Frequency Central System X CV Mixer Build Documentation

Frequency central

System X CV mixer

 Based on the Roland System 100M 132 module.

 4 inputs, 2 outputs – normal and inverted.

 +5V normalled to input 3, -5V normalled to input 4.

 Although named a CV mixer, it performs equally well as an audio mixer. If you

intend to use it primarily as an audio mixer, replace the pots with A100K.

Please observe the correct polarity for the dual opamp, 2 voltage regulators and 2

electrolytic capacitors. Don't mix up the 100R resistors with the 100K resistors!

100R x 2

1K x 2

22K x 1

47K x 1

100K x 7

All resistors ¼ watt

Build documentation for:

Rev(3) June 2015

Bill of materials

22pF x 2

10uF x 2

47uF x 2

TL072 x 1

78L05 x 1

79L05 x 1

B100K x 4

(9mm Alpha)

3.5mm Socket x 6

Power header x 1

Table of Contents

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Page 1 Frequency central Build documentation for: System X CV mixer Rev(3) June 2015  Based on the Roland System 100M 132 module.  4 inputs, 2 outputs – normal and inverted.  +5V normalled to input 3, -5V normalled to input 4.
Page 3 Assemble in this order:  Resistors  22pF capacitors  IC socket  78L05 and 79L05 (don’t mix them up!)  Power header  Electrolytic capacitors The pots and sockets need to be soldered to the ‘other side’ of the PCB, like this: ...