3 Channels Mini Mixer

Simple and cheap aduk-aduk circuit. This circuit supplied using 9V power supply. There is high/low-sensitivity switchable inputs for each input channel.

3 Channels Mini Mixer Circuit diagram :

Part List :

P1,P2,P3_________5K Linear Potentiometers

R1,R11,R15_____180K 1/4W Resistors

R2,R12,R16_______2M2 1/4W Resistors

R3,R13,R17_____750R 1/4W Resistors (See Notes)

R4,R14,R18_______1K 1/4W Resistors

R5______________15K 1/4W Resistor

R6_____________220R 1/4W Resistor

R7_______________1K5 1/4W Resistor

R8_____________820R 1/4W Resistor

R9_____________150R 1/4W Resistor

R10____________100K 1/4W Resistor

C1,C6,C8_________1?F 63V Polyester or Electrolytic Capacitors

C2,C4,C7,C9____100?F 25V Electrolytic Capacitors

C3,C5__________220?F 25V Electrolytic Capacitors

Q1,Q4,Q5______BC550C 45V 100mA Low noise High gain NPN Transistors

Q2____________BC547 45V 100mA General purpose NPN Transistor

Q3____________BC557 45V 100mA General purpose PNP Transistor

J1,J2,J3________3mm or 6mm Mono Jack sockets

SW1,2,tiga,4______SPST Toggle or Slider Switches

B1_______________9V PP3 Battery

Clip for PP3 Battery