FET Audio Mixing and Switching Circuit Diagram
Two or more signals can be switched and /or mixed without annoying clicks by using this fet audio mixer and switch circuit.
| PARTS LIST | |
| R1 | 1MΩ |
| R2 | 47kΩ |
| R3 | 47kΩ |
| R4 | 1MΩ |
| R5 | 47kΩ |
| R6 | 47kΩ |
| R7 | 47kΩ |
| VR1 | 50kΩ |
| VR2 | 50kΩ |
| C1, C2, C3 | 4.7µF 16V |
| C4 | 100nF (104) |
| C5 | 47nF (473) |
| C6 | 47nF (473) |
| Q1 | BF245 or 2N3819 |
| Q2 | BF245 or 2N3819 |
| S1, S2 | Switch |
Junction-FETs such as the BF245 or 2N3819 already popular in HF circuits but it can also applied to LF circuits.
BF245
You can mute these signals using S1 and S2. The circuit should mute sufficiently any audio from 20 Hz to 20 kHz.
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this post is very usefull thx!
hello can u plz tell how i drop -9 volt using 9v bettry???
and what type of speaker i can use as output?
Thanks a lot man, by the way. Could you tell me please about input and output? What it is? Microphone Input and Speaker Output i’m right?