https://github.com/f33rni/cmcec
Cheap MIDI to CV Eurorack Converter
https://github.com/f33rni/cmcec
Last synced: 6 months ago
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Cheap MIDI to CV Eurorack Converter
- Host: GitHub
- URL: https://github.com/f33rni/cmcec
- Owner: F33RNI
- License: apache-2.0
- Created: 2022-09-10T15:45:47.000Z (about 3 years ago)
- Default Branch: master
- Last Pushed: 2022-09-24T09:12:07.000Z (about 3 years ago)
- Last Synced: 2025-02-15T12:52:24.279Z (8 months ago)
- Language: C++
- Size: 1.92 MB
- Stars: 1
- Watchers: 1
- Forks: 0
- Open Issues: 0
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Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# CMCEC
## Cheap 2 channel MIDI to CV converter on 2x12bit R2R DAC with supply voltage compensation, analog portamento and optical isolation
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### Schematic
PDF-version available at the root of the repo
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### R2R DAC
To make this project as cheap as possible I decided to use DIY R2R DAC based on 74HC595 shift registers instead of buying one
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### Calibration
CMCEC features automatic voltage compensation by measuring it internally. In order to use this feature as well as setup 1V/octave you need to perform calibration
1. Uncomment `//#define CALIBRATION 1` line and set it to the `#define CALIBRATION 0`
2. Connect Arduino to PC or UART at 9600. Follow the instructions
3. Uncomment `//#define CALIBRATION 1` line and set it to the `#define CALIBRATION 1`
4. Connect Arduino to PC or UART at 9600. Follow the instructions. Use Excel file in the root of the repo to simplify gain calibration
5. Comment `//#define CALIBRATION 1` line