FIG VDI, VD2, Rl and Cl form resistance voltage half-wave rectifier circuit, the output DC voltage 5v supply manifold with electricity. R2 for the manifold provides AC zero-cro
ssing signal. R5 is manifold external oscillator resistor. R6 and C3 to ensure the integration task to achieve clear reset each power block. SB1 ~ SB4 are the stepless dimming, four stepper dimming, off delay and automatic cycle switch light touch of a button, readers can choose one or four keys are used according to their needs any.