HardLabs

Devotchi

hussamkoman·devotchi·hardware/devotchi.kicad_pcb

Devotchi PCB layout, top view — open source ESP32 board by hussamkoman
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About the Devotchi PCB

Devotchi is an open source ESP32 PCB design by hussamkoman, published on GitHub under the MIT license. It is a 4-layer board measuring 45 × 50 mm, with 47 components from 28 distinct parts.

Its main chip is the ESP32-S3-MINI-1-N4R2, from the ESP32 family. Other key parts include the DW01A, TP4056-42-ESOP8, ME6211C33M5 and HS20HS072RX. By type, the board carries 16 resistors, 13 capacitors, 5 ICs, 4 switches, 3 transistors and 3 connectors.

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

From the project

Tamagotchi-style portable device for AI coding agents

See purchase-list.md for the complete BOM with LCSC part numbers and sourcing info.

Why N4R2: PSRAM needed for display framebuffers — 320x240 RGB565 = 150KB per frame, double buffering needs 300KB. Without PSRAM, internal 512KB SRAM can't fit framebuffers + WiFi stack + application.

Source: LCSC/JLCPCB C5329582 — $3.70 (1+), $2.49 (100+), 1687 in stock.

Why this part: - Full RGB color — expressive Tamagotchi character (red angry, green happy, etc.) - 320x240 resolution — excellent detail for pixel art and text - IPS viewing angle — looks good from any direction (critical for handheld) -…

Devotchi, from the project README
From the project README

Main components on the Devotchi

ESP32-S3-MINI-1-N4R2DW01ATP4056-42-ESOP8ME6211C33M5HS20HS072RX

Devotchi bill of materials (BOM)

47 components, 28 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ESP32-S3-MINI-1-N4R2
U101
1
DW01A
U201
1
TP4056-42-ESOP8
U202
1
ME6211C33M5
U203
1
HS20HS072RX
U301
1
FS8205A_C2830320
Q201
2
AO3400A
Q301, Q401
1
USB_C_RECEPTACLE_USB2.0_16P
USB_C_Receptacle_USB2.0_16P
J201
1
C7433648
Battery_conn
J202
1
C2895081
Motor
J401
1
AFC01-S12FCA-00
FPC301
1
C318884
reset_btn
SW101
1
C318884
BTN_ACTION
SW501
1
C318884
BTN_APPROVE
SW502
1
C318884
BTN_REJECT
SW504
1
C42441798
1N5819W S4_C42441798
D401
1
FC-1608G1-520
D402
1
C45783
22µ
C101
5
100N
100n
C102, C203, C501, C502, C504
5
C15849
1µ
C103, C204, C205, C301, C302
Show 8 more
QtyPartRefs
2
C15850
10µ
C201, C202
5
10K
10k
R101, R206, R501, R502, R504
4
1k
R201, R202, R302, R402
2
5K1
5k1
R203, R204
1
3k
R205
2
100K
100k
R207, R208
1
22R
R301
1
150R
R401

Devotchi design files

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

Devotchi: common questions

What microcontroller does the Devotchi use?

The Devotchi is built around the ESP32-S3-MINI-1-N4R2, from the ESP32 family.

How big is the Devotchi PCB?

The Devotchi measures 45 × 50 mm, has 4 copper layers and is 1.6062 mm thick.

How many components are on the Devotchi?

47 components, from 28 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 Devotchi design files?

From the hussamkoman/devotchi 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 Devotchi design in my own project?

Yes, under the terms of its MIT license, which hussamkoman chose for the repository.

Can I test firmware for the Devotchi 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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