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Std EditionAudio Switch on CD4066


Published Time:2019-04-04 15:52:00
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A stereo A/B switch using one chip and a few parts. Note that all values are not critical but typical. They can vary greatly with little effect on performance. Just impedance and audio levels. With this circuit you could eliminate the 10k input resistors. They were originally put there to create an input match. If you have an extra output pin from the PIC and want the option of turning both channels off or on at the same time, you can eliminate the inverter transistor, two associated 10k resistors, and drive the control pins (5,13 and 6,12) separately. A "1" on the port out pin will turn the switches on. A "0" will turn everything off.


Audio Switch on CD4066 (SHEET)

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Audio Switch on CD4066 (PCB)

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ID Name Designator Footprint Quantity
1 1u C1,C2,C5,C6,C8 RAD-0.1 5
2 4.7u C3,C4 RAD-0.1 2
3 10u C9,C10 CAP-D3.0XF1.5 2
4 inA_GND INA_GND HDR-1X1/2.54 1
5 inA_L INA_L HDR-1X1/2.54 1
6 inA_R INA_R HDR-1X1/2.54 1
7 inB_GND INB_GND HDR-1X1/2.54 1
8 inB_L INB_L HDR-1X1/2.54 1
9 inB_R INB_R HDR-1X1/2.54 1
10 out_GND OUT_GND HDR-1X1/2.54 1
11 out_L OUT_L HDR-1X1/2.54 1
12 out_R OUT_R HDR-1X1/2.54 1
13 ctrl1 P8 HDR-1X1/2.54 1
14 ctrl2 P9 HDR-1X1/2.54 1
15 4.7k R1,R2 AXIAL-0.3 2
16 100k R3,R4,R5,R6,R7,R8 AXIAL-0.3 6
17 CD4066BE U2 DIP14 1
18 VCC VCC HDR-1X1/2.54 1


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