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CBC

Arrow-air·project-caribou·engineering/electronics/pcbs/CBC_PCB/kicad/CBC_PCB.kicad_pcb

CBC PCB layout, top view — open source ESP32 board by Arrow-air
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About the CBC PCB

CBC is an open source ESP32 PCB design by Arrow-air, published on GitHub. It is a 6-layer board measuring 178 × 211 mm, with 301 components from 117 distinct parts.

Its main chip is the 2.4GHZ, from the ESP32 family. Other key parts include the 74LVC2G02HK3-7, 74LVC1G17W5-7, CPC1106NTR, MP9486GN-Z and ICPL-314P-500EAXW. By type, the board carries 105 capacitors, 83 resistors, 35 diodes, 31 ICs, 13 transistors and 7 LEDs.

It belongs with the iot & wireless and power & battery designs in this gallery.

From the project

Project Caribou documentation, designs, and project artifacts.

The Caribou Battery Connector PCB (CBC) interfaces 18S smart battery packs with the Caribou hexacopter electrical system. Each motor arm carries one CBC board connected to one battery, providing power switching, protection, voltage regulation, and dual CAN bus communication.

- GitHub issue: #6 — Design BC-PCB for Caribou: 18S, 100A nominal, 200A spike - Starting point: Project Quiver BC-PCB KiCad design. - EDA Tool: KiCad 10 - Initial layout import: KiCad source is in kicad/; import notes are in docs/import-2026-05-19-cbc-layout.md.

CBC, from the project README
From the project README

Main components on the CBC

74LVC2G02HK3-774LVC1G17W5-7CPC1106NTRMP9486GN-ZICPL-314P-500EAXWBSMTSOM330BTR2.4GHZC47742C185941TJA1049T/3JADM3053BRWZ-REEL7C971901UFC117158120PF10mΩMAX40203AUK+T1UHC580284C6186

CBC bill of materials (BOM)

