为提高拖拉机驾驶模拟器系统的真实性和互动性，采用双极性555芯片设计拖拉机驾驶模拟器的转向灯电路。详细说明双极性555芯片非稳态工作模式的设定方法及原理，介绍拖拉机模拟器转向灯电路的连接方法。仿真结果表明，输出波形为方波信号，闪烁频率为84次／min，能够满足设计要求。%In order to improve authenticity and interactive of tractor driving simulator system, it mainly adopts double polarity 555 chip design for tractor driving simulator of turn signal circuit. It specified bipolar 555 chip unsteady work mode setting method and principle, and introduced connection method for tractor simulator turn signal circuit. The result showed that output waveform is square wave sig-nals, flicker frequency is 84 times/min, can meet the design requirements.
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