Surgical systems include a handheld surgical device having an end effector and a drive assembly configured to drive the end effector, a foot pedal configured to receive input mechanical energy from a user and to output mechanical energy, and a converter. In systems, the drive assembly is an electrically-powered drive assembly and converter is configured to receive the output mechanical energy from the foot pedal and to output electrical energy to the electrically-powered drive assembly. In other systems, the drive assembly is mechanically-powered and the converter is configured to receive the output mechanical energy from the foot pedal and to output a different mechanical energy to the mechanically-powered drive assembly.
