In one example an electronic device comprises a controller, a chassis comprising a first section and a second section, and a hinge assembly to connect the first section of the chassis to the second section of the chassis comprising a housing, a first shaft rotatable about a first axis, a second shaft rotatable about a second axis, a belt drive assembly to couple the first shaft to the second shaft, and a tension assembly to apply a tension to the belt drive assembly. Other examples may be described.