一般轿车内均装有门控照明灯,车门开,灯就亮:车门关,灯便熄,可就在这关车门后的几秒内,车内有人时很需要照明,以便驾驶员插入点火钥匙或打开其他照明灯。这里介绍的门灯延迟开关,就是为此而设计的,经实际使用效果良好。1.电路原理汽车门灯延迟开关的电路如图1虚线框内所示, General car are equipped with gated lights, the door open, light on: the door closed, the light will be extinguished, but in this few seconds after the door closed, when the car is in need of lighting, so that the driver into the ignition Key or turn on other lights. The door lamp delay switch described here is designed for this purpose, and the actual use of good results. 1. Circuit Principle Car door delay switch circuit shown in dashed box in Figure 1,