SmallDSP Maxi
About the SmallDSP Maxi PCB
SmallDSP Maxi is an open source STM32 PCB design by Gemuesesaft, published on GitHub under the GPL-3.0 license. It is a 4-layer board measuring 120 × 120 mm, with 511 components from 45 distinct parts.
Its main chip is the STM32F030C8T6, from the STM32 family. Other key parts include the ADAU1463, H5VU25U, SN74AHC1G08DBVR, 25AA1024-I/SM and LD1085D2T33TR. By type, the board carries 228 capacitors, 128 diodes, 95 resistors, 25 connectors, 18 ICs and 5 transistors.
It belongs with the audio designs in this gallery.
From the project
a small, modular and affordable DSP Module
The goal of this Project is to create a line-up of small DSP modules, centred around an Analog Devices ADAU1463/67. This Chip is easy to program with Sigma Studio, a node based development environment and pretty powerful for its price.
Current status: - Dual: Rev 1.1: Layout finished, functionality has to be validated. - Maxi: Rev 1.0 functional, layout of rev 2.0 finished and production ready, has to be evaluated. AES17 audio measurements of rev 1.0 available. - Mini: Nothing done yet. - Micro: Nothing done yet. - Digi: Nothing done yet.
Main components on the SmallDSP Maxi
SmallDSP Maxi bill of materials (BOM)
511 components, 45 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ADAU1463 ADAU1467 Analog Devices | ADAU1463 | U1 |
| 3 | H5VU25U hongjiacheng | Diodes_UDFN-10_1.0x2.5mm_P0.5mm | U2, U3, U18 |
| 1 | SN74AHC1G08DBVR 74AHC1G08 Texas Instruments | SOT-23-5 | U4 |
| 1 | 25AA1024-I/SM Microchip | SOIC-8_5.275x5.275mm_P1.27mm | U5 |
| 1 | LD1085D2T33TR STMicroelectronics | TO-263-2 | U6 |
| 1 | TLV1117-33 Texas Instruments | SOT-223-3_TabPin2 | U7 |
| 1 | PL123-09OC Microchip | TSSOP-16_4.4x5mm_P0.65mm | U8 |
| 8 | AK4619VN AK4619 AKM(Asahi Kasei Microdevices) | QFN-32-1EP_5x5mm_P0.5mm_EP3.7x3.7mm_ThermalVias | U9, U10, U11, U12, U13, U14, U15, U16 |
| 1 | STM32F030C8T6 STM32F030C8Tx ST Microelectronics | LQFP-48_7x7mm_P0.5mm | U17 |
| 4 | 2N7002 Jiangsu Changjing Electronics Technology Co., Ltd. | SOT-23 | Q1, Q3, Q4, Q5 |
| 1 | NSS1C300ET4G onsemi | TO-252-2 thermal vias | Q2 |
| 1 | M24576J046 25.576MHz ECEC(ZheJiang E ast Crystal Elec) | Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | X50328MSB2GI 8MHz YXC | Crystal_SMD_5032-2Pin_5.0x3.2mm | Y2 |
| 2 | - Header - | PinHeader_1x04_P1.27mm_Vertical | J1, J2 |
| 8 | - Header - | PinHeader_1x03_P1.27mm_Vertical | J3, J4, J5, J6, J8, J9, J10, J11 |
| 1 | 61201021721 Programming Würth Electronik | IDC-Header_2x05_P2.54mm_Horizontal | J7 |
| 4 | - Header - | PinHeader_1x02_P1.27mm_Vertical | J12, J22, J23, J25 |
| 4 | T821120A1S100CEU IDC Amphenol | IDC-Header_2x10_P2.54mm_Vertical | J13, J14, J17, J18 |
| 1 | B6P-VH | JST_VH_B6P-VH_1x06_P3.96mm_Vertical | J15 |
| 4 | 75869-302LF IDC Amphenol | IDC-Header_2x06_P2.54mm_Vertical | J16, J19, J20, J21 |
Show 25 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | Header | WE_WR-WST_REDFIT-6_Debugging | J24 |
| 2 | TS-1187A-B-A-B XKB Connectivity | TS-1187A-B-A-B | SW1, SW2 |
| 3 | 5019 TestPoint Keystone | TestPoint_Keystone_5019_Minature | TP1, TP2, TP3 |
