SC3071 touch step dimming light circuit

When using the touch-type step-by-step table lamp made of SC3071 integrated circuit , it only needs to
be touched repeatedly by human hands. f. The brightness of the
light will cycle through four levels: weak light,
medium light, brightest, and off. At the maximum brightness, the VTH conduction angle of the thyristor is 115. . SC.307l is a four-speed touch ratio dedicated integrated circuit developed by     Hangzhou Silan Microelectronics Co., Ltd. (http: ij WWW. silan com cn-'). It is manufactured using CM()S technology and has standard DIr 8 sealing , the functions of each pin are: ① pin (H. is the oscillation terminal connected to an external oscillation resistor; 00 pin Z[', is the AC signal step input terminal; ③ pin V.., the positive terminal of the power supply; ④ pin SI, is Touch signal input terminal; ⑤ pin V1. is the voltage control terminal; ⑥ pin N (,, pin; ⑦ pin V., the negative terminal of lU source; ⑧ pin TIRI, pulse output terminal, triggers the thyristor VTH. S(;3071 makes the voltage range of Sichuan Electric/IP.ILI S-10V, and the typical value is uv.