TinyRotaryPCB

A tiny PCB (with 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).

💡 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 🇪🇺

Other useful plugins for KiCad :

• AISLER Push for KiCad : https://github.com/aislerhq
• Interactive HTML BOM : https://github.com/openscopeproject/InteractiveHtmlBom
• Board2Pdf : https://gitlab.com/dennevi/Board2Pdf
• Solarized Dark Theme : https://github.com/pointhi/kicad-color-schemes

The shell script to easily generate panels… 😆 Also in kicad folder.

#!/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"

# Framing parameters
FRAME_TYPE="railstb"
FRAME_WIDTH="2mm"
FRAME_SPACE="2mm"

# Text parameters
TEXT_HEIGHT="0.8mm"
TEXT_VOFFSET_POS="1mm"
TEXT_VOFFSET_NEG="-1mm"
TEXT_JUSTIFY="hjustify: center; vjustify: center;"
POST_MILLRADIUS="1mm"

# Ensure output directory exist
mkdir -p "${OUTPUT_DIR}"

# Kikit command with all parameters
kikit panelize \
    --layout "grid; rows: ${LAYOUT_ROWS}; cols: ${LAYOUT_COLS}; space: ${LAYOUT_SPACE}" \
    --tabs "${TAB_TYPE}; hwidth: ${TAB_HWIDTH}; vwidth: ${TAB_VWIDTH}; vcount: ${TAB_VCOUNT}" \
    --cuts "${CUTS}" \
    --framing "${FRAME_TYPE}; width: ${FRAME_WIDTH}; space: ${FRAME_SPACE};" \
    --text "simple; text: {boardTitle} {boardRevision} ${LAYOUT_COLS}x${LAYOUT_ROWS}; anchor: mt; voffset: ${TEXT_VOFFSET_POS}; height: ${TEXT_HEIGHT}; ${TEXT_JUSTIFY}" \
    --text2 "simple; text: Created on {boardDate}; anchor: mb; voffset: ${TEXT_VOFFSET_NEG}; height: ${TEXT_HEIGHT}; ${TEXT_JUSTIFY}" \
    --post "millradius: ${POST_MILLRADIUS}" \
    "${INPUT_FILE}" "${OUTPUT_FILE}"

# Check if the command succeeded
if [ $? -eq 0 ]; then
    echo "Panelization successful : ${OUTPUT_FILE}"
else
    echo "Error : Panelization failed"
    exit 1
fi

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

TODO :

• Add PDF file for the panelization to check dimensions, rotary encoder pads
• Add a screenshot from the logic analyser Sigrok with CLK/DT and switch signals
• Add link to the Elektor Ebook "Logic Analyzers in Practice" from Jörg Rippel 👍

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

Note

Big thanks to the KiCad and plugins communities. ❤️

Happy soldering & have fun ! 🥳