Tactile/haptic interface component consisting of actuator and controlling unit therefor for use with handheld personal computers, namely, personal digital assistants; mobile phones; analog/digital controllers for video game, namely, joysticks; televisions, video tape players/recorders, personal computers, car navigation computers, digital still/video cameras, digital audio disc players/recorders, digital video disc players/recorders and remote controllers for all the aforesaid goods; handheld personal computers, namely, personal digital assistants