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Control board schematics and PCB for my polyphonic synthesizer

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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

Polykit X8 Main Board Rendering

Related repositories:

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

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Control board schematics and PCB for my polyphonic synthesizer

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