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Polykit X8 Controlboard
THIS IS NOT A FINISHED PRODUCT IN ANY WAY AND STILL UNDER HEAVY DEVELOPMENT - USE AT YOUR OWN RISK!
This repository contains Kicad schematics and PCB layout of a control board for a polyphonic synthesizer.
There is a video playlist on the design process https://makertube.net/w/p/3N2fRjXwT2SfAUv2VkMy3e
Related repositories:
- Voice Card: https://github.com/polykit/polykit-x-voice-card
- Main Board: https://github.com/polykit/polykit-x-mainboard
- Input Board: soon
- Software: soon
- Power Supply: https://github.com/polykit/eurorack-psu
BOM
| Reference | Value | Footprint | Comment | Qty |
|---|---|---|---|---|
| C1, C2 | 100n | Capacitor_SMD:C_1206_3216Metric | 2 | |
| D1-D4 | 1N4148WS | Diode_SMD:D_SOD-323 | 4 | |
| J1 | MCU_BOARD | Connector_PinHeader_2.54mm:PinHeader_1x16_P2.54mm_Vertical | optional, when used as MIDI controller | 1 |
| J2 | X8_I2C_POWER | Connector_IDC:IDC-Header_2x05_P2.54mm_Vertical | 1 | |
| J3 | X8_EXT_DIGITAL | Connector_IDC:IDC-Header_2x05_P2.54mm_Vertical | 1 | |
| J4 | DISPLAY | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | 1 | |
| R1-R34 | 10k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | 34 | |
| SW1-SW6 | SW_Push | Button_Switch_THT:SW_PUSH_6mm_H13mm | 6 | |
| SW7-SW22 | RotaryEncoder | Rotary_Encoder:RotaryEncoder_Bourns_Vertical_PEC12R-3xxxF-Nxxxx | without switch | 16 |
| U1, U2 | MCP23017_SO | Package_SO:SOIC-28W_7.5x17.9mm_P1.27mm | 2 |
References
https://www.ti.com/lit/an/slva704/slva704.pdf
https://github.com/horfee/kicad-packages3D/tree/master/Rotary_Encoder.3dshapes