Were you feeling the need for new tech to replace the switches that control direction and speed on your cordless screwdriver? Us neither, but we're not the braintrust at Black & Decker, which just launched the Gyro 4V Max, the "world's first motion-activated screwdriver." The company put an InvenSense MEMS gyroscope in the new model, so all you have to do to change the direction or speed is rotate your drilling hand o
