HardLabs

DCServo

Alex-C-EE·DCServo·OLD/2. Little Boy - External (4.1A @ 36V)/1. Hardware/Little Boy - External.kicad_pcb

DCServo PCB layout, top view — open source STM32 board by Alex-C-EE
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About the DCServo PCB

DCServo is an open source STM32 PCB design by Alex-C-EE, published on GitHub. It is a 4-layer board measuring 40 × 40 mm, with 57 components from 40 distinct parts.

Its main chip is the STM32G0B1CBT6, from the STM32 family. Other key parts include the LMR33630CDDA, TJA1051T-3, TLV76733DRVR, W25Q128JVS and DRV8251DDAR. By type, the board carries 25 capacitors, 10 resistors, 9 connectors, 6 ICs, 2 diodes and 2 inductors.

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

From the project

A platform designed to convert any brushed DC Motor to a smart continous servo

Little Boy with externally mounted encoder - supports many SPI absolute encoder.

Main components on the DCServo

STM32G0B1CBT6LMR33630CDDATJA1051T-3TLV76733DRVRW25Q128JVSDRV8251DDAR

DCServo bill of materials (BOM)

57 components, 40 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
STM32G0B1CBT6
STM32G0B1CBTx
U1
1
LMR33630CDDA
U2
1
TJA1051T-3
U3
1
TLV76733DRVR
TLV76733DRVx
U4
1
W25Q128JVS
U6
1
DRV8251DDAR
U7
1
NX3225SA-25.000MHZ-STD-CSR-1
25 MHz
Y1
2
Conn_01x01
J3, J6
1
CONN_01X06_MOUNTINGPIN
Conn_01x06_MountingPin
J5
2
Power_In
J8, J9
1
MOT_B
J10
1
MOT_A
J11
2
Control_In
J13, J14
1
ACT1210D-101-2P-TL00
FL1
1
Termination Jumper
JP1
2
LED
D1, D2
1
744765127GA
27nH
L1
1
1.5 uH
L2
2
VJ0402A100KXAPW1BC
TBC
C1, C3
7
C0402C104K3PACTU
100nF
C2, C5, C6, C9, C10, C17, C25
Show 20 more
QtyPartRefs
1
04023D105KAT2A
1uF
C4
1
04026D475MAT2A
4.7uF
C7
1
100uF, 80V
C8
2
C2012X5R1H106K125AC
10uF, 50V
C11, C14
1
0402X7R104KT7AT
100nF, X7R
C12
1
04025C104JAT2A
100nF, 50V
C13
1
MAASU21GSB7224KTCA01
220nF, 50V
C15
1
C0805C105J4RAC7210
1uF, 16V, X7R
C16
1
0402X7R104KT7AT
100nF, 16V
C18
2
CM105X5R226M16AT
22uF, 16V
C19, C20
1
08055C105JAT2A
1uF, X7R
C21
1
GRM155Z71A225KE01D
2.2uF
C22
2
C0402C101KCGACAUTO
100pF
C26, C27
2
MCS04020F1002BE100
10k
R1, R11
2
CR0402-JW-431GLF
470
R2, R3
1
ERJ-B1CFR10U
R4
2
SFR01MZPJ104
100k
R5, R12
1
ERA-3ARW243V
24k
R6
1
ERA-2ARB9530X
900
R7
1
MCS04020D1200BE000
120
R8

DCServo design files

The KiCad project lives in the Alex-C-EE/DCServo repository on GitHub; these links point at the commit this page was built from.

DCServo: common questions

What microcontroller does the DCServo use?

The DCServo is built around the STM32G0B1CBT6, from the STM32 family.

How big is the DCServo PCB?

The DCServo measures 40 × 40 mm, has 4 copper layers and is 1.600198 mm thick.

How many components are on the DCServo?

57 components, from 40 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 DCServo design files?

From the Alex-C-EE/DCServo 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 DCServo design in my own project?

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

Can I test firmware for the DCServo 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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