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paper_bits:pb702_midi_synth [2020/03/20 17:51] admin [Software] |
paper_bits:pb702_midi_synth [2020/06/11 22:13] |
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| - | ===== PB702 MIDI Synthesizer ===== | ||
| - | The MIDI Synthesizer gives the possibility to connect your Paper Bits to a Midi Keyboard like the[[sound_boards:midi_keyboard|MIDI Keyboard]]. It is polyphonic up to six notes and has three different waveforms: square, triangle and sine.\\ | ||
| - | It's basically an Arduino clone running a small program based on the wonderful [[http://sensorium.github.io/Mozzi/|Mozzi]] library.\\ | ||
| - | |||
| - | For burning the bootloader look here:\\ | ||
| - | [[avr_bootloader:avr_bootloader_main|AVR & Bootloader]]\\ | ||
| - | For uploading the program one needs an USB to Serial adapter or an Arduino:\\ | ||
| - | [[arduino_clones:serial_adapter|The Arduino as a Serial Adapter]]\\ | ||
| - | |||
| - | ---- | ||
| - | ====Paper PCB==== | ||
| - | {{:paper_bits:pb702_midi_synth_22.jpg?400|}}\\ | ||
| - | {{ :paper_bits:pb702_midi_synth_22.zip |}} | ||
| - | |||
| - | ---- | ||
| - | ==== Parts ==== | ||
| - | * **Resistors:** | ||
| - | * 1x 220 Ohm | ||
| - | * 1x 330 Ohm | ||
| - | * 2x 470 Ohm | ||
| - | * 2x 1 KOhm | ||
| - | * 2x 1.2 KOhm | ||
| - | * 1x 2 KOhm | ||
| - | * 1x 3.3 KOhm | ||
| - | * 1x 3.9 KOhm | ||
| - | * 2x 8.2 KOhm | ||
| - | * 1x 10 KOhm | ||
| - | * 2x 47 KOhm | ||
| - | * 1x 100 KOhm | ||
| - | * 1x 220 KOhm | ||
| - | * 1x 1 MOhm | ||
| - | * **Capacitors:** | ||
| - | * 2x 22 pF | ||
| - | * 2x 1 nF | ||
| - | * 1x 4.7 nF | ||
| - | * 3x 100 nF | ||
| - | * 1x 150 nF | ||
| - | * **Electrolytic Capacitors:** | ||
| - | * 1x 1 µF | ||
| - | * 2x 10 µF | ||
| - | * **Semiconductors**: | ||
| - | * Atmega 328P-PU | ||
| - | * OpAmp MCP 6002 | ||
| - | * Optocoupler 6N138 | ||
| - | * **Cristal** | ||
| - | * 1x 16 MHz | ||
| - | * **Diodes** | ||
| - | * 1x 1N4148 | ||
| - | * 1x LED | ||
| - | * **Mechanical:** | ||
| - | * 1x IC socket, 28 pin | ||
| - | * 2x IC socket, 8 pin | ||
| - | * 1x pin strip 1x14pin | ||
| - | * 2x pin header, female 90° 1x3, 1x2 | ||
| - | * 2x pin header, male 90° 1x3, 1x2 | ||
| - | * 2x push button | ||
| - | * 3x jumpers | ||
| - | |||
| - | ---- | ||
| - | ==== Software ==== | ||
| - | |||
| - | The synthesizer program is based on the [[https://sensorium.github.io/Mozzi/|Mozzi Library]], have a look at the [[https://sensorium.github.io/Mozzi/doc/html/index.html|Mozzi Dokumentation]] to learn more about it.\\ | ||
| - | For the installation download the [[https://sensorium.github.io/Mozzi/download/|library]]\\ | ||
| - | and install it like described here: [[https://www.arduino.cc/en/Guide/Libraries#toc4]]\\ | ||
| - | |||
| - | Unfortunately there is nowadays a glitch in the Mozzi library. Arduino change the compiler. Now the uploaded code is smaller but a timing problem appeared, too. Here is an description about the problem. | ||
| - | [[https://www.instructables.com/id/Arduino-IDE-16x-compiler-optimisations-faster-code/]]\\ | ||
| - | |||
| - | To fix the glitch follow these steps:\\ | ||
| - | In: arduino-x.x.x\hardware\arduino\avr\platform.txt change **-O2** to **-Os.**\\ | ||
| - | [[https://sensorium.github.io/Mozzi/fixes/updates/howto-for-arduino-1-dot-6-11/]]\\ | ||
| - | \\ | ||
| - | |||
| - | Upload that code to your board (Arduino UNO):\\ | ||
| - | {{ :paper_bits:mozzi_midi_poli_12_1sec_limit.zip |}}\\ | ||
| - | {{ :paper_bits:mozzi_midi_poli_10.7z |}}\\ | ||
| - | |||
| - | ---- | ||