A modular switch and control system for use in a motor vehicle is provided, that is easily and flexibly adapted to the particular needs and requires no additional wiring for added modules. 0 or less, the area of the peak of PS43\u2212 component obtained by the waveform separation is 10 to 95% of the total area, and the area of P2S74\u2212 component obtained by the waveform separation is 5 to 45% of the total area, and the area of the peak of PS43\u2212 component is larger than the area of the peak of P2S74\u2212 component. The present invention includes modifications to prior-art devices to allow them to implement the new features of this invention. A group of transistors and piezoelectric components forming an accelerometer may be woven onto one or more natural or synthetic fibers.