It is suggested to use a special optocoupler trigger circuit to trigger SCR circuit. The designed circuit has simple structure and reliable trigger. If ordinary optocoupler is used to design SCR trigger circuit, the circuit design is more complicated, and the determination of circuit parameters is also more complicated, so the reliability can not be well guaranteed. If the latter method must be adopted, you can refer to the design ideas in the following links: /link? URL = itac F8 goik 9 vwxmmi 18sT _ T-VW 1 RBV 3 pdmz 2 _ _ 0 qti 5 te _ qrdx 235 pxdbnqy 1 vlx 1s _ lvbsavl 27 ytx 8 vqjebbv 4 lain pnt 9 kfsyjztu 3 bi