Sub Oscillator
About the Sub Oscillator PCB
Sub Oscillator 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 39.4 × 78.7 mm, with 84 components from 35 distinct parts.
Its main chip is the STM32F405RGT6, from the STM32 family. Other key parts include the AMS1117-3.3, TL072, 40106 and 4013. By type, the board carries 43 resistors, 18 capacitors, 10 ICs, 7 connectors and 4 transistors.
It belongs with the audio designs in this gallery.
From the project
modular analog synthesizer for a.p.
Small aux waveshaper pcb intended to be used with the oscillator carrier boards.
Contains two sub-oscillator circuits cascaded in series, for -1 octave and -2 octaves. Triangle, sawtooth, and variable width pulse waves are available for all octaves.
Main components on the Sub Oscillator
Sub Oscillator bill of materials (BOM)
84 components, 35 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | AMS1117-3.3 TL072 | SOIC-8_3.9x4.9mm_P1.27mm | U1 |
| 1 | STM32F405RGT6 TL072 | SOIC-8_3.9x4.9mm_P1.27mm | U2 |
| 6 | TL072 | SOIC-8_3.9x4.9mm_P1.27mm | U3, U4, U5, U6, U9, U10 |
| 1 | 40106 | SOIC-14_3.9x8.7mm_P1.27mm | U7 |
| 1 | 4013 | SOIC-14_3.9x8.7mm_P1.27mm | U8 |
| 4 | MMBF5457 | SOT-23_Handsoldering | Q1, Q2, Q3, Q4 |
| 1 | signal_inputs | PinHeader_1x05_P2.54mm_Vertical | J1 |
| 1 | pwm_inputs | PinHeader_1x03_P2.54mm_Vertical | J2 |
| 1 | power_input | PinHeader_2x05_P2.54mm_Vertical | J3 |
| 1 | signal_outputs | PinHeader_1x05_P2.54mm_Vertical | J4 |
| 3 | Conn_01x03 | PinHeader_1x03_P2.54mm_Vertical | J5, J6, J7 |
| 2 | 100k | Potentiometer_Bourns_3296W_Vertical | RV1, RV2 |
| 1 | 10UF 1nF | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C1 |
| 10 | 100NF 100nF | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C2, C3, C6, C7, C9, C10, C11, C12 +2 |
| 2 | 10UF 100nF | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C4, C8 |
| 1 | 10NF 100nF | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C5 |
| 1 | 2.2UF 100nF | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C15 |
| 1 | 2.2UF 10uF | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C16 |
| 1 | 12PF 10uF | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C17 |
| 1 | 12PF 1nF | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C18 |
Show 15 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 2K2 10k | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R1 |
| 1 | 10K 22k | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R2 |
| 1 | 2K2 100k | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R3 |
| 1 | 10K 100k | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R4 |
| 1 | 100 110k | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R5 |
| 21 | 100k | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R6, R7, R8, R9, R10, R14, R15, R18 +13 |
| 2 | 2k2 | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R11, R26 |
| 2 | 51k | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R12, R27 |
| 2 | 2M2 | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R13, R28 |
| 1 | 10k | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R19 |
| 1 | 22k | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R20 |
| 1 | 33k | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R37 |
| 3 | 120k | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R38, R39, R41 |
| 4 | 1k | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R40, R45, R46, R47 |
| 1 | dnf | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R42 |
Sub Oscillator 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.
Sub Oscillator: common questions
What microcontroller does the Sub Oscillator use?
The Sub Oscillator is built around the STM32F405RGT6, from the STM32 family.
How big is the Sub Oscillator PCB?
The Sub Oscillator measures 39.4 × 78.7 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Sub Oscillator?
84 components, from 35 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 Sub Oscillator 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 Sub Oscillator 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 Sub Oscillator 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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