SH-841 Holiday Lights ASIC
Source: InternetPublisher:JFET Keywords: Application specific integrated circuits lanterns transistors Updated: 2020/10/25
Figure 2-78 is a holiday light controller made with SH-841 as the core device .
The light strings H1~H4 are driven by the thyristors VSl~VS4 to flash. The working voltage of the integrated block is obtained through the AC power through VD1-VD4 bridge rectification, Rl step-down, VD5
voltage stabilization and C2 filtering. The music signal output by pin 2 of the integrated block the transistor VT to drive the piezoelectric ceramic piece B to produce
sound. Adjusting the potentiometer RP can control the sound volume.
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