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2 layers76.4 × 111.6 mm4x Mini Controller, the printed circuit board in 3D

4x Mini Controller

sullyjason/interactiles1

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.

Size
76.4 × 111.6 mm
Copper layers
2
Thickness
1.6 mm
Parts
31
Nets
35
Pads
121
Tracks, vias
255, 94
Pours
5
Routed
Yes
KiCad
KiCad 10.0 (file 20260206)
Created
8 Jul 2024
Updated
4 Oct 2026

Overview

4x Mini Controller is an open-source printed circuit board by sullyjason, from the sullyjason/interactiles repository on GitHub. It is a 2-layer board of 76.4 × 111.6 mm with 31 parts on 35 nets, routed with 255 tracks and 94 vias.

It is built around the TXS0102DCTR. Its parts include 10 ICs, 4 capacitors, 2 resistors, 2 diodes and 1 switch. It belongs with the lEDs and displays and home automation and IoT boards and the ESP32 boards of this library.

Main components

1

README

Button_Modules/Mini/Mini_Module/README.md

Mini Module PCB

3×5 grid of TL1 NeoPixel switches (7.5mm² each). 4-layer board with MCP23017 I/O expander mounted directly on the underside. Pinout is non-obvious due to space constraints — refer to schematic.

Board

Board

Bodges

Parts

31
QtyValueFootprintReferences
5SolderJumper_2_OpenJumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mmJP1, JP2, JP5, JP6, JP7
4~SilvansFootprintLibrary:Mini_ModuleU2, U3, U4, U5
31uFPCM_JLCPCB:C_0402C2, C4, C7
2100RResistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolderR3, R8
2Battery_CellSilvansFootprintLibrary:BHC-CR123ABT2, BT3
1100uFPCM_SparkFun-Capacitor:C_1206_3216MetricC3
11N5817MPCM_Diode_SMD_AKL:D_SOD-323_BigPadsD6
15V 4A StepdownSilvansFootprintLibrary:CEDAR_5V_4A_Buck_ConverterU9
18.4V 2S BMSSilvansFootprintLibrary:8.4V_2S_BMSU8
18.4V 2S ChargerSilvansFootprintLibrary:2S_Li_Ion_ChargerU7
1BAT+TestPoint:TestPoint_THTPad_D1.5mm_Drill0.7mmTP9
1BAT-TestPoint:TestPoint_THTPad_D1.5mm_Drill0.7mmTP10
1LEDLED_SMD:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolderD1
1LED Data 5VTestPoint:TestPoint_THTPad_D1.5mm_Drill0.7mmTP5
1SCL 5VTestPoint:TestPoint_THTPad_D1.5mm_Drill0.7mmTP3
1SDA 5VTestPoint:TestPoint_THTPad_D1.5mm_Drill0.7mmTP4
1SN74.SilvansFootprintLibrary:SN74AHCT1G125DBVRIC3
1Slide_Switch_SPDTButton_Switch_SMD:SW_SPDT_PCM12SW4
1TXS0102DCTRSilvansFootprintLibrary:TXS0102DCTRIC2
1XIAO-ESP32-S3-SMDSeeed_XIAO_Series:XIAO-ESP32-S3-DIPU6

Questions

How big is the 4x Mini Controller PCB?

It measures 76.4 × 111.6 mm and has 2 copper layers, 1.6 mm thick.

What parts does the 4x Mini Controller use?

31 parts, built around the TXS0102DCTR. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.

Where can I download the 4x Mini Controller KiCad files?

From the sullyjason/interactiles repository on GitHub, at the commit this page was made from: the board is Button_Modules/Mini/4x_Mini_Controller/4x_Mini_Controller.kicad_pcb and its schematic 2x2 Interactiles/PCB/Controller PCB/RGB 2x2 with WS2811.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the 4x Mini Controller design in my own project?

Its repository states no licence, so its author keeps all rights: ask sullyjason before reusing the design.

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