Kosmo
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Kosmo, a modular synthesizer format developed by Look Mum No Computer for his live music performances, has gained popularity among DIY modular synth enthusiasts.
Specifications
The format is electrically compatible with the Eurorack format; however, the panels are 20cm high, widths are in multiples of 2.5cm, and audio and CV are patched with 1/4 inch jacks.[1][2]
Electrical
- Power supply
- + and - 12V
- Eurorack compatible 10-pin IDC shrouded header on PCB. Pin 1 with -12V towards the bottom off the module recommended.
- Control voltages (CV)
- -10V to +10V typical
- 0V to +10V for envelopes
- 0V to -10V for inverted envelopes
- 1V/oct for pitch/frequency control.
- Input impedance: 100k typical
- Output impedance: 1k typical
- Audio signals
- -5V to +5V typical
- -10V to +10V max
- Input impedance: 100k typical
- Output impedance: 1k typical
- Gate signals
- Off: 0V
- On: minimum 4V, typical 5V?, maximum ...
Case
- Wooden mounting rails
- Widths: 12.5mm per rail maximum and about 6mm minimum
Aluminium front panel
- Aluminium
- 1.5mm aluminium[3]
- 0.063 inch 6061 aluminum has a good balance of cost, strength, and machinability.[4]
- Height: 20cm ("metric 5U")
- Width: Multiple of 2.5 cm
- Allow 10mm top and bottom for the mounting rails.[5]
- Mounting holes
- Distance from top to center: 3mm
- Distance from sides to center: 3mm. This reflects recent LMNC practice. The 1112 Performance Filter used different distances. Sam has said he may use slotted mounting holes in future modules.)
- Mounting screws: M3[6]
See also
References
- ^ Inside the crazy, musical mind of Look Mum No Computer, Engadget
- ^ Kosmo Format: Look Mum No Computer releases the Funky Filter Grr and Offset Boost Attenuvert by Robin Vincent, Gearnews 2 Nov 2020
- ^ 6 - Big jacks little jacks cardboard box by Sam Battle, 12 Jun 2017
- ^ Aluminum thickness for front panels, Synthdiy, Reddit, Sep 2021
- ^ Building your own modular synth, Look Mum No Computer
- ^ Kosmo Specification, Look Mum No Computer FAQ, Jun 2023
External links
- Look Mum No Computer, YouTube
- Look Mum No Computer website
- Look Mum No Computer, Discourse group
- Richard Holmes, GitLab - Kosmo modules and panels, KiCad templates for Kosmo panels and KiCad footprint library for Kosmo panel elements
Power supply
- Power suplly PCBs, Frequency Central
- Frequency Central Microbus (Power Supply) BOM, LMNC Discourse group
- PSU startup problem and how to fix it, Rich Holmes blog
Kosmo modules
- List of LMNC modules and synth projects, LMNC Discourse group
- Kosmo Modules Wiki
- Kosmodular Grid
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