LCl82 audio voltage control neon light pattern control circuit

Published:2011/5/10 7:41:00 Author:Nicole | Keyword: audio voltage control, neon light pattern | From:SeekIC

The control circuit is as shown. It consists of pickup sensor, sound control integrated circuit IC1, LC182 light control circuit, AC solid state relay and neon light drive circuit, AC depressurization rectifier circuit. Sensor BM is CRZ2 electret condenser microphone, it will transform the piched up sound singal into electrical signal. IC2 adopts special sound control integrated circuit BH-SK-II. Its chip contains three-level amplifier, shaper, frequency selection network, bistable trigger and drive circuit. The singal from sensor BM is added to input terminal 1 foot of SK-Ⅱsecond level amplifier through C1, after enlarged, it is outputed by 2 foot, and coupled to the input terminal 3 foot of SK-Ⅱthird level amplifier, it is enlarged and shaped again, it is fliped by triggering bistable state. SK-Ⅱhas two drive output terminals of 6 foot, 9 foot, it only uses output current terminal 9 foot as output. Outputed by SK-Ⅱ, The pulse singal is added to LC182 audio frequency singal input terminal UIN through C6. The sound(such as hand-clapping, beating) singal and the flipping of SK-Ⅱbistable state circuit is controlled by sensor BM, then to control the voltage control oscillator frequency inside SK-Ⅱ, it can realize voltage control to the cycle flashing frequency of color lamp.



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