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Commits (4)
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A set of modular PCBs that can be used to create a custom configuration for a Matrix Mixer. A Matrix mixer allows you to mix you any input to any output at the same time.
![](images/final.jpg)
If you have for example a 4x4 Matrix Mixer, you have 16 knobs with each controlling a how much of a given input signal (`1-4`) will be mixed into a given output (`A-D`):
![](images/4x4-matrix.png)
......@@ -42,9 +44,6 @@ Mixes two inputs onto two outputs using 4 Potentiometers.
| ---- | ----- | --- |
| <img src="gerbers/MAMI-QUAD_Combined_Top.png" width="200px"> | <img src="gerbers/MAMI-QUAD_Combined_Bottom.png" width="200px"> | <img src="images/3d-quad.png" width="200px"> |
The summing section looks like this and allows a jumper (`J_ATT1` and `J_ATT2`) or a switch (2.54mm lead spacing) to be used to switch between unipolar and bipolar attenuation for each row seperately.
![](images/schematic_summing.png)
## Output Module [MAMI-OUTPUT]
......@@ -54,6 +53,15 @@ Provides two 3.5mm Mono output jacks, with a Jumper (or switch) each row of tile
| ---- | ------ | --- |
| <img src="gerbers/MAMI-OUTPUT_Combined_Top.png" height="200px"> | <img src="gerbers/MAMI-OUTPUT_Combined_Bottom.png" height="200px"> | <img src="images/3d-output.png" height="200px"> |
The summing section looks like this and allows a jumper (`J_ATT1` and `J_ATT2`) or a switch (2.54mm lead spacing) to be used to switch between unipolar and bipolar attenuation for each row seperately.
![](images/schematic_summing.png)
### Erata Output Module rev. 1.0 (has been fixed in 1.1)
- Silkscreen for Vee and Vcc is swapped!
- `R4` and `R8` should have a value of 100 Ω not 100 kΩ (or bridge it with solder)
- Connector `J_W` was flipped by 180° (this however depends on which side you want your outputs). Solve it like this (just make sure the silkscreen labels connect to the right bus): ![](images/bus-wiring.jpg)
# Panels
Constructing a panel is straightforward: drill holes for all potentiometers, switches and jacks.
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......@@ -8,8 +8,12 @@
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gerbers/MAMI-OUTPUT_Combined_Top.png

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{
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images/3d-output.png

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images/schematic_summing.png

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