1.Mechanical error protection,The power supply will be cutoff automatically(to avoid the equipment is burnt)when the motor fail to work becauseof breakdown or it run continuously more than4±1s.
2.This paper gave design of a bandpass filter,which was composed with highpass and lowpass,based on LMF100 and MPU. The cutoff frequency of the bandpass filter was produced by the outer clock,with characters of precise and controllable cutoff frequency,lower power of system.
