Slow bldc
About the Slow bldc PCB
Slow bldc is an open source STM32 PCB design by osrf, published on GitHub under the Apache-2.0 license. It is a 4-layer board measuring 46.1 × 45.5 mm, with 52 components from 24 distinct parts.
Its main chip is the STM32F303CCTx, from the STM32 family. Other key parts include the AS5048A, DRV8312, INA240, SN65HVD75 and R-78xx-0.5. By type, the board carries 28 capacitors, 8 ICs, 7 resistors, 6 connectors, 1 crystal and 1 diode.
It belongs with the robotics & motion designs in this gallery.
From the project
designed to the no-touch specs at Sierra Circuits: 4 layers 6mil trace/space = 0.1524mm 10mil via hole size = 0.254mm 22mil via diameter = 0.5588mm * 46mm circle outline = 1.811" x 1.811"
Main components on the Slow bldc
Slow bldc bill of materials (BOM)
52 components, 24 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | STM32F303CCTx | LQFP-48_7x7mm_Pitch0.5mm | U1 |
| 1 | AS5048A | TSSOP-14_4.4x5mm_Pitch0.65mm | U2 |
| 1 | DRV8312 | SOIC-44-POWERPAD | U3 |
| 3 | INA240 | TSSOP-8_4.4x3mm_Pitch0.65mm | U4, U5, U6 |
| 1 | SN65HVD75 | TSSOP-8_3x3mm_Pitch0.65mm | U7 |
| 1 | R-78xx-0.5 | R-78xx-0.5 | U8 |
| 1 | 8 MHz | Crystal_SMD_5032-2pin_5.0x3.2mm | X1 |
| 1 | CONN_01X02 | TerminalBlock_Pheonix_PT-3.5mm_2pol | J1 |
| 1 | USB_OTG | USB_Micro-B_10103594-0001LF | J2 |
| 1 | CONN_01X03 | TerminalBlock_Pheonix_PT-3.5mm_3pol | J3 |
| 1 | CONN_02X05 | Pin_Header_Straight_2x05_Pitch1.27mm | J4 |
| 1 | CONN_01X03 | Pin_Header_Angled_1x03_Pitch2.54mm | J5 |
| 1 | CONN_01X06 | Pin_Header_Straight_1x06_Pitch2.54mm | J6 |
| 1 | LED_Small | LED_0603 | D1 |
| 1 | ferrite | R_0603 | L1 |
| 18 | 100n | C_0603 | C1, C2, C3, C4, C6, C10, C11, C12 +10 |
| 1 | 22u | C_1206 | C5 |
| 4 | 1u | C_0603 | C7, C8, C9, C14 |
| 3 | 100u | CP_Elec_5x5.8 | C13, C27, C28 |
| 2 | 12p | C_0603 | C24, C25 |
Show 4 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 27k0 | R_0603 | R1 |
| 1 | 1 | R_0603 | R2 |
| 4 | 0R05 | R_0603 | R3, R4, R5, R7 |
| 1 | 100 | R_0603 | R6 |
Slow bldc design files
The KiCad project lives in the osrf/slow_bldc repository on GitHub; these links point at the commit this page was built from.
- Layouthw/circle.kicad_pcb
Slow bldc: common questions
What microcontroller does the Slow bldc use?
The Slow bldc is built around the STM32F303CCTx, from the STM32 family.
How big is the Slow bldc PCB?
The Slow bldc measures 46.1 × 45.5 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the Slow bldc?
52 components, from 24 distinct parts. The full bill of materials is listed on this page.
Where can I download the Slow bldc design files?
From the osrf/slow_bldc repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the Slow bldc design in my own project?
Yes, under the terms of its Apache-2.0 license, which osrf chose for the repository.
Can I test firmware for the Slow bldc 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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