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本人利用发光二极管自制了一个挡位显示器,所用零件成本低、安装简单,经使用效果良好,有兴趣者不妨一试。电路原理如图所示,D_1～D_5为发光二极管,D_1显示空挡,发蓝光,D_2～D_5显示1～4挡,发红光。R_1～R_5为小型碳膜电阻,阻值在150～200欧姆之间。D_6～D_8为整流二极管,型号为ZCP11。当打开点火开关,挡位处于空挡时,D_1导通发光;当处于1挡时,D_2导通发光;当处于2挡时,D_3导通发光,同时由于
I made use of light-emitting diodes made a gear display, the parts used in low-cost, easy to install, the use of good results, those who are interested may wish to give it a try. As shown in the circuit principle, D_1 ~ D_5 for the light-emitting diode, D_1 display neutral, blue, D_2 ~ D_5 display 1 ~ 4 block, red. R_1 ~ R_5 are small carbon film resistors with a resistance of 150 ~ 200 ohms. D_6 ~ D_8 are rectifier diodes, model ZCP11. When the ignition switch is turned on, gear is in neutral, D_1 conduction light; when in the first gear, D_2 conduction light; when in the second gear, D_3 conduction light, and due to