HardLabs

4x Mini Controller

sullyjason·interactiles·Button_Modules/Mini/4x_Mini_Controller/4x_Mini_Controller.kicad_pcb

4x Mini Controller PCB layout, top view — open source ESP32 board by sullyjason

About the 4x Mini Controller PCB

4x Mini Controller is an open source ESP32 PCB design by sullyjason, published on GitHub. It is a 2-layer board measuring 76.4 × 111.6 mm, with 26 components from 19 distinct parts.

Its main chip is the XIAO-ESP32-S3-SMD, from the ESP32 family. Other key parts include the TXS0102DCTR, SN74AHCT1G125DBVR, 8.4V 2S Charger, 8.4V 2S BMS and 5V 4A Stepdown. By type, the board carries 10 ICs, 5 test points, 4 capacitors, 2 battery holders, 2 diodes and 2 resistors.

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

From the project

Interactive LED button grids that connect two locations over MQTT — press a button in one place, see it light up in the other. ESP32 + NeoPixel switch hardware, KiCad designs, and firmware.

ESP32 controller for a string of up to 8 3×5 NeoPixel modules. Interfaces: I2C (for MCP23017 expanders), NeoPixel data line, common ground. Includes USB-C and optional battery charging.

4x Mini Controller, from the project README
From the project README

Main components on the 4x Mini Controller

TXS0102DCTRSN74AHCT1G125DBVRXIAO-ESP32-S3-SMD8.4V 2S Charger8.4V 2S BMS5V 4A Stepdown

4x Mini Controller bill of materials (BOM)

26 components, 19 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
TXS0102DCTR
IC2
1
SN74AHCT1G125DBVR
SN74.
IC3
4
~
U2, U3, U4, U5
1
XIAO-ESP32-S3-SMD
U6
1
8.4V 2S Charger
U7
1
8.4V 2S BMS
U8
1
5V 4A Stepdown
U9
2
Battery_Cell
BT2, BT3
1
Slide_Switch_SPDT
SW4
1
SCL 5V
TP3
1
SDA 5V
TP4
1
LED Data 5V
TP5
1
BAT+
TP9
1
BAT-
TP10
1
LED
D1
1
1N5817M
D6
3
1UF
1uF
Samsung Electro-Mechanics
C2, C4, C7
1
100UF
100uF
C3
2
100R
R3, R8

4x Mini Controller design files

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

4x Mini Controller: common questions

What microcontroller does the 4x Mini Controller use?

The 4x Mini Controller is built around the XIAO-ESP32-S3-SMD, from the ESP32 family.

How big is the 4x Mini Controller PCB?

The 4x Mini Controller measures 76.4 × 111.6 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the 4x Mini Controller?

26 components, from 19 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 4x Mini Controller design files?

From the sullyjason/interactiles 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 4x Mini Controller design in my own project?

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

Can I test firmware for the 4x Mini Controller 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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