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  1. Batteries

    Picking a power source for the robot was the next big challenge. We need to run quite power hungry motors and we're planning on using a Pi4 so we need a decent battery capacity.

    A Bosch Power4All power tool battery.
    A Bosch Power4All battery pack, this is the 4Ah battery pack.

    The first idea that sprang …

  2. Motors

    Obviously we need motors for our robot. The easiest option is to buy motors with a reduction gearbox already attached. This will reduce the speed but increase the torque (how "strong" the motor is).

    Picture of a small yellow platic motor and gearbox common in toy robotics.
    One common and cheap option for motors, a bit small for my ambitions.

    There are a …

  3. Starting Design

    A few weeks ago now we started discussing ideas for what our robot might look like. I asked John to come up with some ideas and he was initially enthusiastic about drawing. His idea of a robot does seem to be mostly based around a somewhat boxy but humanoid form …