2 layers40 × 160 mm
Polykit x jackboard
polykit/polykit-x-inputboard
Input board for my 8-voice polyphonic synthesizer
18 parts
2 layers50 × 160 mm
Polykit x inputboard
polykit/polykit-x-inputboardInput board for my 8-voice polyphonic synthesizer
- Size
- 50 × 160 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 80
- Nets
- 43
- Pads
- 187
- Tracks, vias
- 340, 35
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 6 May 2025
- Updated
- 9 May 2025
Overview
Polykit x inputboard is an open-source printed circuit board by polykit, from the polykit/polykit-x-inputboard repository on GitHub. It is a 2-layer board of 50 × 160 mm with 80 parts on 43 nets, routed with 340 tracks and 35 vias.
It is built around the MCP3428-E/SL and BAS85. Its parts include 26 resistors, 8 diodes, 5 capacitors, 4 ICs and 3 connectors.
Main components
2
MCP3428-E/SL
SOIC-14-40℃~+125℃ 135uA 15Hz 16 2.7V~5.5V 4 Auto calibration、Power-on reset、Bipolar input Built-in Built-in I2C Sigma-Delta Support Yes SOIC-14 Analog to Digital Converters (ADC) ROHSMicrochip TechnologyAnalog To Digital Converters (ADC)
BAS85
MiniMELF1 Independent 2.3uA@25V 200mA 30V 5A 800mV@100mA MiniMELF Schottky Diodes ROHSNexperiaSchottky Diodes
README
README.mdParts
80| Qty | Value | Footprint | References |
|---|---|---|---|
| 20 | LOGO | Polykit2:star-silk-tiny | G***, G***, G***, G***, G***, G***, G***, G***, G***, G***, G***, G***, G***, G***, G***, G*** +4 |
| 16 | 100k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R1, R2, R3, R4, R5, R7, R8, R11, R13, R14, R16, R18, R19, R21, R23, R24 |
| 8 | BAS85 | Diode_SMD:D_MiniMELF | D1, D2, D3, D4, D5, D6, D7, D8 |
| 8 | LOGO | Polykit2:blitz-silk-supertiny | G***, G***, G***, G***, G***, G***, G***, G*** |
| 4 | 100n | Capacitor_SMD:C_1206_3216Metric | C1, C3, C4, C5 |
| 4 | 1k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R9, R10, R15, R20 |
| 4 | 82k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R6, R12, R17, R22 |
| 3 | TL074 | Package_SO:SO-14_3.9x8.65mm_P1.27mm | U2, U3, U4 |
| 2 | 10k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R25, R26 |
| 1 | 10u Tantal | Capacitor_Tantalum_SMD:CP_EIA-3216-10_Kemet-I | C2 |
| 1 | B100k LVL_CV1 | Potentiometer_THT:Potentiometer_Alpha_RD901F-40-00D_Single_Vertical | RV2 |
| 1 | B100k LVL_CV2 | Potentiometer_THT:Potentiometer_Alpha_RD901F-40-00D_Single_Vertical | RV3 |
| 1 | B100k LVL_CV3 | Potentiometer_THT:Potentiometer_Alpha_RD901F-40-00D_Single_Vertical | RV4 |
| 1 | B100k LVL_CV4 | Potentiometer_THT:Potentiometer_Alpha_RD901F-40-00D_Single_Vertical | RV5 |
| 1 | B100k LVL_EXT_IN | Potentiometer_THT:Potentiometer_Alpha_RD901F-40-00D_Single_Vertical | RV1 |
| 1 | JACK_BOARD | Connector_IDC:IDC-Header_2x08_P2.54mm_Vertical | J2 |
| 1 | LOGO | Polykit2:logo-3.5cm | G*** |
| 1 | MCP3428 | Package_SO:SOIC-14_3.9x8.7mm_P1.27mm | U1 |
| 1 | X8_EXTERNAL_IN | Connector_Molex:Molex_KK-254_AE-6410-02A_1x02_P2.54mm_Vertical | J3 |
| 1 | X8_I2C_POWER | Connector_IDC:IDC-Header_2x05_P2.54mm_Vertical | J1 |
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Questions
How big is the Polykit x inputboard PCB?
It measures 50 × 160 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Polykit x inputboard use?
80 parts, built around the MCP3428-E/SL and BAS85. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Polykit x inputboard KiCad files?
From the polykit/polykit-x-inputboard repository on GitHub, at the commit this page was made from: the board is polykit-x-inputboard.kicad_pcb and its schematic jack-board/polykit-x-jackboard.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Polykit x inputboard design in my own project?
Its repository states no licence, so its author keeps all rights: ask polykit before reusing the design.