Mini stereo set protection circuit based on piezo-resistor

The utility model discloses a mini stereo set protection circuit based on piezo-resistor, including piezo-resistor R1, relay J, transformer W and diode D. The utility model discloses mini stereo set protection circuit utilizes the characteristic of piezo-resistor voltage nonlinear variation, has higher absorption and a suppression ability to excessive pressure and the spike who exists among the mini stereo set supply circuit, long service life, surge reinforce in addition, and the basic electronic components's of while circuit use combination, no chip structure has increased interference immunity, can be to the effectual protection of mini stereo set, it is interference-free to guarantee to export tone quality again, is fit for using widely.