Practical voice-controlled music lantern (1)
Source: InternetPublisher:三月小雨 Keywords: Voice control music lanterns audio amplifiers thyristors Updated: 2021/12/02
Resistor R1, diode VDI and capacitor CI form a simple resistor step-down half-wave rectifier circuit, which outputs about ten volts of DC
voltage for powering control circuits such as audio amplifiers . Piezoelectric ceramic piece B serves as the sound source. Electrical sensor, which picks up
the sound wave signals of the surrounding environment and converts them into corresponding electrical signals. VTI and VT2 act as audio amplifiers
.
After amplifying the weak electrical signals
picked up by
Therefore, the thyristor VS can be turned on or off according to the strength of the environmental sound wave signal, so the colorful light string
H can sparkle with the rhythm of the music. Adjusting the potentiometer RP can adjust the level of voice control sensitivity.
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