SplitBoard8Voice
About the SplitBoard8Voice PCB
SplitBoard8Voice is an open source STM32 PCB design by hsetlik, published on GitHub. It is a 4-layer board measuring 310 × 199 mm, with 517 components from 101 distinct parts.
Its main chip is the STM32F411RETx, from the STM32 family. Other key parts include the TL074, DAC7578xPW, TMUX4051, TPS56528DDA and 74HC04. By type, the board carries 182 capacitors, 156 resistors, 69 diodes, 42 ICs, 29 switches and 25 connectors.
It belongs with the audio designs in this gallery.
From the project
Analog polyphonic synth powered by STM32F4
Main components on the SplitBoard8Voice
SplitBoard8Voice bill of materials (BOM)
517 components, 101 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 16 | TL074 | SOIC-14_3.9x8.7mm_P1.27mm | U201, U302, U303, U304, U305, U307, U309, U310 +8 |
| 1 | DAC7578xPW | TSSOP-16_4.4x5mm_P0.65mm | U301 |
| 7 | TMUX4051 | TSSOP-16_4.4x5mm_P0.65mm | U306, U308, U313, U314, U321, U322, U323 |
| 1 | STM32F411RETx | LQFP-64_10x10mm_P0.5mm | U401 |
| 1 | TPS56528DDA | Texas_HSOP-8-1EP_3.9x4.9mm_P1.27mm_ThermalVias | U402 |
| 1 | 74HC04 | SOIC-14_3.9x8.7mm_P1.27mm | U404 |
| 1 | 6N138 | DIP-8_W7.62mm | U405 |
| 3 | MCP23S17_SS | SSOP-28_5.3x10.2mm_P0.65mm | U501, U601, U602 |
| 1 | ILI9341 | TFTBreakout_ILI9341_340x320_86x50mm | U603 |
| 1 | TCA9548APWR | TSSOP-24_4.4x7.8mm_P0.65mm | U701 |
| 1 | L7805 | TO-220-3_Vertical | U703 |
| 1 | L7905 | TO-220-3_Vertical | U704 |
| 2 | 74HC74 | SOIC-14_3.9x8.7mm_P1.27mm | U1001, U1003 |
| 2 | 74HC595 | SOIC-16_3.9x9.9mm_P1.27mm | U1002, U1005 |
| 1 | 74HC08 | SOIC-14_3.9x8.7mm_P1.27mm | U1004 |
| 2 | 74HC14 | SOIC-14_3.9x8.7mm_P1.27mm | U1006, U1007 |
| 1 | 16MHz | Crystal_SMD_EuroQuartz_MT-4Pin_3.2x2.5mm | Y401 |
| 1 | 32.768kHZ | Crystal_SMD_SeikoEpson_MC306-4Pin_8.0x3.2mm | Y402 |
| 1 | AUDIO_OUT | PinHeader_1x03_P2.54mm_Vertical | J201 |
| 1 | PWR | PinHeader_1x05_P2.54mm_Vertical | J401 |
Show 81 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | DATA | PinHeader_1x03_P2.54mm_Vertical | J402 |
| 1 | SWD Header | PinHeader_1x06_P2.54mm_Vertical | J403 |
| 1 | MIDI_In | PinSocket_1x02_P2.54mm_Vertical | J404 |
| 1 | Micro_SD_Card_Det2 | microSD_HC_Hirose_DM3D-SF | J405 |
| 1 | MIDI_Out | PinHeader_1x03_P2.54mm_Vertical | J406 |
| 1 | MIDI_Thru | PinHeader_1x03_P2.54mm_Vertical | J407 |
| 1 | POWER | PinHeader_2x05_P2.54mm_Vertical | J408 |
| 8 | VoiceBoardConn_20P_200P | PinHeader_2x10_P2.00mm_Vertical | J701, J702, J703, J704, J705, J706, J707, J708 |
| 1 | A_UPPER | PinSocket_1x04_P2.54mm_Vertical | J801 |
| 1 | B_UPPER | PinHeader_1x08_P2.54mm_Vertical | J802 |
| 1 | C_UPPER | PinSocket_1x09_P2.54mm_Vertical | J803 |
| 1 | D_UPPER | PinSocket_1x03_P2.54mm_Vertical | J804 |
| 1 | A_LOWER | PinSocket_1x04_P2.54mm_Vertical | J901 |
| 1 | B_LOWER | PinHeader_1x08_P2.54mm_Vertical | J902 |
| 1 | C_LOWER | PinSocket_1x09_P2.54mm_Vertical | J903 |
| 1 | D_LOWER | PinSocket_1x03_P2.54mm_Vertical | J904 |
| 1 | ENC_CF | RotaryEncoder_Alps_EC12E_Vertical_H20mm_NOMP | RE601 |
| 1 | ENCA | RotaryEncoder_Alps_EC12E_Vertical_H20mm_NOMP | RE602 |
| 1 | ENC_RES | RotaryEncoder_Alps_EC12E_Vertical_H20mm_NOMP | RE603 |
| 1 | ENCB | RotaryEncoder_Alps_EC12E_Vertical_H20mm_NOMP | RE604 |
| 1 | ENCC | RotaryEncoder_Alps_EC12E_Vertical_H20mm_NOMP | RE605 |
| 1 | ENC_PWM | RotaryEncoder_Alps_EC12E_Vertical_H20mm_NOMP | RE606 |
| 1 | ENC_DEPTH | RotaryEncoder_Alps_EC12E_Vertical_H20mm_NOMP | RE607 |
| 1 | ENCD | RotaryEncoder_Alps_EC12E_Vertical_H20mm_NOMP | RE608 |
| 1 | ENC_FOLD | RotaryEncoder_Alps_EC12E_Vertical_H20mm_NOMP | RE609 |
| 1 | 100kA | Potentiometer_Bourns_PTV09A-1_Single_Vertical | RV801 |
| 1 | RST | SW_SPST_B3U-1000P | SW401 |
