2 layers118.1 × 101.6 mm
Teensy eurorack
newdigate/teensy-eurorack
Hardware Design: Eurorack shield for teensy 4.1 with 14 in / 16 out analog channels
102 parts259MIT
2 layers134.6 × 90.8 mm
Matrix
luni64/EncoderTool58The EncoderTool is a library to manage and read out rotary encoders connected either directly or via multiplexers to ARM based boards. Encoder push buttons are supported. Callback functions can be attached to encoder changes and button presses to allow for event driven applications
- Size
- 134.6 × 90.8 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 34
- Nets
- 107
- Pads
- 599
- Tracks, vias
- 227, 0
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 11 May 2020
- Updated
- 15 Jan 2025
Overview
Matrix is an open-source printed circuit board by luni64, from the luni64/EncoderTool repository on GitHub, published under the MIT licence. It is a 2-layer board of 134.6 × 90.8 mm with 34 parts on 107 nets, routed with 227 tracks and 0 vias.
It is built around the TEENSY 4.1. Its parts include 4 connectors and 1 IC. It belongs with the lEDs and displays boards and the NXP (LPC, Kinetis, i.MX RT) boards of this library.
Main components
1README
README.mdEncoderTool 
Bounce-Free Rotary Encoder Library
+ Standard or Multiplexed Wiring
+ Push Button Support
+ Callback System
Supports
-
All common encoders with and without push buttons
-
Directly connected encoders (A+B+Button to pins)
-
Multiplexed encoders using
-
Easy to adapt for your preferred multiplexer
-
Interrupt based or polled readout strategies
Board Compatibility
-
PJRC Teensy (Teensy-LC, Teensy 3.x, Teensy 4.x, MicroMod)
-
SAMD (SEEED XIAO, Nano33 ...)
-
8bit Arduino AVR (UNO, Nano, Mega...)
-
ESP32
-
Fallback solution for other boards (using slow digitalRead/Write)
Features
-
Fully bounce free readout without additional hardware
-
Provides hard and cyclic count limits
-
Supports and debounces encoder push buttons
-
Modern callback system for event driven applications
-
Encoders can be connected directly (A / B / Btn connected to pins)
-
Encoder connection using various multiplexers (up to 32 encoders on only 4 control pins)
-
Schematics and Gerbers available for multiplexed encoder boards (Eagle/KiCad).
Parts
34| Qty | Value | Footprint | References |
|---|---|---|---|
| 15 | RotaryEncoder_Switch_Matrix | Encoder:MatrixEncoder EC11 | ENC1, ENC2, ENC3, ENC4, ENC5, ENC6, ENC7, ENC8, ENC9, ENC10, ENC11, ENC12, ENC13, ENC14, ENC15 |
| 4 | Conn_01x24 | footprints:PinHeader_1x24_P2.54mm_Vertical | J1, J2, J3, J4 |
| 1 | LOGO | Logo:logo10mm | G*** |
| 1 | Teensy4.1 | teensy:Teensy41 | U1 |
The 21 most common of 34 parts.
Questions
How big is the Matrix PCB?
It measures 134.6 × 90.8 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Matrix use?
34 parts, built around the TEENSY 4.1. 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 Matrix KiCad files?
From the luni64/EncoderTool repository on GitHub, at the commit this page was made from: the board is Resources/Extras/Boards/MATRIX/KICAD6/matrix.kicad_pcb and its schematic Resources/Extras/Boards/MATRIX/KICAD6/matrix.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Matrix design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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