An apparatus for lifting and lowering a toilet seat assembly includes a motion sensor, a motor assembly, a first gear located on a shaft of the motor, a second gear interfaced with the first gear, a drive shaft interfaced with the second gear. A lever is coupled to the drive shaft for lifting the toilet seat. The apparatus may include a bearing housing that includes a movable lead screw with a detent. A first end of a first spiral spring is connected to a slot of the drive shaft within the bearing housing. The first spiral spring is wrapped around the drive shaft. A second end of the first spiral spring is located in a path of the detent. The hubs of the second gear and the drive shaft may be connected together using a crank shaft. A microcontroller may control the motor assembly and be programmable using the sensor.