301 components, 117 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
74LVC2G02HK3-7
DIODES(美台)
U201
1
74LVC1G17W5-7
DIODES(美台)
U202
1
CPC1106NTR
Littelfuse/IXYS
U203
4
MP9486GN-Z
U204, U205, U601, U602
2
ICPL-314P-500EAXW
ISOMICRON(安芯微半导体)
U206, U207
2
BSMTSOM330BTR
U208, U209
1
2.4GHZ
2.4GHz
ESPRESSIF(乐鑫)
U301
1
C47742
~
SKYWORKS/SILICON LABS(芯科)
U302
2
C185941
~
MICROCHIP(美国微芯)
U401, U402
1
TJA1049T/3J
NXP
U403
1
ADM3053BRWZ-REEL7
ADI(亚德诺)
U404
2
C97190
~
ADI(亚德诺)/MAXIM(美信)
U501, U502
1
1UF
1uF
YAGEO(国巨)
U603
1
C117158
~
ADI(亚德诺)
U604
1
120PF
120pF
muRata(村田)
U605
1
10mΩ
yezhan(业展)
U606
4
MAX40203AUK+T
Analog Devices Inc./Maxim Integrated
U607, U608, U613, U614
1
1UH
1uH
Coilcraft(线艺)
U609
1
C580284
~
ADI(亚德诺)
U610
2
C6186
~
AMS
U611, U612
Show 97 more
QtyPartRefs
7
C22385354
~
Siliup(矽普)
Q201, Q205, Q206, Q207, Q208, Q209, Q210
2
LMUN5235T1G
LRC(乐山无线电)
Q202, Q203
1
SP015N03BGHTO
Siliup(矽普)
Q204
1
C62892
~
CJ(江苏长电/长晶)
Q301
1
C501501
~
Infineon(英飞凌)
Q601
1
C501500
~
Infineon(英飞凌)
Q602
2
16MHZ
16MHz
NDK
X401, X402
1
C225118
~
CJT(长江连接器)
CN201
4
AMT0650009DB0000G
J201, J202, J203, J204
1
B08B-JWPF-SK-R
J501
2
0154005.DR
Littelfuse(美国力特)
F201, F603
4
C206908
~
Littelfuse(美国力特)
F202, F203, F601, F602
2
C492401
~
XFCN(兴飞)
H401, H402
2
C90D_PAD
HC201, HC202
1
C720477
~
XUNPU(讯普)
SW301
1
C720628
~
XUNPU(讯普)
USB301
7
C12624
~
KENTO
LED201, LED202, LED203, LED301, LED601, LED602, LED603
2
C2128
~
CJ(江苏长电/长晶)
D201, D202
2
SMBJ78CA
GOODWORK(固得沃克)
D203, D217
8
C19077568
~
R+O(宏嘉诚)
D204, D205, D208, D209, D210, D211, D214, D219
2
C47779
~
MDD(辰达半导体)
D206, D207
4
C83323
~
Littelfuse(美国力特)
D212, D213, D606, D607
2
SS34
D215, D218
1
FSV10150V
onsemi(安森美)
D216
1
C7420316
~
R+O(宏嘉诚)
D301
1
C7519
~
ST(意法半导体)
D302
2
PESD0603-240
LITTELFUSE
D401, D403
1
C152727
~
Nexperia(安世)
D402
1
C14486
~
onsemi(安森美)
D404
2
C47124
~
MDD(辰达半导体)
D601, D602
1
C135108
~
DIODES(美台)
D603
1
C5354735
~
Central(中环)
D604
2
C260853
~
DIODES(美台)
D605, D608
1
C151789
~
MCC(美微科)
D609
1
C284082
~
DOWO(东沃)
D610
2
33UH
33uH
SXN(顺翔诺)
L201, L202
1
C48928226
~
MetalLions(美铼)
L401
1
22UH
22uH
Coilcraft(线艺)
L601
2
33UH
33uH
SXN(顺翔诺)
L602, L603
1
20.5UH
20.5uH
PULSE(普思)
L604
1
100UF
100uF
KEMET(基美)
C201
2
1UF
1uF
YAGEO(国巨)
C202, C632
10
10UF
10uF
muRata(村田)
C203, C204, C302, C305, C307, C407, C408, C414 +2
10
2.2UF
2.2uF
PSA(信昌电陶)
C205, C206, C207, C208, C601, C602, C603, C604 +2
23
100NF
100nF
SAMSUNG(三星)
C209, C210, C211, C212, C213, C214, C215, C216 +15
19
4.7UF
4.7uF
SAMSUNG(三星)
C217, C218, C219, C220, C221, C222, C225, C226 +11
1
1UF
1uF
Chinocera(华瓷)
C303
7
100NF
100nF
YAGEO(国巨)
C304, C306, C409, C410, C421, C501, C502
4
22PF
22pF
YAGEO(国巨)
C401, C402, C403, C404
2
CC0805KRX7R9BB104
100nF
Yageo
C411, C415
1
100PF
100pF
KEMET(基美)
C417
4
220PF
220pF
muRata(村田)
C418, C419, C422, C423
1
47UF
47uF
FOLLON(富隆电子)
C609
1
470PF
470pF
YAGEO(国巨)
C610
5
4.7UF
4.7uF
muRata(村田)
C611, C612, C614, C624, C645
1
33NF
33nF
YAGEO(国巨)
C613
1
220NF
220nF
SAMSUNG(三星)
C615
1
47PF
47pF
SAMSUNG(三星)
C625
1
4.7NF
4.7nF
YAGEO(国巨)
C628
6
47UF
47uF
muRata(村田)
C629, C630, C631, C633, C638, C641
4
10UF
10uF
Kyocera AVX
C636, C637, C642, C643
13
10kΩ
YAGEO(国巨)
R201, R207, R212, R217, R223, R226, R227, R235 +5
1
15kΩ
YAGEO(国巨)
R202
1
120kΩ
YAGEO(国巨)
R203
1
36kΩ
YAGEO(国巨)
R204
1
10kΩ
YAGEO(国巨)
R205
1
330Ω
YAGEO(国巨)
R206
2
10Ω
UNI-ROYAL(厚声)
R208, R209
7
100Ω
UNI-ROYAL(厚声)
R210, R214, R218, R225, R228, R236, R240
2
0
YAGEO(国巨)
R211, R213
2
300
YAGEO(国巨)
R215, R216
2
590K, 0603
UNI-ROYAL(厚声)
R219, R221
8
10kΩ
YAGEO(国巨)
R220, R222, R232, R234, R605, R607, R614, R616
1
20
YAGEO(国巨)
R224
2
33Ω
VISHAY(威世)
R229, R230
4
140kΩ
RESI(开步睿思)
R231, R233, R613, R615
4
1.8kΩ
UNI-ROYAL(厚声)
R238, R239, R241, R625
1
39Ω
UNI-ROYAL(厚声)
R302
2
5.1kΩ
UNI-ROYAL(厚声)
R303, R304
1
RC0805FR-070RL
0R
Yageo
R403
1
RC0805FR-0710KL
10K
Yageo
R404
2
120Ω
UNI-ROYAL(厚声)
R405, R408
1
1MΩ
YAGEO(国巨)
R406
2
0Ω
YAGEO(国巨)
R407, R611
2
4.7kΩ
YAGEO(国巨)
R501, R502
1
6.04kΩ
UNI-ROYAL(厚声)
R601
1
60.4kΩ
UNI-ROYAL(厚声)
R602
1
7.5kΩ
FOJAN(富捷)
R603
2
240kΩ
YAGEO(国巨)
R604, R606
1
1.2MΩ
FOJAN(富捷)
R608
1
51kΩ
RESI(开步睿思)
R609
1
160kΩ
UNI-ROYAL(厚声)
R610
1
68Ω
PANASONIC(松下)
R612
2
3Ω
UNI-ROYAL(厚声)
R617, R623
5
100Ω
RESI(开步睿思)
R618, R619, R621, R626, R627
2
390Ω
UNI-ROYAL(厚声)
R620, R622
1
2.37kΩ
FOJAN(富捷)
R624

CBC design files

The KiCad project lives in the Arrow-air/project-caribou repository on GitHub; these links point at the commit this page was built from.

CBC: common questions

What microcontroller does the CBC use?

The CBC is built around the 2.4GHZ, from the ESP32 family.

How big is the CBC PCB?

The CBC measures 178 × 211 mm, has 6 copper layers and is 1.6 mm thick.

How many components are on the CBC?

301 components, from 117 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 CBC design files?

From the Arrow-air/project-caribou 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 CBC design in my own project?

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

Can I test firmware for the CBC without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.

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