Dual VCA
About the Dual VCA PCB
Dual VCA 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 70 components from 34 distinct parts.
Its main chip is the STM32F405RGT6, from the STM32 family. Other key parts include the AMS1117-3.3, TL072 and MAX6035xxUR50. By type, the board carries 29 resistors, 25 capacitors, 6 ICs, 3 connectors and 1 diode.
It belongs with the audio designs in this gallery.
From the project
modular analog synthesizer for a.p.
PCB with two independendent SSM2164 linear Voltage Controlled Amplifiers.
CV range: 0 volts to +5 volts. Maximum attenuation at 0 volts and unity gain at +5 volts.
Main components on the Dual VCA
Dual VCA bill of materials (BOM)
70 components, 34 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | AMS1117-3.3 SSM2164 | DIP-16_W7.62mm | U1 |
| 1 | STM32F405RGT6 TL072 | DIP-8_W7.62mm | U2 |
| 3 | TL072 | DIP-8_W7.62mm | U3, U4, U5 |
| 1 | MAX6035xxUR50 | SOT-23_Handsoldering | U6 |
| 1 | VCA_1_port | PinHeader_1x05_P2.54mm_Vertical | J1 |
| 1 | VCA_2_port | PinHeader_1x05_P2.54mm_Vertical | J2 |
| 1 | power_input | PinHeader_2x05_P2.54mm_Vertical | J7 |
| 4 | 100k | Potentiometer_Alpha_RD901F-40-00D_Single_Vertical | RV1, RV2, RV3, RV4 |
| 2 | 10k | Potentiometer_Alpha_RD901F-40-00D_Single_Vertical | RV5, RV6 |
| 1 | B5819W BAT48 | D_A-405_P10.16mm_Horizontal | D1 |
| 1 | 10UF 100pF | C_Disc_D4.3mm_W1.9mm_P5.00mm | C1 |
| 2 | 100NF 22pF | C_Disc_D4.3mm_W1.9mm_P5.00mm | C2, C7 |
| 2 | 100NF 560pF | C_Disc_D4.3mm_W1.9mm_P5.00mm | C3, C9 |
| 2 | 10UF 560pF | C_Disc_D4.3mm_W1.9mm_P5.00mm | C4, C8 |
| 1 | 10NF 100pF | C_Disc_D4.3mm_W1.9mm_P5.00mm | C5 |
| 2 | 100NF 100pF | C_Disc_D4.3mm_W1.9mm_P5.00mm | C6, C10 |
| 2 | 100NF 100nF | C_Rect_L7.2mm_W2.5mm_P5.00mm_FKS2_FKP2_MKS2_MKP2 | C11, C12 |
| 2 | 100NF 100nF | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C13, C14 |
| 1 | 2.2UF 100nF | C_Rect_L7.2mm_W2.5mm_P5.00mm_FKS2_FKP2_MKS2_MKP2 | C15 |
| 1 | 2.2UF 100nF | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C16 |
Show 14 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | 12PF 100nF | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C17, C18 |
| 5 | 100nF | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C19, C20, C21, C24, C25 |
| 2 | 10uF | CP_Radial_D6.3mm_P2.50mm | C22, C23 |
| 2 | 2K2 100k | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1, R3 |
| 2 | 10K 100k | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R2, R4 |
| 1 | 100 1k | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R5 |
| 1 | 1k | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R6 |
| 8 | 100k | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R7, R8, R11, R14, R15, R18, R28, R29 |
| 4 | 510 | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R9, R12, R16, R19 |
| 4 | 30k | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R10, R13, R17, R20 |
| 2 | 10k | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R21, R22 |
| 1 | opt | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R23 |
| 2 | 10M | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R24, R26 |
| 2 | 4k7 | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R25, R27 |
Dual VCA 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 VCA: common questions
What microcontroller does the Dual VCA use?
The Dual VCA is built around the STM32F405RGT6, from the STM32 family.
How big is the Dual VCA PCB?
The Dual VCA measures 99.1 × 99.1 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Dual VCA?
70 components, from 34 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 VCA 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 VCA 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 VCA 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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