CD4541B delay light off circuit

The time-delay light-off circuit is composed of a new timing integrated circuit CD4541, and a small relay is used as a controller. When you need to turn on the light, press the light-on button, the light is turned on, and the timing control circuit enters the set timing state. When the preset timing time is reached, the light automatically turns off, and the working power of the timing control circuit is disconnected. The circuit composition is shown in the figure.