Microphone Mixer

Author	Views	Views Today	Rank	Comments
Anatoly I. Shikhatov	104,915	66		22

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

Parts

Part	Total Qty.	Description	Substitutions
R1, R2, R3	3	1K 1/4W Resistor
R4, R5, R6	3	10K Logarithmic Pot
R7	1	1Meg 1/4W Resistor
R8, R10	2	10K 1/4W Resistor
R9, R11	2	100K Linear Pot
C1, C2, C5, C6	4	0.1uF Ceramic Disc Capacitor
C3, C4	2	22nF Ceramic Disc Capacitor
U1, U2	2	741 Op Amp
J1, J2, J3	3	Input Jacks Of Your Choice
MISC	1	Board, Wire, Knobs, IC Sockets

Notes

Email Anatoly I. Shikhatov with questions, comments, etc.

R1-R3 are level controls. R9 and R11 control bass and treble, respectively.

Since the circuit draws such low current, two 9V batteries can be used for a power supply.

Building the mixer in a metal case will cut down on noise.

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Comments

Add A Comment

Feil Microphone Mixer Monday, April 19, 2010 10:08:37 PM

this circuit is nice, but do TL0712 works like the 741 OP AMP? what are the characteristics of TL072?

anonymous Microphone Mixer Friday, February 12, 2010 1:41:24 PM

When you say 2 9v batteries, do you mean in series or in parallel? Does that mean the circuit needs 18'v?

bikash Microphone Mixer Tuesday, August 25, 2009 4:30:40 AM

ok this is nice and these are helpng me to know aboutr electroncs so a heartiest thanks to u.

shoaib Microphone Mixer Monday, January 26, 2009 2:33:17 AM

i complete circuit & cheak out many time but my circuit not work i use the max1044 ic for 9v+ 9v- supply what i do help any one plz

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

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Feil	Microphone Mixer	Monday, April 19, 2010 10:08:37 PM
this circuit is nice, but do TL0712 works like the 741 OP AMP? what are the characteristics of TL072?
anonymous	Microphone Mixer	Friday, February 12, 2010 1:41:24 PM
When you say 2 9v batteries, do you mean in series or in parallel? Does that mean the circuit needs 18'v?
bikash	Microphone Mixer	Tuesday, August 25, 2009 4:30:40 AM
ok this is nice and these are helpng me to know aboutr electroncs so a heartiest thanks to u.
shoaib	Microphone Mixer	Monday, January 26, 2009 2:33:17 AM
i complete circuit & cheak out many time but my circuit not work i use the max1044 ic for 9v+ 9v- supply what i do help any one plz
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