Courant
About the Courant PCB
Courant is an open source FPGA PCB design by KrasForge, published on GitHub under the MIT license. It is a 6-layer board measuring 160 × 100 mm, with 180 components from 53 distinct parts.
Its main chip is the XC7A50T-1FTG256I, from the FPGA family. Other key parts include the W25Q64JVSSIQ, PCM5102APWR, MCP3208-CI/SL, REF3125AIDBZR and MCP6002-I/SN. By type, the board carries 94 capacitors, 60 resistors, 11 ICs, 6 connectors, 4 diodes and 3 inductors.
It belongs with the audio designs in this gallery.
From the project
A 2D finite-difference physical-modeling synthesis engine in structural VHDL: a vibrating membrane/plate/gong solved on FPGA fabric, with a nonlinear chaos term, playable polyphonically over MIDI/CV.
The PCB in this folder passes Backplane KiCad 10.0.6 DRC: 0 errors, 0 warnings, 0 unconnected, with unchanged project rules. Current counts: 2,158 track segments and 299 vias. See MAINBOARDREPAIR.md and nativechecks/drc.json.
The assembly STEP, mechanical PDF/DXF, dist/ PCB copies, 2D views, Gerbers, drills, placement data, BOM/netlist metadata and dist/courant-fab.zip have been regenerated from the current repaired native board. Use hardware/refreshoutputs.py` for future review-export refreshes. Legacy route/reconstruction scripts are guarded from overwriting the authoritative native PCB.
Main components on the Courant
Courant bill of materials (BOM)
180 components, 53 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | XC7A50T-1FTG256I AMD/Xilinx | XC7A50T_1FTG256I_FTG256 | U1 |
| 1 | W25Q64JVSSIQ Winbond | W25Q64JVSSIQ_SOIC8_208mil | U2 |
| 1 | PCM5102APWR Texas Instruments | PCM5102APWR_TSSOP20 | U3 |
| 1 | MCP3208-CI/SL Microchip | MCP3208_CI_SL_SOIC16 | U4 |
| 1 | REF3125AIDBZR Texas Instruments | REF3125AIDBZR_SOT23 | U5 |
| 1 | MCP6002-I/SN Microchip | MCP6002_I_SN_SOIC8 | U6 |
| 1 | MCP6561T-E/OT Microchip | MCP6561T_E_OT_SOT23_5 | U7 |
| 1 | H11L1M onsemi | H11L1M_DIP6 | U8 |
| 3 | TPS62130ARGTR Texas Instruments | TPS62130ARGTR_WQFN16 | U11, U12, U13 |
| 1 | ASE-100.000MHZ-LC-T Abracon | Abracon_ASE_3225_4Pin | Y1 |
| 1 | ASE-12.288MHZ-LC-T Abracon | Abracon_ASE_3225_4Pin | Y2 |
| 1 | 22-23-2021 Molex | Molex_22_23_2021_RowY | J1 |
| 1 | 22-23-2061 Molex | Molex_22_23_2061 | J2 |
| 2 | 22-23-2021 Molex | Molex_22_23_2021_RowX | J3, J4 |
| 2 | IPT1-110-06-L-D Samtec | Samtec_IPT1_110_06_L_D | J17, J18 |
| 3 | BAT54S,215 BAT54S Nexperia | Nexperia_BAT54S_215_SOT23 | D10, D11, D12 |
| 1 | 1N4148W-7-F 1N4148W Diodes Incorporated | Diodes_1N4148W_7_F_SOD123 | D20 |
| 3 | FNR4030S1R0MT 1µH Changjiang Electronics | Changjiang_FNR4030S1R0MT | L1, L2, L3 |
| 3 | GRM32ER61C476KE15L 47uF Murata | C_1210_3225Metric_A | C1, C140, C141 |
| 4 | CL21A106KAYNNNE 10uF Samsung | C_0805_2012Metric_B | C10, C20, C30, C160 |
Show 33 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 15 | CL10B104KB8NNNC 100nF Samsung | C_0603_1608Metric_Radian | C11, C21, C31, C146, C150, C151, C152, C161 +7 |
| 3 | CL21A226MAQNNNE 22uF Samsung | C_0805_2012Metric_A | C12, C22, C32 |
| 3 | CL21A226MAQNNNE 22uF Samsung | C_0805_2012Metric_B | C13, C23, C33 |
| 3 | GRM1885C1H332JA01D 3.3nF Murata | C_0603_1608Metric_Radian | C14, C24, C34 |
| 9 | TCC0201X5R104K100ZT 100nF CCTC | C_0201_0603Metric_C | C100, C103, C104, C110, C113, C116, C120, C122 +1 |
