Project · Boosters & Volume
Micro Mixer
This is a simple two-channel mixer by Forrest M. Mimms III from his book: Engineer's Mini-Notebook Basic Semiconductor Circuits. This project delivers the goods for a simple mixer that sounds great with guitar signals. Note that this is built on our CB1 PCB. The CB1 PCB is a multi-use PCB so there are several projects that can be built on it.
Project files
Everything you need to build it
Micro Mixer Ready-For-Transfer Printed Circuit Board Layout - For use only if you are a complete DIY person who wants to etch and drill your own PCB. Otherwise, we recommend you ignore this PCB mask and buy the Ready to Solder Printed Circuit Board.
Parts layout
Parts Layout / Wiring Diagram
What you will need
Bill of Materials
Version 2014July02 · Copyright 2014 JD Sleep · Permission refused for posting/serving this file from any site other than www.generalguitargadgets.com · Trademarks are property of their owners
Resistors
| Resistor ID | Value | 3-band Marking | 4-band Marking |
|---|---|---|---|
| R3 | 470 ohm | yellow-violet-brown | yellow-violet-black-black |
| R4 | 100 ohm | brown-black-brown | brown-black-black-black |
| R5a | (Potentiometer) | ||
| R5b | (Potentiometer) | ||
| R7 | 1k | brown-black-red | brown-black-black-brown |
| R9a | 100k | brown-black-yellow | brown-black-black-orange |
| R9b | 100k | brown-black-yellow | brown-black-black-orange |
Capacitors
| Capacitor ID | Value | Type | Possible Marking |
|---|---|---|---|
| C1a | 1µF | Film or Aluminum Electrolytic | 105 or 1µF |
| C1b | 1µF | Film or Aluminum Electrolytic | 105 or 1µF |
| C2 | 1µF | Film or Aluminum Electrolytic | 105 or 1µF |
| C3 | 47µF | Aluminum Electrolytic | 47µF |
| C4 | 100µF | Aluminum Electrolytic | 100µF |
Potentiometers
| Part ID | Value | Type |
|---|---|---|
| R5a - Volume Control (Channel 1) | 1M | Linear Taper |
| R5b - Volume Control(Channel 2) | 1M | Linear Taper |
Other
| Part ID | Part Name |
|---|---|
| D2 | LED |
| Q1 | MPF102 JFET Transistor |
| J1 | Stereo quarter-inch jack |
| J2 | Mono quarter-inch jack |
| J3 | DC Jack |
| J4 | Mono quarter-inch jack |
| B1 | 9 volt battery (not included in the Kit) 9v battery snap, Printed Circuit Board, 24 gauge stranded wire, Enclosure, Knobs |
How to build it
Instructions
Version 2014July03 · Copyright 2014 JD Sleep · Permission refused for posting/serving this file from any site other than www.generalguitargadgets.com · Trademarks are property of their owners
This is a very simple 2-channel mixer and it sounds great. A great tool to have in your home studio or on your pedal board for parallel effect chains. This is a fairly simple kit to build. Follow the Bill of Materials, the Layout Diagram and General Build Instructions. You can any kind of 1uF capacitors, but if you use Tant or Aluminum Electrolytic, pay attention to the polarity. If it's a film 1uF there is no polarity, it doesn't matter. You will have to do some solder tacking for the input caps and resistors as shown on the diagram.
Comments and questions are welcome and can be sent to [email protected]
More about this project
Notes, sounds and related links
Ready to build? We have the kit.
Would you like a Ready to Solder Circuit Board for this project?