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    Four Enter Sound Source Auto Selector ----- Audio Source Selector

     

    Four Enter Source Auto Selectors, Audio Source Selector Keywords: Sound source switch, source selector, CD4066, CD4017, KA2281 This circuit is used for the multi-input selection of amplifiers. It can pick up 4 stereo source and select it all the way as an output. When the power is turned on, the default is selected is A road. If the A road is mute, it will automatically jump to B Lu Yingyuan, if B is also mute, automatically jumps to C, according to this class, to the channel selected to have music output. The delay time of the skip select can be changed by C1. The delay time of the C1 is growing. The selection of the source can be done by S1, and S1 is a tap switch, and the source is selected as follows. The result of the selection can be observed by the LED indicator. 4 LEDs are set in the circuit, and the source of knowledge selection is used. The integrated circuit CD4066 is a 4-way independent analog switch with 2 sheets as a four-way stereo, which is controlled by CD4017, and the CD4017 is a 10-encycloped counter, and now set to a 4-binding counter. The clock end of the CD4017 has a control of a 555 multi-resmium, and the multi-resmier output is once, and the output of the CD4017 is hop once, thereby completing the selection of the sound source. The triode T1 is controlled to the 555 oscillator. If the triode is turned on, 555 oscillate stops. When the sound source selector is selected from the sound source, the T1 is turned on, the 555 oscillator stops oscillation, and the CD4017 output is locked, and the additional sound source cannot be automatically selected, unless to manually press S1. T1 can be adjusted to adjust the VR1. KA2281 is the volume size indicator, which requires appropriate adjustment of VR3 and VR2, and the volume indicates the correct indication when there is no music output.

     

     

     

     

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