We were using iPads, and they worked well, but it's worth mentioning that you do need a device that support Bluetooth low energy (e.g. I think that whether it's suitable or not for a particular school now depends as much on the platform being used.Īfter seeing WeDo 2.0 introduced to 60+ primary teachers across two workshops last week, I was stunned by how easy it was for the teachers to get started, particularly in terms of the curriculum support built into the software. In this way, the whole gear structure could work.I agree it's a very detailed and honest review, but I think that's a much too simplistic conclusion to draw. Through using the compound gears, the 24-tooth gear could mesh with the 8-tooth gear properly by arranging their shafts 2-stud distance apart on the green beam. Therefore, their shafts could not be arranged on the green beam. Assuming the distance between two adjacent spin holes of a beam is one-stud width, the shaft distance of the 24-tooth spur gear and the 20-tooth black gear is bigger than 2-stud width, but less than 3-stud width.

So what is the purpose for the model to use the compound gear? Using compound gear could change the output rotation speed, but one more important reason here is the distance mismatch. One example of compound gear is shown in the below diagram. The 24-tooth spur gear connects the output shaft to drive the wheels finally. The 8-tooth grey gear then meshes with a 24-tooth spur gear to further transfer the rotation power downward. The 12-tooth black gear spins and brings the 8-tooth grey gear to spin at a same speed. The 12-tooth black gear and the 8-tooth grey gear are fixed on the same shaft to form compound gears.

Please pay attention to the compound gear structure here. It meshes with a 12-tooth black gear, which then transmits the rotation power alone the compound gear train. One 20-tooth black gear is just the one I mentioned in the above bevel gear structure.

Two black gears are meshed together, which I indicate with red arrows.

The below diagram shows the model in the bottom view. Compound Gears to Transmit Power to Wheels

Motor wedo 2.0