| 1 | BOOT | SW_SPST_B3U-1000P | SW402 |
| 1 | SB | SW_PUSH_6mm | SW501 |
| 1 | MS1 | SW_PUSH_6mm | SW502 |
| 1 | MD1 | SW_PUSH_6mm | SW503 |
| 1 | MS2 | SW_PUSH_6mm | SW504 |
| 1 | MD2 | SW_PUSH_6mm | SW505 |
| 1 | MS3 | SW_PUSH_6mm | SW506 |
| 1 | MD3 | SW_PUSH_6mm | SW507 |
| 1 | MS4 | SW_PUSH_6mm | SW508 |
| 1 | MD4 | SW_PUSH_6mm | SW509 |
| 1 | MS5 | SW_PUSH_6mm | SW510 |
| 1 | MD5 | SW_PUSH_6mm | SW511 |
| 1 | MS6 | SW_PUSH_6mm | SW512 |
| 1 | MD6 | SW_PUSH_6mm | SW513 |
| 1 | MD7 | SW_PUSH_6mm | SW514 |
| 1 | MD8 | SW_PUSH_6mm | SW515 |
| 1 | ENV1_B | SW_PUSH_6mm | SW601 |
| 1 | ENV2_B | SW_PUSH_6mm | SW602 |
| 2 | HP_B | SW_PUSH_6mm | SW603, SW606 |
| 1 | LFO1_B | SW_PUSH_6mm | SW604 |
| 1 | LFO2_B | SW_PUSH_6mm | SW605 |
| 1 | LFO3_B | SW_PUSH_6mm | SW607 |
| 1 | FF_B | SW_PUSH_6mm | SW608 |
| 1 | MIX1_B | SW_PUSH_6mm | SW609 |
| 1 | MIX2_B | SW_PUSH_6mm | SW610 |
| 1 | ENC_MENU | RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm_5Pin | SW611 |
| 1 | ALT_B | SW_PUSH_6mm | SW612 |
| 1 | 1N4148 | D_SOD-123 | D401 |
| 3 | PMEG3030 | D_SOD-123 | D402, D403, D404 |
| 65 | SK6812 | LED_SK6812_PLCC4_5.0x5.0mm_P3.2mm | D501, D502, D503, D504, D505, D506, D507, D508 +57 |
| 1 | 90R | L_0805_2012Metric | FB401 |
| 1 | 2.2uH | L_Abracon_ASPI-4030S | L401 |
| 86 | 100n | C_0805_2012Metric | C201, C202, C302, C303, C304, C305, C306, C307 +78 |
| 5 | 1u | C_0805_2012Metric | C203, C702, C703, C704, C705 |
| 2 | 4u7 | C_0805_2012Metric | C301, C410 |
| 57 | 470n | C_0805_2012Metric | C317, C318, C319, C320, C321, C322, C323, C324 +49 |
| 4 | 6p | C_0805_2012Metric | C401, C402, C403, C407 |
| 4 | 10u | C_0805_2012Metric | C405, C418, C419, C627 |
| 2 | 2u2 | C_0805_2012Metric | C413, C414 |
| 2 | 22u | C_0805_2012Metric | C422, C423 |
| 20 | 10n | C_0805_2012Metric | C604, C605, C606, C607, C608, C609, C610, C611 +12 |
| 19 | 100k | R_0805_2012Metric | R201, R202, R203, R204, R205, R206, R208, R209 +11 |
| 52 | 47k | R_0805_2012Metric | R207, R305, R413, R442, R501, R502, R503, R504 +44 |
| 2 | 470 | R_0805_2012Metric | R212, R213 |
| 2 | 3k3 | R_0805_2012Metric | R301, R302 |
| 3 | 10k | R_0805_2012Metric | R303, R304, R702 |
| 2 | 27k | R_0805_2012Metric | R308, R310 |
| 6 | LOOP | R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R311, R427, R445, R446, R716, R1017 |
| 43 | 22R | R_0805_2012Metric | R403, R404, R405, R406, R407, R408, R409, R410 +35 |
| 1 | 12k | R_0805_2012Metric | R425 |
| 1 | 2k7 | R_0805_2012Metric | R426 |
| 6 | 220 | R_0805_2012Metric | R436, R437, R440, R441, R443, R444 |
| 1 | 4k7 | R_0805_2012Metric | R439 |
| 18 | 2k2 | R_0805_2012Metric | R701, R703, R704, R705, R706, R707, R708, R709 +10 |
SplitBoard8Voice design files
The KiCad project lives in the hsetlik/PolySynth repository on GitHub; these links point at the commit this page was built from.
SplitBoard8Voice: common questions
What microcontroller does the SplitBoard8Voice use?
The SplitBoard8Voice is built around the STM32F411RETx, from the STM32 family.
How big is the SplitBoard8Voice PCB?
The SplitBoard8Voice measures 310 × 199 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the SplitBoard8Voice?
517 components, from 101 distinct parts. The full bill of materials is listed on this page.
Where can I download the SplitBoard8Voice design files?
From the hsetlik/PolySynth repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the SplitBoard8Voice design in my own project?
The repository has no license, so all rights stay with hsetlik. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the SplitBoard8Voice without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.
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