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Poket

kaorii-ako·Poket

Poket PCB layout, top view — open source ESP32 board by kaorii-ako
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About the Poket PCB

Poket is an open source ESP32 PCB design by kaorii-ako, published on GitHub under the MIT license. It is a 4-layer board measuring 80 × 54 mm, with 100 components from 50 distinct parts.

Its main chip is the ESP32-WROOM-32E-N16R2, from the ESP32 family. Other key parts include the MCP73831T-2ACI/OT, AP2112K-3.3TRG1, PCM5102APWR, PAM8908JER and BQ27441DRZR-G1A. By type, the board carries 36 capacitors, 36 resistors, 8 ICs, 7 switches, 6 connectors and 3 transistors.

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

From the project

ESP32-S3 Bluetooth MP3 player - custom PCB + 3D-printed case, built from scratch

A pocket Bluetooth MP3 player built around an ESP32-S3.

Plays MP3s off a microSD card and sends them either to Bluetooth headphones (A2DP source) or out a 3.5 mm jack.

Top side: ESP32-S3 module and its antenna keepout top-right, audio chain and power block under where the OLED sits, encoder centre-right, three transport buttons along the bottom, USB-C bottom-right, 3.5 mm jack top-left.

Poket, from the project README
From the project README

Main components on the Poket

ESP32-WROOM-32E-N16R2MCP73831T-2ACI/OTAP2112K-3.3TRG1PCM5102APWRPAM8908JERBQ27441DRZR-G1AUSBLC6-2SC6CP2102N-A02-GQFN24

Poket bill of materials (BOM)

100 components, 50 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ESP32-WROOM-32E-N16R2
U1
1
MCP73831T-2ACI/OT
MCP73831-2-OT
U2
1
AP2112K-3.3TRG1
AP2112K-3.3
U3
1
PCM5102APWR
PCM5102A
U4
1
PAM8908JER
PAM8908
U5
1
BQ27441DRZR-G1A
BQ27441-G1
U6
1
USBLC6-2SC6
U7
1
CP2102N-A02-GQFN24
U8
1
DMG2301L
Q1
2
MMBT3904
Q2, Q3
1
HC-TYPE-C-16P-01A
USB-C
J1
1
DM3AT-SF-PEJM5
microSD
J2
1
SJ1-3535NG
3.5mm_TRS
J3
1
OLED-SSD1306
J4
1
S2B-PH-SM4-TB
BATT-JST
J5
1
DEBUG-UART
J6
1
EC11E15244A3
EC11E-Switch
SW1
1
TS-1187A-B-A-B
PREV
SW2
1
TS-1187A-B-A-B
PLAY
SW3
1
TS-1187A-B-A-B
NEXT
SW4
Show 30 more
QtyPartRefs
1
B3U-1000P
BOOT
SW5
1
B3U-1000P
RESET
SW6
1
PCM12SMTR
PWR
SW7
1
WS2812B-2020
D1
1
KT-0603G
CHG
D2
1
B5819WS
B5819W
D3
1
600R_100MHz
FB1
6
10UF
10uF
C1, C7, C9, C13, C16, C25
7
100NF
100nF
C2, C6, C8, C10, C12, C14, C15
3
10uF
C3, C4, C5
1
1UF
1uF
C11
1
2.2UF
2.2uF
C17
7
1uF
C18, C19, C20, C21, C22, C23, C24
4
100nF
C26, C27, C28, C29
2
10NF
10nF
C30, C31
2
CL10A475KO8NNNC
4.7uF
C32, C35
3
CL10B104KB8NNNC
100nF
C33, C34, C36
2
5.1K
5.1k
R1, R2
1
2k
R3
2
1k
R4, R23
3
10K
10k
R5, R7, R8
1
1M
R6
2
4.7K
4.7k
R9, R10
15
10k
R11, R12, R13, R14, R15, R16, R17, R18 +7
1
100K
100k
R20
1
0.01R
0.01
R24
2
RC0603FR-071KL
1k
R31, R32
4
RC0603FR-0710KL
10k
R33, R36, R37, R38
1
RC0603FR-0722K1L
22.1k
R34
1
RC0603FR-0747K5L
47.5k
R35

Poket design files

The KiCad project lives in the kaorii-ako/Poket repository on GitHub; these links point at the commit this page was built from.

Poket: common questions

What microcontroller does the Poket use?

The Poket is built around the ESP32-WROOM-32E-N16R2, from the ESP32 family.

How big is the Poket PCB?

The Poket measures 80 × 54 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Poket?

100 components, from 50 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 Poket design files?

From the kaorii-ako/Poket 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 Poket design in my own project?

Yes, under the terms of its MIT license, which kaorii-ako chose for the repository.

Can I test firmware for the Poket 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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