Polykit X8 Input Board
About the Polykit X8 Input Board
Polykit X8 Input Board is an open source PCB design by polykit, published on GitHub under the CC-BY-NC-4.0 license. It is a 2-layer board measuring 50 × 160 mm, with 51 components from 17 distinct parts.
Other key parts include the MCP3428 and TL074. By type, the board carries 26 resistors, 8 diodes, 5 capacitors, 4 ICs and 3 connectors.
It belongs with the audio designs in this gallery.
From the project
Input board for my 8-voice polyphonic synthesizer
https://ww1.microchip.com/downloads/en/DeviceDoc/22226a.pdf https://www.ti.com/lit/ab/sboa204a/sboa204a.pdf
Main components on the Polykit X8 Input Board
Polykit X8 Input Board bill of materials (BOM)
51 components, 17 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | MCP3428 | SOIC-14_3.9x8.7mm_P1.27mm | U1 |
| 3 | TL074 | SO-14_3.9x8.65mm_P1.27mm | U2, U3, U4 |
| 1 | X8_I2C_POWER | IDC-Header_2x05_P2.54mm_Vertical | J1 |
| 1 | JACK_BOARD | IDC-Header_2x08_P2.54mm_Vertical | J2 |
| 1 | X8_EXTERNAL_IN | Molex_KK-254_AE-6410-02A_1x02_P2.54mm_Vertical | J3 |
| 1 | B100k LVL_EXT_IN | Potentiometer_Alpha_RD901F-40-00D_Single_Vertical | RV1 |
| 1 | B100k LVL_CV1 | Potentiometer_Alpha_RD901F-40-00D_Single_Vertical | RV2 |
| 1 | B100k LVL_CV2 | Potentiometer_Alpha_RD901F-40-00D_Single_Vertical | RV3 |
| 1 | B100k LVL_CV3 | Potentiometer_Alpha_RD901F-40-00D_Single_Vertical | RV4 |
| 1 | B100k LVL_CV4 | Potentiometer_Alpha_RD901F-40-00D_Single_Vertical | RV5 |
| 8 | BAS85 | D_MiniMELF | D1, D2, D3, D4, D5, D6, D7, D8 |
| 4 | 100n | C_1206_3216Metric | C1, C3, C4, C5 |
| 1 | 10u Tantal | CP_EIA-3216-10_Kemet-I | C2 |
| 16 | 100k | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R1, R2, R3, R4, R5, R7, R8, R11 +8 |
| 4 | 82k | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R6, R12, R17, R22 |
| 4 | 1k | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R9, R10, R15, R20 |
| 2 | 10k | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R25, R26 |
Polykit X8 Input Board design files
The KiCad project lives in the polykit/polykit-x-inputboard repository on GitHub; these links point at the commit this page was built from.
- Layoutpolykit-x-inputboard.kicad_pcb
- Schematicpolykit-x-inputboard.kicad_sch
Polykit X8 Input Board: common questions
How big is the Polykit X8 Input Board?
The Polykit X8 Input Board measures 50 × 160 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Polykit X8 Input Board?
51 components, from 17 distinct parts. The full bill of materials is listed on this page.
Where can I download the Polykit X8 Input Board design files?
From the polykit/polykit-x-inputboard repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Polykit X8 Input Board design in my own project?
It is published under CC-BY-NC-4.0, which limits how it may be reused; read the license before building on it.
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