| 128 | RB521CS-30 TECH PUBLIC | D_SOD-923 | D1, D2, D3, D4, D5, D6, D7, D8 +120 |
| 5 | 78279220601 600R@100MHz Würth Elektronik | L_0805_2012Metric | FB1, FB2, FB3, FB4, FB5 |
| 48 | CL05B104KB54PNC 100n Samsung Electro-Mechanics | C_0402_1005Metric | C1, C2, C7, C8, C60, C61, C66, C69 +40 |
| 1 | CL05C151JB5NNNC 150p Samsung Electro-Mechanics | C_0402_1005Metric | C3 |
| 1 | GRM1555C1H562JE01D 5n6 Murata Electronics | C_0402_1005Metric | C4 |
| 4 | 0402CG270J500NT 27p FH (Guangdong Fenghua Advanced Tech) | C_0402_1005Metric | C5, C6, C227, C228 |
| 33 | CL10A106MA8NRNC 10u Samsung Electro-Mechanics | C_0603_1608Metric | C9, C71, C80, C84, C86, C88, C99, C104 +25 |
| 96 | CL31A106KBHNNNE 10u Samsung Electro-Mechanics | C_1206_3216Metric | C10, C11, C12, C13, C14, C15, C16, C17 +88 |
| 16 | CL31A226KAHNNNE 22u Samsung Electro-Mechanics | C_1206_3216Metric | C42, C43, C44, C45, C46, C47, C48, C49 +8 |
| 5 | CL21A226MAQNNNE 22u Samsung Electro-Mechanics | C_0805_2012Metric | C58, C59, C62, C63, C64 |
| 4 | CL05A105KA5NQNC 1u Samsung Electro-Mechanics | C_0402_1005Metric | C65, C68, C72, C75 |
| 4 | CL05B103KB5NNNC 10n Samsung Electro-Mechanics | C_0402_1005Metric | C67, C70, C74, C77 |
| 16 | CL10A475KO8NNNC 4u7 Samsung Electro-Mechanics | C_0603_1608Metric | C109, C112, C117, C118, C119, C126, C127, C128 +8 |
| 6 | 0402WGF1001TCE 1k UNI-ROYAL(Uniroyal Elec) | R_0402_1005Metric | R1, R29, R34, R36, R45, R46 |
| 51 | 0402WGF330JTCE 33R UNI-ROYAL(Uniroyal Elec) | R_0402_1005Metric | R2, R3, R4, R5, R6, R7, R8, R9 +43 |
| 16 | 0402WGF1002TCE 10k UNI-ROYAL(Uniroyal Elec) | R_0402_1005Metric | R14, R30, R33, R40, R71, R72, R73, R74 +8 |
| 4 | 0402WGF2201TCE 2k2 UNI-ROYAL(Uniroyal Elec) | R_0402_1005Metric | R27, R28, R85, R86 |
| 5 | 0402WGF1000TCE 100R UNI-ROYAL(Uniroyal Elec) | R_0402_1005Metric | R31, R38, R87, R90, R93 |
| 5 | 0402WGF1003TCE 100k UNI-ROYAL(Uniroyal Elec) | R_0402_1005Metric | R32, R35, R88, R91, R94 |
| 1 | 0603WAF4301T5E 4k3 UNI-ROYAL(Uniroyal Elec) | R_0603_1608Metric | R39 |
| 4 | 0402WGF100KTCE 1R UNI-ROYAL(Uniroyal Elec) | R_0402_1005Metric | R41, R42, R43, R44 |
| 3 | - TBD - | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R89, R92, R95 |
SmallDSP Maxi design files
The KiCad project lives in the Gemuesesaft/SmallDSP repository on GitHub; these links point at the commit this page was built from.
SmallDSP Maxi: common questions
What microcontroller does the SmallDSP Maxi use?
The SmallDSP Maxi is built around the STM32F030C8T6, from the STM32 family.
How big is the SmallDSP Maxi PCB?
The SmallDSP Maxi measures 120 × 120 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the SmallDSP Maxi?
511 components, from 45 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 SmallDSP Maxi design files?
From the Gemuesesaft/SmallDSP repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the SmallDSP Maxi design in my own project?
Yes, under the terms of its GPL-3.0 license, which Gemuesesaft chose for the repository.
Can I test firmware for the SmallDSP Maxi 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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