diff --git a/README.md b/README.md index ae7ee1063ff1964a1128faae2e6ff29ee2899d5f..a5a62b7492fff8f549ab20ca9b96059333c9e23b 100644 --- a/README.md +++ b/README.md @@ -2,15 +2,15 @@ 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. - +<img src="images/final.jpg" height="600px" width="auto"> 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`): - +<img src="images/4x4-matrix.png" height="600px" width="auto"> For example by turning up the knob at the intersection between Input `2` and Output `B` we can mix all of the signal present at the input to the output. If we turn up another knob at another intersection, the signal will be present at both outputs: - +<img src="images/matrix-examples.png" height="600px" width="auto"> This makes Matrix mixers extremely flexible and allows for many possible combinations and use cases. @@ -54,13 +54,13 @@ 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. - +<img src="images/schematic_summing.png" height="600px" width="auto"> ### 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):  +- 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): <img src="images/bus-wiring.jpg" height="600px" width="auto"> # Panels @@ -73,4 +73,4 @@ Use the python code in [calculate-parts.ipynb](https://code.hfbk.net/sdiy/mami/b # Power-Supply -The MAMI needs a fitting ±12V Power supply. This obviously depends on the size you are going for. Anything up to 10x10 should be able to be powered by the [3WPSU](https://code.hfbk.net/sdiy/3wpsu) with a USB-B Phone Charger as one output module should use about 10mA (to be verified) and the 3WPSU is able to deliver up to 125mA per rail. \ No newline at end of file +The MAMI needs a fitting ±12V Power supply. This obviously depends on the size you are going for and which opamp you use – one Output-Module with 2 channels and a LME49720 draws ~20mA. Anything up to 10x10 should be able to be powered by the [3WPSU](https://code.hfbk.net/sdiy/3wpsu) with a USB-B Phone Charger, as the 3WPSU is able to deliver up to 125mA per rail.