2 layers90.5 × 56 mm Ledcontroller, the printed circuit board in 3D

Ledcontroller

LED chain + LED PWM output controller with 2 analog inputs, Omega2S SoC, Ethernet

Size: 90.5 × 56 mm
Copper layers: 2
Thickness: 1.6 mm
Parts: 59
Nets: 86
Pads: 263
Tracks, vias: 740, 53
Pours: 3
Routed: Yes
KiCad: KiCad 4
Created: 8 Sep 2018
Updated: 8 Sep 2018

Overview

Ledcontroller is an open-source printed circuit board by plan44, from the plan44/ledcontroller-hardware repository on GitHub, published under the CC-BY-SA-4.0 licence. It is a 2-layer board of 90.5 × 56 mm with 59 parts on 86 nets, routed with 740 tracks and 53 vias.

It is built around the 74AHCT125D, MCP3002-I/P and IRLR2905PBF. Its parts include 16 capacitors, 15 resistors, 13 connectors, 5 ICs and 4 diodes.

Main components

README

README.md

LED controller + Connector

This repository contains KiCAD schematics and layouts for two PCBs:

The LED controller was built to integrate:

5V data outputs up to 3 WS281x individually addressable LED chains
one PWM power output for dimming up to 80W of up to 24V LED strips
two analog inputs (0..3.3V) for external sensors
Ethernet connectivity

The connector board was designed to easily connect 7 60LED/m WS2813 LED strips to form LED display modules of 7x72 pixels each. The same board can be used on both ends of the display module, it just needs to be flipped at the far end.

The controller is based on onion.io's Omega2S MT7688 MIPS SoC module. It is meant to run OpenWrt, and there is a custom build based on OpenWrt 18.06 available which includes the p44-ledchain kernel module, a small webserver and a daemon app to create scrolling texts and other effects with the LED matrix.

-- First test with RGB LED matrix and single color 80W LED strip PWM dimmer:

LED connector close up

-- short video showing scrolling text tests with multiple controllers and 7*72 LED matrix modules

-- LED Connector close up:

LED connector close up

Parts

Qty	Value	Footprint	References
9	100nF	Capacitors_SMD:C_1206_HandSoldering	C1, C2, C3, C6, C10, C11, C12, C14, C17
6	CONN_01X02	plan44:CONFIG-PAD-2P	P2, P3, P4, P5, P6, P7
4	49.9_1%	Resistors_SMD:R_0805_HandSoldering	R5, R6, R7, R8
4	CONN_01X01	Mounting_Holes:MountingHole_3.2mm_M3_DIN965_Pad	MH1, MH2, MH3, MH4
3	100k	Resistors_SMD:R_1206_HandSoldering	R13, R14, R15
3	DO-214AA	Diodes_SMD:D_SMB_Handsoldering	D2, D3, D4
2	10k	Resistors_SMD:R_1206_HandSoldering	R9, R12
2	10uF 50VDC	Capacitors_ThroughHole:CP_Radial_D7.5mm_P2.50mm	C4, C13
2	1k	Resistors_SMD:R_1206_HandSoldering	R10, R11
2	22uF 25V	Capacitors_ThroughHole:CP_Radial_D7.5mm_P2.50mm	C7, C15
2	47R	Resistors_SMD:R_1206_HandSoldering	R3, R4
2	STELVIO-2P-508	plan44:STELVIO-2P-508	J3, J4
1	10uF	Capacitors_ThroughHole:CP_Radial_D7.5mm_P2.50mm	C16
1	1k2	Resistors_SMD:R_1206_HandSoldering	R2
1	1nF/2kV	Capacitors_SMD:C_1206_HandSoldering	C9
1	1uF	Capacitors_SMD:C_1206_HandSoldering	C8
1	470	Resistors_SMD:R_1206_HandSoldering	R1
1	74AHCT125	SMD_Packages:SOIC-14_N	U4
1	Everlight 339-1SURSYGW/S530-A3	LEDs:LED_D5.0mm-3	D1
1	FDI_Cable	Pin_Headers:Pin_Header_Straight_1x06_Pitch2.54mm	P1
1	IRLR2905PBF	TO_SOT_Packages_SMD:TO-252-2	Q1
1	MCP3002	SMD_Packages:SOIC-8-N	U5
1	ONION-OMEGA2S	plan44:ONION-OMEGA2S	U1
1	Omron PB	Buttons_Switches_ThroughHole:SW_PUSH_6mm_h4.3mm	SW1
1	Pulse-J0026D21B	plan44:PULSE-J0026D21B	J2
1	Recom_R783.3-0.5	plan44:Recom-R78Cxx	U3
1	Recom_R785.0-0.5	plan44:Recom-R78Cxx	U2
1	STELVIO-4P-508	plan44:STELVIO-4P-508	J6
1	STELVIO-5P-508	plan44:STELVIO-5P-508	J5
1	USB_A	Connect:USB_A	J1

Questions

How big is the Ledcontroller PCB?

It measures 90.5 × 56 mm and has 2 copper layers, 1.6 mm thick.

What parts does the Ledcontroller use?

59 parts, built around the 74AHCT125D, MCP3002-I/P and IRLR2905PBF. 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 Ledcontroller KiCad files?

From the plan44/ledcontroller-hardware repository on GitHub, at the commit this page was made from: the board is controller/ledcontroller.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.

Can I use the Ledcontroller design in my own project?

Its repository publishes it under the CC-BY-SA-4.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).

Project files

Show this board on your page

A live frame, for any web page

<iframe src="https://pcbkit.io/embed/boards/plan44-ledcontroller-hardware-ledcontroller" title="Ledcontroller in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe>

A picture

<img src="https://pcbkit.io/embed/boards/plan44-ledcontroller-hardware-ledcontroller.jpg" alt="Ledcontroller" width="1200" height="900">

A picture that opens the board, for a README

[![Ledcontroller](https://pcbkit.io/embed/boards/plan44-ledcontroller-hardware-ledcontroller.jpg?size=s)](https://pcbkit.io/boards/plan44-ledcontroller-hardware-ledcontroller)

Source

Repository: plan44/ledcontroller-hardware
Board file: controller/ledcontroller.kicad_pcb
Commit: c7c8cb1
Licence: CC-BY-SA-4.0

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