HY8010, HY8020 circuit working principle of the typical circuit diagram

Published:2014/1/2 20:06:00 Author: | Keyword: HY8010, HY8020 circuit working principle of the typical circuit diagram, | From:SeekIC

Figure a HY8010, HY8020 circuit principle diagram, typical circuit external triode drive a speaker work, within 50 mw output power. Choose the models such as beta of 150 or 150 small power triode. SP choose 8 Ω impedance, 1/4 w speakers. Figure of Rosc for external vibration resistance, external resistance adjusting the sampling frequency. HY8010 Rosc resistance value between Ω Ω 90 k to 90 k, HY8020 and HY8040 Rosc resistance value between 470 k Ω ~ 2 m Ω selected. Change resistance value can change the playback speed, make its meet the normal requirements. Figure b direct drive piezoelectric buzzer circuit (piezoelectric buzzer resonance frequency of 1 KHZ). Mainly used in electronic mail, voice greeting CARDS and other small products.



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