Dual MS20 VCF
About the Dual MS20 VCF PCB
Dual MS20 VCF is an open source STM32 PCB design by JordanAceto, published on GitHub under the CC-BY-4.0 license. It is a 2-layer board measuring 99.1 × 99.1 mm, with 91 components from 36 distinct parts.
Its main chip is the STM32F405RGT6, from the STM32 family. Other key parts include the AMS1117-3.3, MC1458, LM13700 and TL072. By type, the board carries 42 resistors, 24 capacitors, 7 ICs, 4 transistors, 4 connectors and 4 diodes.
It belongs with the audio designs in this gallery.
From the project
modular analog synthesizer for a.p.
PCB with two independendent late MS20 style VCFs, one configured as a high-pass filter and one configured as a low-pass filter.
An extra summing amplifier is provided to create a parallel HPF/LPF response. Series HPF into LPF response is easily achived with switching jack normalization.
Main components on the Dual MS20 VCF
Dual MS20 VCF bill of materials (BOM)
91 components, 36 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | AMS1117-3.3 LM13700 | DIP-16_W7.62mm | U1 |
| 1 | STM32F405RGT6 MC1458 | DIP-8_W7.62mm | U2 |
| 3 | MC1458 | DIP-8_W7.62mm | U3, U5, U6 |
| 1 | LM13700 | DIP-16_W7.62mm | U4 |
| 1 | TL072 | DIP-8_W7.62mm | U7 |
| 4 | BC558 | TO-92_Inline | Q1, Q2, Q3, Q4 |
| 2 | Conn_01x05 | PinHeader_1x05_P2.54mm_Vertical | J1, J2 |
| 1 | power_in | PinHeader_2x05_P2.54mm_Vertical | J3 |
| 1 | lpf_output_normal | PinHeader_1x02_P2.54mm_Vertical | J4 |
| 6 | 100k | Potentiometer_Alpha_RD901F-40-00D_Single_Vertical | RV1, RV2, RV3, RV4, RV5, RV6 |
| 1 | B5819W green | LED_D5.0mm | D1 |
| 1 | C2286 green | LED_D5.0mm | D2 |
| 1 | C72043 green | LED_D5.0mm | D3 |
| 1 | green | LED_D5.0mm | D4 |
| 1 | 10UF 1nF | C_Rect_L7.0mm_W2.5mm_P5.00mm | C1 |
| 2 | 100NF 4n7 | C_Rect_L7.0mm_W2.5mm_P5.00mm | C2, C6 |
| 2 | 100NF 1nF | C_Rect_L7.0mm_W2.5mm_P5.00mm | C3, C7 |
| 2 | 10UF 470nF | C_Rect_L7.0mm_W3.5mm_P5.00mm | C4, C8 |
| 1 | 10NF 1nF | C_Rect_L7.0mm_W2.5mm_P5.00mm | C5 |
| 2 | 100NF 10uF | CP_Radial_D6.3mm_P2.50mm | C9, C10 |
Show 16 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 4 | 100NF 100nF | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C11, C12, C13, C14 |
| 2 | 2.2UF 100nF | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C15, C16 |
| 2 | 12PF 100nF | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C17, C18 |
| 6 | 100nF | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C19, C20, C21, C22, C23, C24 |
| 2 | 2K2 220 | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1, R3 |
| 1 | 10K 10k | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R2 |
| 1 | 10K 100k | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R4 |
| 1 | 100 100k | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R5 |
| 2 | 240k | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R6, R24 |
| 12 | 10k | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R7, R11, R13, R14, R17, R18, R20, R25 +4 |
| 4 | 1k8 | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R8, R16, R26, R34 |
| 2 | 470k | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R9, R27 |
| 2 | 4k7 | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R10, R28 |
| 6 | 220 | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R12, R15, R19, R21, R30, R33 |
| 7 | 100k | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R22, R23, R36, R37, R38, R39, R41 |
| 2 | 1k | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R40, R42 |
Dual MS20 VCF design files
The KiCad project lives in the JordanAceto/angelo_modular repository on GitHub; these links point at the commit this page was built from.
Dual MS20 VCF: common questions
What microcontroller does the Dual MS20 VCF use?
The Dual MS20 VCF is built around the STM32F405RGT6, from the STM32 family.
How big is the Dual MS20 VCF PCB?
The Dual MS20 VCF measures 99.1 × 99.1 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Dual MS20 VCF?
91 components, from 36 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 Dual MS20 VCF design files?
From the JordanAceto/angelo_modular repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.
Can I use the Dual MS20 VCF design in my own project?
Yes, under the terms of its CC-BY-4.0 license, which JordanAceto chose for the repository.
Can I test firmware for the Dual MS20 VCF 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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