Delay bedside lamp circuit with hypnotic device

Circuit working principle: R1, C1. , door 1, VT, H constitute a timing lighting circuit .
Door 2 is an electronic switch. C2, R2, Door 3, Door 4, VD, Rp, R4, C3, HTD
constitute a timed hypnotic device, in which Door 3, Door 4, Rp, R4 and C3 are controlled
oscillators that imitate the sound of raindrops , which can be changed by adjusting the The speed at which raindrops sound. When in use, turn on
the power switch S3 and press the double buttons S1 and S2 to quickly discharge C1 and C2.