This is an optional part you can add onto MobBob V2 to give him arms.
The "Socket" parts mount on either side to provide peg holes for MobBob's shoulders. Arms then plug into those pegs.
I'm planning to created some fully 3D printable arms, but I have not done that yet. (However, I've provided a template for the pegs to enable others to create their own arms if they wish!)
While I haven't provided printable arms, I've did upload a shoulder piece that features a Lego Technics-compatible beam. That piece enables you to make arms using Lego Technics pieces.
I've made 2 sample arms using Technics pieces. One is a static arm with a poseable claw. The other arm has a Sharp IR Distance sensor strapped on.
To support the Sharp IR Sensor (and other future sensors), I've added 2 connectors to the Bluno Beetle. These connectors provide 5V, Gnd, and an Analog pin. These connectors can be used with a wide variety of sensors, and should enable different sensors to be swapped in fairly easily.
With this new easy-to-swap arm system, I wanted to make it possible for MobBob to be fitted with a wide variety of sensors. This can enable MobBob to be used as a platform for learning about and experimenting with different sensors.
I haven't updated the software, but I will be updating the Arduino code to support the Sharp IR sensor, and also updating the Android app include new functionality that makes use of the sensor. I'll post a video once that's ready.