outputs, and CD4066BE CMOS switches to trigger the connections.

The Ultra 2 relies on third-party apps for uploading and exporting GPX routes, whereas the Venu X1 benefits from full-colour, built-in mapping, with an altimeter, barometer and 3-axis electronic ...