HardLabs

FocMotorController

Glitch752·focMotorController

FocMotorController PCB layout, top view — open source RP2040/RP2350 board by Glitch752

About the FocMotorController PCB

FocMotorController is an open source RP2040/RP2350 PCB design by Glitch752, published on GitHub. It is a 4-layer board measuring 72.8 × 52.5 mm, with 55 components from 47 distinct parts.

Its main chip is the Arduino Nano RP2040 Connect, from the RP2040/RP2350 family. Other key parts include the 74LVC2T45DC, C77582, C2960 and C2060769. By type, the board carries 19 resistors, 14 ICs, 9 diodes, 8 capacitors, 3 connectors and 1 module.

From the project

A 12v brushless DC motor controller capable of field-oriented control) (also known as vector control), which is a control system concept that can improve the efficiency and power output of motors using current-based feedback.

A 12v brushless DC motor controller capable of field-oriented control) (also known as vector control), which is a control system concept that can improve the efficiency and power output of motors using current-based feedback.

I wanted to learn how field-oriented control systems (and brushless motor controllers in general) work, so I made a PCB from scratch!

There are a few main components I needed to choose for this project: - MOSFETs: This is pretty much just a tradeoff between efficiency, size, and price. I landed on the STM STP55NF06L power MOSFET, which has a very low static resistance…

FocMotorController, from the project README
From the project README

Main components on the FocMotorController

74LVC2T45DCC77582C2960C2060769Arduino Nano RP2040 Connect

FocMotorController bill of materials (BOM)

55 components, 47 distinct parts — part numbers from the project's BOM.

QtyPartRefs
2
74LVC2T45DC
U1, U2
1
C77582
MOSFET A low
U3
1
C77582
MOSFET B low
U4
1
C77582
MOSFET C low
U5
1
C77582
MOSFET A high
U6
1
C77582
MOSFET B high
U7
1
C77582
MOSFET C high
U8
1
C2960
IR2104 Gate Driver A
U9
1
C2960
IR2104 Gate Driver B
U10
1
C2960
IR2104 Gate Driver C
U11
1
C2060769
Amplifier A
U12
1
C2060769
Amplifier B
U13
1
C2060769
Amplifier C
U14
1
Arduino Nano RP2040 Connect
A1
1
C157920
JST-PH encoder connection
J2
1
WJ128V-5.0-3P
P1
1
C8269
Power input
P2
1
C135398
Resettable polyfuse for overcurrent protection
F1
1
C113958
SMAJ15A - TVS diode for voltage spike protection
D1
1
MBR1045G
D2
Show 27 more
QtyPartRefs
1
C3646938
Power LED (red)
D3
1
C3646937
Status LED 1 (green)
D4
1
C3646937
Status LED 2 (green)
D5
1
C3646937
Status LED 3 (green)
D6
3
C2102
Bootstrap charger
D7, D8, D9
1
C47888
470uF electrolytic
C1
1
C400087
0.1uF ceramic
C2
1
C5375966
Bootstrap A 0.1uF/25v
C3
1
C5375966
Bootstrap B 0.1uF/25v
C4
1
C5375966
Bootstrap C 0.1uF/25v
C5
1
C2927584
Decoupling B 1uF/25V
C6
1
C2927584
Decoupling A 1uF/25V
C7
1
C2927584
Decoupling C 1uF/25V
C8
1
3.3K
3.3k
R1
1
2k
R2
1
620OHM
620ohm
R3
3
100OHM
100ohm
R4, R5, R6
4
C25833
Pulldown 47k
R7, R8, R11, R13
1
C2933621
Gate BH 19.6ohm
R9
1
C2933621
Gate BL 19.6ohm
R10
1
C2933621
Gate CH 19.6ohm
R12
1
C728340
Shunt A 6uohm
R14
1
C728340
Shunt B 6uohm
R15
1
C728340
Shunt C 6uohm
R16
1
C2933621
Gate AL 19.6ohm
R19
1
C2933621
Gate CL 19.6ohm
R20
1
C2933621
Gate AH 19.6ohm
R22

FocMotorController design files

The KiCad project lives in the Glitch752/focMotorController repository on GitHub; these links point at the commit this page was built from.

FocMotorController: common questions

What microcontroller does the FocMotorController use?

The FocMotorController is built around the Arduino Nano RP2040 Connect, from the RP2040/RP2350 family.

How big is the FocMotorController PCB?

The FocMotorController measures 72.8 × 52.5 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the FocMotorController?

55 components, from 47 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 FocMotorController design files?

From the Glitch752/focMotorController 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 FocMotorController design in my own project?

The repository has no license, so all rights stay with Glitch752. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the FocMotorController without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.

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