The sensor part of the sensor-watch is a flex PCB breakout that allows you to swap in whatever sensor fits your needs. The first to be reflowed at [Joey’s] bench is a BME280 humidity sensor ...

His latest project is right up there, too: a single PCB that folds up into a four-wheel motorized rover. The key to [Carl]’s design lies with his PCB brushless motors, which he has been refining ...