Haptic feedback control assembly

A control assembly provides haptic feedback to the user of a device such as a smartphone. The assembly comprises a shape memory alloy (SMA) actuator 8 arranged to deliver haptic feedback by moving a button 2 relative to the case 3. In one embodiment, one SMA actuator delivers haptic feedback by moving plural buttons relative to casework (fig. 5). The plural buttons may be formed by a common member 13. In another embodiment, the assembly comprises a button 2 with a hinge 61 connecting one side of the button to the casework (fig. 9). The hinge may be a simple pivot. The SMA actuator 8 causes the button to rotate about the hinge.