TinyRotaryPCB

TinyRotaryPCB

A tiny PCB (with surface resistors) for the BOURNS PEC11R rotary encoder.

Printed Circuit Board (PCB) :

As part of an educational project, the schematic and PCB are made with KiCad version 9 (kicad folder).

:bulb: All important parameters are stored in the schematic/PCB editors text variables (common project variables).

The TinyRotaryPCB itself with the rotary encoder (in reverse side for panel mount), dimensions (mm) :

The panelization option (2x2 boards with stencil) was generated with the KiCad plugin KiKit, dimensions (mm) in kicad/panel folder :

Thanks to AISLER PCB manufacturer :eu:

Get a unique 10€ coupon code in your first order in AISLER with my referral code : MakeInEurope-ECYPW :heart:

The shell script to easily generate panels (in kicad folder)… :laughing:

#!/bin/bash
# TinyRotaryPCB with KiCad and KiKit plugin for PCB panelization
# GitHub project : https://github.com/Mick3DIY/TinyRotaryPCB
# KiCad documentation : https://www.kicad.org
# KiKit plugin documentation : https://github.com/yaqwsx/KiKit

# Input and output files
INPUT_FILE="TinyRotaryPCB.kicad_pcb"
OUTPUT_DIR="panel"
OUTPUT_FILE="${OUTPUT_DIR}/TinyRotaryPCB_panel.kicad_pcb"

# Layout parameters, by default 2x2 -> panelize.sh <rows> <cols> parameters
LAYOUT_ROWS="${1:-2}"
LAYOUT_COLS="${2:-2}"
LAYOUT_SPACE="2mm"

# Tab parameters
TAB_TYPE="fixed"
TAB_HWIDTH="2mm"
TAB_VWIDTH="2mm"
TAB_VCOUNT="2"

# Cuts parameters
CUTS="mousebites; drill: 0.5mm; spacing: 0.75mm; offset: -0.3mm; prolong: 0.5mm"

More panelization examples in KiKit plugin documentation : https://yaqwsx.github.io/KiKit/latest/panelization/examples/

Logic analyser with the rotary encoder :

To understand how a rotary encoder "pulses" works, it is useful to visualise it with a software/hardware logic analysers.

Here an example with the same schematic (pins A, B, SW) in Sigrok and PulseView softwares :

TODO :

• Add PDF files for the schematic, PCBs (single, panelization)
• Add a screenshot from the logic analyser Sigrok
• Add link to the Elektor Ebook "Logic Analyzers in Practice" from Jörg Rippel
• Add more files and examples, any ideas ? :laughing:

Documentation :

BOURNS PEC11R Series 12 mm incremental rotary encoder (PEC11R-4220F-S0024) :

• https://www.bourns.com/resources/rohs/encoders/contacting-encoders
• https://www.bourns.com/docs/product-datasheets/pec11r.pdf

Sigrok, PulseView softwares, all cross-platform : https://sigrok.org :clap:

Elektor Ebook "Logic Analyzers in Practice" from Jörg Rippel :

• https://www.elektor.fr/products/logic-analyzers-in-practice-e-book :ok_hand:

[!NOTE] Big thanks to the open-source, KiCad, KiKit and plugins communities. :heart:

Happy soldering & have fun ! :partying_face: