SH-804 Holiday Lights ASIC

The circuit of the holiday lantern controller made with SH-804 is shown in Figure 2-63 (some new products SH-804 have the
same pin arrangement as SH-803. For the circuit in this case, please refer to the circuit of SH-803, which is Figure 2- 58, but the parameters of the circuit components should
be selected according to Figure 2-63).
    The 220V AC power is bridge-rectified by VDI~VD4, and one channel supplies power to the light strings H1~H4. The other channel is stepped down by R3,
stabilized by VD5, and filtered by CI to supply power to the integrated block A. Rl provides synchronization signals for the integrated block. The LI-IA terminal of the integrated block
the thyristor V51-VS4, so that the colored lights H1-H4 flash according to the program stored in the chip. Press SB to select the flashing pattern.