| 17 | TCC0201X5R104K100ZT 100nF CCTC | C_0201_0603Metric_D | C101, C102, C106, C107, C108, C109, C112, C114 +9 |
| 8 | TCC0201X5R104K100ZT 100nF CCTC | C_0201_0603Metric_E | C105, C123, C130, C131, C132, C133, C134, C135 |
| 3 | TCC0201X5R104K100ZT 100nF CCTC | C_0201_0603Metric_A | C111, C117, C129 |
| 1 | TCC0201X5R104K100ZT 100nF CCTC | C_0201_0603Metric_B | C137 |
| 1 | GRM32ER61C476KE15L 47uF Murata | C_1210_3225Metric_B | C142 |
| 2 | CC0805KKX7R8BB475 4.7uF Yageo | C_0805_2012Metric_B | C143, C144 |
| 1 | CC0805KKX7R8BB475 4.7uF Yageo | C_0805_2012Metric_A | C145 |
| 2 | CL10A225KO8NNNC 2.2uF Samsung | C_0603_1608Metric_Radian | C163, C164 |
| 3 | CL10B105KB8NQNC 1uF Samsung | C_0603_1608Metric_Radian | C165, C171, C173 |
| 2 | GRM1885C1H222JA01D 2.2nF Murata | C_0603_1608Metric_Radian | C167, C168 |
| 11 | GRM1885C1H103JA01D 10nF Murata | C_0603_1608Metric_Radian | C174, C175, C176, C180, C181, C182, C193, C194 +3 |
| 3 | GRM1885C1H102JA01D 1nF Murata | C_0603_1608Metric_Radian | C191, C192, C196 |
| 1 | RC0603FR-0724K9L 24.9kΩ Yageo | R_0603_1608Metric_Radian | R10 |
| 4 | RC0603FR-07100KL 100kΩ Yageo | R_0603_1608Metric_Radian | R11, R21, R31, R166 |
| 14 | RC0603FR-0710KL 10kΩ Yageo | R_0603_1608Metric_Radian | R12, R22, R32, R103, R104, R105, R106, R121 +6 |
| 1 | RC0603FR-07124KL 124kΩ Yageo | R_0603_1608Metric_Radian | R20 |
| 1 | RC0603FR-07316KL 316kΩ Yageo | R_0603_1608Metric_Radian | R30 |
| 6 | RC0603FR-074K7L 4.7kΩ Yageo | R_0603_1608Metric_Radian | R100, R101, R102, R111, R112, R113 |
| 7 | RC0603FR-0733RL 33Ω Yageo | R_0603_1608Metric_Radian | R110, R114, R115, R122, R123, R124, R125 |
| 1 | RC0603FR-071RL 1Ω Yageo | R_0603_1608Metric_Radian | R120 |
| 2 | RC0603FR-07470RL 470Ω Yageo | R_0603_1608Metric_Radian | R126, R127 |
| 13 | RC0603FR-071KL 1kΩ Yageo | R_0603_1608Metric_Radian | R131, R132, R133, R140, R141, R142, R147, R148 +5 |
| 4 | RT0603BRD0720KL 20kΩ Yageo | R_0603_1608Metric_Radian | R160, R161, R163, R164 |
| 2 | RC0603FR-07100RL 100Ω Yageo | R_0603_1608Metric_Radian | R162, R165 |
| 1 | RC0603FR-0733KL 33kΩ Yageo | R_0603_1608Metric_Radian | R167 |
| 1 | RC0603FR-0740K2L 40.2kΩ Yageo | R_0603_1608Metric_Radian | R168 |
| 1 | RC0603FR-07220RL 220Ω Yageo | R_0603_1608Metric_Radian | R180 |
| 1 | RC0603FR-072K2L 2.2kΩ Yageo | R_0603_1608Metric_Radian | R181 |
Courant design files
The KiCad project lives in the KrasForge/Courant repository on GitHub; these links point at the commit this page was built from.
Courant: common questions
What microcontroller does the Courant use?
The Courant is built around the XC7A50T-1FTG256I, from the FPGA family.
How big is the Courant PCB?
The Courant measures 160 × 100 mm, has 6 copper layers and is 1.6 mm thick.
How many components are on the Courant?
180 components, from 53 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Courant design files?
From the KrasForge/Courant repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.
Can I use the Courant design in my own project?
Yes, under the terms of its MIT license, which KrasForge chose for the repository.
Can I test firmware for the Courant without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug FPGA firmware against it before you order a PCB.
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