黑暗时,即使关上汽车车门,车厢内照明如能持续一定时间的话,无论是操作点火键还是系安全带都十分方便。一般经验认为断开延迟时间最少需要8秒,然而一旦越过15秒就会妨碍汽车起动。这里介绍的是利用功率MOS场效应晶体管制作的断开延迟电路。其特点如下: Dark, even if the closed car doors, interior lighting, such as can last a certain period of time, whether it is operating the ignition key or seat belt are very convenient. It is a general rule of thumb that it takes at least 8 seconds to turn off the delay, however, a 15-second delay can prevent the car from starting. Described here is the use of power MOSFET transistors produced off delay circuit. Its characteristics are as follows: