Cheap-FOCer-2
About the Cheap-FOCer-2 PCB
Cheap-FOCer-2 is an open source STM32 PCB design by shamansystems, published on GitHub. It is a board measuring 59.1 × 99.9 mm, with 165 components from 57 distinct parts.
Its main chip is the STM32F405RGT6, from the STM32 family. Other key parts include the AMS1117-3.3, DRV8301, TP2604-SR, TJA1051T/3/1J and BMI160. By type, the board carries 68 resistors, 67 capacitors, 7 connectors, 6 ICs, 6 transistors and 6 diodes.
It belongs with the robotics & motion designs in this gallery.
From the project
Low-Cost Motor Controller based on the VESC 6
Low-Cost(around $120 for 5 boards and components) Motor Controller based on the VESC 6
* 35A continuous and 70A peak with good heat sinking. These are real values. Not marketing numbers
* Up to 50.4V(12s) safe operating voltage. For 20s version take a look at these FOCers.
* Compatible with the VESC Tool for configuration
* “Living” LCSC BOM to come. BOM document to be continuously updated with compatible and stocked components from LCSC
Main components on the Cheap-FOCer-2
Cheap-FOCer-2 bill of materials (BOM)
165 components, 57 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | AMS1117-3.3 | SOT-223-3_TabPin2 | U1 |
| 1 | DRV8301 | HTSSOP-56-1EP_6.1x14mm_P0.5mm_EP3.61x6.35mm | U2 |
| 1 | TP2604-SR | SOIC-8_3.9x4.9mm_P1.27mm | U3 |
| 1 | TJA1051T/3/1J | SOIC-8_3.9x4.9mm_P1.27mm | U4 |
| 1 | STM32F405RGT6 | LQFP-64_10x10mm_P0.5mm | U5 |
| 1 | BMI160 | Bosch_LGA-14_3x2.5mm_P0.5mm | U6 |
| 6 | NCEP60T20 | TO-220-3_Horizontal_TabUp_no_hole | Q1, Q2, Q3, Q4, Q5, Q6 |
| 1 | C115962 8MHz 10ppm (X50328MSB2GI) | Crystal_SMD_5032-2Pin_5.0x3.2mm | X1 |
| 1 | CONN_01X02 Conn_01x02 | JST_PH_B2B-PH-K_1x02_P2.00mm_Vertical | J1 |
| 1 | CONN_01X07 Conn_01x07 | JST_PH_B7B-PH-K_1x07_P2.00mm_Vertical | J2 |
| 1 | CONN_01X03 Conn_01x03 | JST_PH_B3B-PH-K_1x03_P2.00mm_Vertical | J3 |
| 1 | C131337 On/Off | JST_PH_B2B-PH-K_1x02_P2.00mm_Vertical | J4 |
| 1 | C225290 UNUSED MCU PINS | PinHeader_2x05_P2.00mm_Vertical | J5 |
| 1 | C131342 HALL/Encoder | JST_PH_B6B-PH-K_1x06_P2.00mm_Vertical | P4 |
| 1 | C225480 SWD | PinHeader_1x05_P2.54mm_Vertical | P5 |
| 1 | SLJ | Sam_J | H3 |
| 1 | C76589 NTC 10k | R_0603_1608Metric | NTC1 |
| 1 | C145795 USB Micro U-D-M5DD-W-1 | USB_Micro-B_Wuerth_614105150721_Vertical | USB1 |
| 2 | SMF05CT1G | SOT-363_SC-70-6 | D1, D2 |
| 1 | C2286 RED | LED_0603_1608Metric | D3 |
Show 37 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | C72043 GRN | LED_0603_1608Metric | D4 |
| 1 | C72041 BLU | LED_0603_1608Metric | D5 |
| 1 | C360437 100v, 1A | D_SMA | D6 |
| 1 | 22U 22u | L_Taiyo-Yuden_NR-60xx_HandSoldering | L1 |
| 9 | 100N 100n | C_0603_1608Metric | C1, C6, C7, C17, C32, C52, C59, C60 +1 |
| 2 | 0.01UF 0.01uF | C_0603_1608Metric | C2, C3 |
| 1 | 0.01UF .01uF | C_0603_1608Metric | C4 |
| 11 | 2.2U 2.2u | C_0603_1608Metric | C5, C8, C45, C46, C47, C48, C49, C53 +3 |
| 6 | 22UF 22uf | C_0805_2012Metric | C9, C10, C11, C20, C21, C22 |
| 1 | 6.8N 6.8n | C_0603_1608Metric | C12 |
| 1 | 150P 120p | C_0603_1608Metric | C13 |
| 1 | 15NF 15nF | C_0603_1608Metric | C14 |
| 2 | C385986 4.7uF, 100V | C_1210_3225Metric | C15, C31 |
| 13 | 1NF 1nF | C_0603_1608Metric | C16, C29, C33, C34, C44, C57, C58, C61 +5 |
| 3 | 220N 220n | C_0603_1608Metric | C18, C24, C27 |
| 5 | 2.2U 2.2uF | C_0603_1608Metric | C19, C25, C26, C28, C30 |
| 1 | 22N 22n | C_0603_1608Metric | C23 |
| 3 | C153035 10uF, 100V | C_2220_5650Metric_Pad1.97x5.40mm_HandSolder | C35, C36, C37 |
| 2 | C437643 330u, 63V | CP_10x20mm_hor_with_model_brd_edge | C38, C39 |
| 3 | C21217 4.7nF, 100V | C_0805_2012Metric | C40, C41, C42 |
| 1 | 100N 0.1u | C_0603_1608Metric | C43 |
| 2 | 15P 15p | C_0603_1608Metric | C50, C51 |
| 4 | 39K 39k | R_0603_1608Metric | R1, R27, R31, R36 |
| 9 | 2K2 2k2 | R_0603_1608Metric | R2, R12, R15, R16, R17, R25, R29, R32 +1 |
| 2 | 22R | R_0603_1608Metric | R3, R4 |
| 7 | 100R | R_0603_1608Metric | R5, R6, R7, R8, R9, R10, R11 |
| 6 | 10K 10k | R_0603_1608Metric | R13, R14, R22, R23, R34, R35 |
| 1 | 3.3K 3.3k | R_0603_1608Metric | R18 |
| 1 | 220K 220k | R_0603_1608Metric | R19 |
| 1 | 15K 15k | R_0603_1608Metric | R20 |
| 1 | 18K 18k | R_0603_1608Metric | R21 |
| 8 | 1k | R_0603_1608Metric | R24, R26, R28, R30, R66, R67, R69, R70 |
| 12 | 10R | R_0805_2012Metric | R33, R37, R39, R41, R42, R43, R47, R48 +4 |
| 6 | 4.7K 4.7k | R_0603_1608Metric | R44, R45, R46, R50, R51, R52 |
| 6 | 0.001R | R_2512_Yageo_big_pads | R56, R57, R58, R59, R60, R61 |
| 2 | 56R 60 | R_0603_1608Metric | R62, R63 |
| 2 | 20K 20k | R_0603_1608Metric | R64, R65 |
Cheap-FOCer-2 design files
The KiCad project lives in the shamansystems/Cheap-FOCer-2 repository on GitHub; these links point at the commit this page was built from.
Cheap-FOCer-2: common questions
What microcontroller does the Cheap-FOCer-2 use?
The Cheap-FOCer-2 is built around the STM32F405RGT6, from the STM32 family.
How big is the Cheap-FOCer-2 PCB?
The Cheap-FOCer-2 measures 59.1 × 99.9 mm and is 1 mm thick.
How many components are on the Cheap-FOCer-2?
165 components, from 57 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 Cheap-FOCer-2 design files?
From the shamansystems/Cheap-FOCer-2 repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.
Can I use the Cheap-FOCer-2 design in my own project?
The repository has no license, so all rights stay with shamansystems. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Cheap-FOCer-2 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.
Similar boards
STM32AxxSolder
AxxAxx
39 × 82.5 mm122 parts2LGPL-3.01.7k
STM32AIOC
skuep
21 × 31.5 mm47 parts2LMIT1.4k
STM32Ferris
pierrechevalier83
208.8 × 86.8 mm102 parts2LSHL-2.11.3k
STM32Module 16S
stuartpittaway
71.1 × 89.6 mm113 parts4LCC-BY-NC-4.01.1k
STM32Djinn
tzarc
192.3 × 150.5 mm216 parts2LCERN-OHL-S-2.0988
STM32Ghoul
228.6 × 79.4 mm163 parts2LCERN-OHL-S-2.0988