12hp Eurorack Macro Oscillator
Difficulty level: Beginner
Time: 1-2 hours
What you'll need
Immutable Plaits DIY kit
Soldering Iron
Solder
Side cutters
Verify parts
Begin by pulling out all of the parts included in your Plaits DIY kit and reference the bill of materials to ensure you're not missing anything.
The processor is pre-flashed with the latest/last firmware (V1.2), including the new synthesis modes.
Placing and soldering components
Begin by placing the 10-pin header and the DC-DC converter on the backside of the PCB in the orientation shown below.
The RECOM DC-DC Converter needs to go on the backside, since it is a bit too tall to fit on the top side. Ensure it is soldered the correct way around - the "R-78E3.3-0.5" text should be facing inside the board.
Start by soldering a single pin of each component and then checking alignment and orientation. If necessary apply heat to the joint you just soldered and adjust until the components are straight and flush.
Finish soldering the rest of the pins.
The rest of the components will be placed on the front of the board.
Place all ten jacks and Solder them in from the backside.
Slide the LED standoffs onto the legs of LED's.
Place LEDS so the flat edge of the LED lines up with the flat edge that is printed on the PCB for each LED.
Solder a single pin of each LED to the PCB board.
Apply a slight amount of pressure to the LED and heat the solder joint you just made, slide the LED until the holder is completely flush with the board and the LED is standing straight up. Repeat for each LED and solder the remaining pins.
Alignment can be confirmed by placing the front panel on the board and ensuring the LED's land in their holes and are all the same height.
Place the switches at the top of the board and solder them in from the back. The switches have no polarity, and only fit in 2 of 4 posible orientations.
Place the three tall trimmer potentiometers with the plastic shafts in the lower placeholders just above the jacks.
Place the other four potentiometers in the remaining spots on the board and solder all pots from the back of the board. Be sure to apply a generous amount of solder to the large metal tabs as they are used to mechanically secure the pot to the board.
Lastly secure the panel to the board with the nuts for the jacks and the potentiometers and place the knobs on the potentiometer shafts.
Test and Calibration
Disconnect all CV inputs.
Connect the note CV output of a well-calibrated keyboard interface or MIDI-CV converter to the V/OCT input. Leave all the other CV inputs unpatched.
Press both buttons (A). The first LED slowly blinks in green.
Send a voltage of 1.000V to the V/OCT input.
Press any button. The first LED now blinks in orange.
Send a voltage of 3.000V to the V/OCT input.
Press any button.
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