SH-803R holiday lights ASIC
Source: InternetPublisher:司马缸砸光 Keywords: Application specific integrated circuit lantern Updated: 2021/12/16
The holiday lantern controller circuit made with SH-803R is shown in Figure 2-60. The 220V alternating current is rectified by VD1-VD4 bridge type
. One channel supplies power for the four lanterns H1~H4. The other channel is stepped down by R2, stabilized by VD5 and filtered by Cl to supply
power to the integrated block A. Rl provides AC synchronization signal for the integrated block Pins 12~15 of the chip directly drive the thyristors VSI~VS4, making the light strings
H1-H4 flicker according to the program stored in the chip . S is the flashing mode selection switch. Turn S to select the required
flashing segment at K1^K8.
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