Offset
About the Offset PCB
Offset is an open source STM32 PCB design by microresearch, published on GitHub. It is a 2-layer board measuring 70 × 105 mm, with 92 components from 41 distinct parts.
Its main chip is the STM32F446RET6, from the STM32 family. Other key parts include the TL071CDT, LM13700 and LM1117IDTX-5.0/NOPB. By type, the board carries 64 resistors, 14 capacitors, 6 diodes, 4 ICs and 4 transistors.
From the project
all the colours of the noise
Main components on the Offset
Offset bill of materials (BOM)
92 components, 41 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | TL071CDT TL074 STMicroelectronics | SOIC-14_3.9x8.7mm_P1.27mm | U4 |
| 1 | LM13700 | SOIC-16_3.9x9.9mm_P1.27mm | U5 |
| 1 | LM1117IDTX-5.0/NOPB LM13700 Texas Instruments | SOIC-16_3.9x9.9mm_P1.27mm | U6 |
| 1 | STM32F446RET6 TL074 STMicroelectronics | SOIC-14_3.9x8.7mm_P1.27mm | U8 |
| 4 | Q_PNP_BEC | SOT-23 | Q1, Q2, Q3, Q4 |
| 2 | 1N5819 | D_SOD-123 | D1, D2 |
| 4 | 1N4148-Diode | D_SOD-123 | D3, D4, D5, D6 |
| 1 | C0805C100J3HACTU 10u KEMET | CP_EIA-3216-18_Kemet-A | C1 |
| 1 | C0805C104J5RAC 10u KEMET | CP_EIA-3216-18_Kemet-A | C2 |
| 1 | 100P | C_0805_2012Metric | C3 |
| 3 | 100N | C_0805_2012Metric | C4, C5, C6 |
| 1 | C0805C470J5HACTU 100N KEMET | C_0805_2012Metric | C7 |
| 1 | TAJA106K010YNJ 100N AVX | C_0805_2012Metric | C8 |
| 3 | C0805C104J5RAC 100N KEMET | C_0805_2012Metric | C9, C10, C11 |
| 2 | TCJA106M020R0150E 100P AVX | C_0805_2012Metric | C12, C13 |
| 1 | TAJA106K010YNJ 100P AVX | C_0805_2012Metric | C14 |
| 2 | ERJ-6GEYJ104V 6K8 Panasonic | R_0805_2012Metric | R1, R39 |
| 1 | ERJ-6GEYJ204V 10K Panasonic | R_0805_2012Metric | R2 |
| 1 | ERJ-6GEYJ333V 330K Panasonic | R_0805_2012Metric | R3 |
| 7 | 330K | R_0805_2012Metric | R4, R27, R28, R29, R30, R31, R32 |
Show 21 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 39K | R_0805_2012Metric | R5 |
| 4 | 1K | R_0805_2012Metric | R6, R8, R9, R15 |
| 1 | 100K | R_0805_2012Metric | R7 |
| 11 | 10K | R_0805_2012Metric | R10, R11, R12, R13, R17, R19, R21, R23 +3 |
| 4 | 100R | R_0805_2012Metric | R16, R18, R20, R22 |
| 1 | ERJ-6GEYJ203V 39K Panasonic | R_0805_2012Metric | R33 |
| 1 | ERJ-6GEYJ683V 39K Panasonic | R_0805_2012Metric | R34 |
| 1 | ERJ-6GEYJ134V 39K Panasonic | R_0805_2012Metric | R35 |
| 4 | ERJ-6GEYJ104V 1K Panasonic | R_0805_2012Metric | R36, R45, R64, R68 |
| 4 | ERJ-T06J102V 1K Panasonic | R_0805_2012Metric | R37, R43, R47, R48 |
| 3 | ERJ-6GEYJ103V 1K Panasonic | R_0805_2012Metric | R38, R49, R50 |
| 1 | ERJ-6GEYJ105V 6K8 Panasonic | R_0805_2012Metric | R40 |
| 1 | ERJ-T06J102V 6K8 Panasonic | R_0805_2012Metric | R41 |
| 2 | ERJ-6GEYJ103V 100K Panasonic | R_0805_2012Metric | R42, R44 |
| 1 | ERJ-6GEYJ105V 100K Panasonic | R_0805_2012Metric | R46 |
| 3 | ERJ-6GEYJ104V 20K Panasonic | R_0805_2012Metric | R51, R57, R62 |
| 2 | ERJ-6GEYJ105V 20K Panasonic | R_0805_2012Metric | R52, R59 |
| 3 | ERJ-T06J102V 20K Panasonic | R_0805_2012Metric | R53, R58, R60 |
| 1 | ERJ-T06J102V 10K Panasonic | R_0805_2012Metric | R54 |
| 3 | ERJ-6GEYJ103V 10K Panasonic | R_0805_2012Metric | R55, R56, R61 |
| 1 | ERJ-6GEYJ204V 1K Panasonic | R_0805_2012Metric | R67 |
Offset design files
The KiCad project lives in the microresearch/allcolours repository on GitHub; these links point at the commit this page was built from.
Offset: common questions
What microcontroller does the Offset use?
The Offset is built around the STM32F446RET6, from the STM32 family.
How big is the Offset PCB?
The Offset measures 70 × 105 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Offset?
92 components, from 41 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 Offset design files?
From the microresearch/allcolours 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 Offset design in my own project?
The repository has no license, so all rights stay with microresearch. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Offset 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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