HardLabs

Smart Knob

danielzyy·Smart_Knob·Electrical/smart_knob.kicad_pcb

Smart Knob PCB layout, top view — open source STM32 board by danielzyy

About the Smart Knob PCB

Smart Knob is an open source STM32 PCB design by danielzyy, published on GitHub under the Apache-2.0 license. It is a 4-layer board measuring 50 × 50 mm, with 68 components from 31 distinct parts.

Its main chip is the STM32F401RET6, from the STM32 family. Other key parts include the DRV8311H, LD3985M33R_SOT23, TXU0101 and TLV493D. By type, the board carries 33 capacitors, 11 diodes, 9 resistors, 5 ICs, 5 connectors and 2 jumpers.

It belongs with the robotics & motion designs in this gallery.

From the project

A multifunctional smart knob capable of simulating haptic feedback using a BLDC motor.

Main components on the Smart Knob

DRV8311HLD3985M33R_SOT23TXU0101TLV493DSTM32F401RET6

Smart Knob bill of materials (BOM)

68 components, 31 distinct parts.

QtyPartRefs
1
DRV8311H
U1
1
LD3985M33R_SOT23
U2
1
TXU0101
U3
1
TLV493D
U4
1
STM32F401RET6
STM32F401Rx
U5
1
16MHz
Y1
1
Conn_01x04_Male
J1
1
USB_C_Receptacle_USB2.0
J2
1
Conn_01x08_Male
J3
1
Conn_01x03_Male
J4
1
Barrel_Jack_Switch
J5
1
Jumper_2_Bridged
JP1
1
Jumper_2_Open
JP2
1
SW_SPDT
SW1
2
D_TVS
D1, D2
1
GREEN
D3
8
IN-PI42TASPRPGPB
D4, D5, D6, D7, D8, D9, D10, D11
1
100R @ 100MHz
FB1
14
100n
C1, C2, C6, C7, C10, C12, C16, C18 +6
7
1u
C3, C9, C13, C15, C20, C29, C32
Show 11 more
QtyPartRefs
6
10u
C4, C5, C8, C11, C17, C21
2
10n
C14, C28
1
22u
C19
2
10p
C30, C31
1
4.7u
C33
3
5k1
R1, R2, R5
1
R_Variable
R3
1
3k3
R4
2
4k7
R6, R7
1
1k2
R8
1
10k
R9

Smart Knob design files

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

Smart Knob: common questions

What microcontroller does the Smart Knob use?

The Smart Knob is built around the STM32F401RET6, from the STM32 family.

How big is the Smart Knob PCB?

The Smart Knob measures 50 × 50 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Smart Knob?

68 components, from 31 distinct parts. The full bill of materials is listed on this page.

Where can I download the Smart Knob design files?

From the danielzyy/Smart_Knob repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Smart Knob design in my own project?

Yes, under the terms of its Apache-2.0 license, which danielzyy chose for the repository.

Can I test firmware for the Smart Knob 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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