交流电源改直流供电小拖拉机大部分是交流电源，它结构简单，安装方便。但是灯光亮度随发动机转速的高低而变化，给夜间行驶带来很大不搭。为较好地解决这个问颗．对介绍一种简便的改装方法，请读者一试。原小拖拉机发动机电源输出为三组电压，首先将其并联在一起。然后再... AC power to DC power supply Most tractors are small AC power supply, it is simple in structure and easy to install. However, the brightness of the light changes with the level of the engine speed, which brings great discomfort to the night driving. To solve this problem better. To introduce a simple modification method, please read the reader. The original small tractor engine power output for the three groups of voltage, first of all in parallel. after that...