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Std EditionAudio Switch on CD4066
Description
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.
Documents
| 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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