Microphone Mixer


Author Views Views Today Rank Comments
Anatoly I. Shikhatov 51,654 1 18
This relatively simple mixer was designed for three dynamic microphones, but can be re-designed for more or less. Level and tone controls are available to tailor the sound to your needs.

Schematic

Schematic for mixer

Parts

Part
Total Qty.
Description
Substitutions
R1, R2, R331K 1/4W Resistor
R4, R5, R6310K Logarithmic Pot
R711Meg 1/4W Resistor
R8, R10210K 1/4W Resistor
R9, R112100K Linear Pot
C1, C2, C5, C640.1uF Ceramic Disc Capacitor
C3, C4222nF Ceramic Disc Capacitor
U1, U22741 Op Amp
J1, J2, J33Input Jacks Of Your Choice
MISC1Board, Wire, Knobs, IC Sockets

Notes

  1. Email Anatoly I. Shikhatov with questions, comments, etc.
  2. R1-R3 are level controls. R9 and R11 control bass and treble, respectively.
  3. Since the circuit draws such low current, two 9V batteries can be used for a power supply.
  4. Building the mixer in a metal case will cut down on noise.

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Comments

anonymous
Microphone Mixer
Sunday, May 25, 2008 9:52:34 AM
usE TL072 op instead of 741
Bill
Microphone Mixer
Friday, April 11, 2008 10:26:33 PM
I can't find the two 22nf capacitors. can I substitute them with another value?
Scientist
Microphone Mixer
Wednesday, January 16, 2008 8:37:23 AM
nice guys. keep the good work on. I need more of audio electronics circuit
anonymous
Microphone Mixer
Sunday, January 06, 2008 10:22:38 PM
Can ur circuit supply 9V power. becoz i only need to use 1 capsule microphone and can i use other kind op amp like LM386
balu
Microphone Mixer
Friday, January 04, 2008 7:55:22 AM
I tried above ckt, but getting hum. How to reduce hum? can i use other better OPAMP instead of 741.
manoj
Microphone Mixer
Tuesday, December 18, 2007 3:58:46 AM
this is very good
osei
Microphone Mixer
Monday, November 19, 2007 10:09:58 AM
i want the one with four input (jake)
serene
Microphone Mixer
Friday, October 26, 2007 9:43:59 AM
can i get an explanation about jacks? can it be replaced with something else? i need the explanation & working of this circuit
pioneer
Microphone Mixer
Friday, August 10, 2007 5:13:55 AM
Can i connect output of mixer in input of preamp ( Tone Control ) ( the circuit i found on this page ) and after preamp in 22W amp ( the circuit i found on this page ) ? and can i do this mixer without preamp because i have preamp ( Tone Control )? Is necesary to do in 9 V? Can i put 12 or 15V?
Beckham
Microphone Mixer
Monday, July 09, 2007 1:59:33 PM
can the variable resistance also controlled by a microcontroller?
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