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DIY Hobby projects, diagram, schematic

Electronic Circuits

DIY Hobby projects, diagram, schematic

FET Audio Mixer and Switch Circuit Diagram

electronicecircuits, October 5, 2010August 15, 2023
FET Audio Mixer and Switch Circuit

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.

FET Audio Mixer and Switch Circuit Diagram

PARTS LIST
R11MΩ
R247kΩ
R347kΩ
R41MΩ
R547kΩ
R647kΩ
R747kΩ
VR150kΩ
VR250kΩ
C1, C2, C34.7µF 16V
C4100nF  (104)
C547nF (473)
C647nF (473)
Q1BF245 or 2N3819
Q2BF245 or 2N3819
S1, S2Switch

Junction-FETs such as the BF245 or 2N3819 already popular in HF circuits but it can also applied to LF circuits.

BF245 FET
BF245

You can mute these signals using S1 and S2. The circuit should mute sufficiently any audio from 20 Hz to 20 kHz.

FET Audio Mixer and Switch CircuitFET Audio mixing and switching Circuit

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Comments (2)

  1. physical therapist says:
    October 12, 2010 at 7:13 pm

    this post is very usefull thx!

    Reply
  2. tahir says:
    May 18, 2015 at 7:04 pm

    hello can u plz tell how i drop -9 volt using 9v bettry???
    and what type of speaker i can use as output?

    Reply

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