A piezoelectric electrical-energy generator was presented to provide endless and real-time electrical energy for remote controls. In view of the operation method and load performance of remote controls

pulse-excitation and press- excitation were utilized to impulse a piezoelectric cantilever generator to generate electrical energy. The influence of the two exciting methods on electrical energy generation and effective duration of power supply (EDPS) to constant current load was investigated experimentally. The results show that the piezoelectric generator achieves more electric energy and longer EDPS under pulse-excitation than that under press-excitation. When pulse-excitation is used

the EDPS decreases with the increasing of the current load

and there is an optimal natural frequency for the piezoelectric generator to achieve the longest EDPS. The electrical energy from the piezoelectric generator measured 40x15x0.5mm is available for a car remote control to sent signals successfully

and the information-transfer distance is up to 15m.