WT8089 holiday lights ASIC

The holiday lantern controller circuit made with WT8089 integrated circuit is shown in Figure 2-99. VD1 ~ VD4 form a bridge
rectifier, which outputs a full-wave pulsating DC voltage
. One channel supplies power for the 4-channel lanterns. The other channel outputs about 4.7V DC voltage through Rl step-down, VD5 voltage stabilization and Cl filtering to power the integrated block A.
R2 is the external oscillation resistor of the integrated block. Increasing or decreasing its resistance can change the speed of the music playing speed. Changing
the capacitance of capacitor C2 connected to the melody signal generating pin can change the melody of the music. B is a piezoelectric ceramic piece, used to play electronic music
stored in the chip . SB is a function control button. Each time the button is pressed, a control mode is changed. Four modes can be cycled through, as shown in Table 2-48. In the first and second modes, the four-way colored lights H1, H2, H3, and H4 will produce 16 wonderful pattern jump cycles with the melody and beat of the 8 electronic music pieces emitted by the piezoelectric ceramic piece B. These jumps will The method is: turn right to race, turn left to race, light up one by one, turn off one by one, two lights moving in the water, two adjacent lights rolling, two lights chasing each other at intervals, four lights flashing at the same time, a single light shaking in sequence, a single light shaking in the opposite direction , double lights shift and flash, adjacent double lights shake and chase, double lights reverse shake and flash, spaced double lights shake and jump, spaced double lights reverse shake, four lights shake and flash at the same time. The 16 patterns are flexibly matched according to the melody and rhythm of the music to create the best visual effect, with sound and light flying together and being colorful.