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.
 |
 |
Please send your ideas, which are very important for our success…
#1 by physical therapist on October 12th, 2010
this post is very usefull thx!