Pico-sized STM32F103 dev board

An exercise to learn SMT PCB design.

Licensed CC BY-SA 4.0.

Signed-off-by: Matthias Blankertz <matthias@blankertz.org>
This commit is contained in:
2025-09-06 09:18:15 +02:00
commit 279ffc1aba
7 changed files with 39873 additions and 0 deletions

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# Created by https://www.toptal.com/developers/gitignore/api/kicad
# Edit at https://www.toptal.com/developers/gitignore?templates=kicad
### KiCad ###
# For PCBs designed using KiCad: https://www.kicad.org/
# Format documentation: https://kicad.org/help/file-formats/
# Temporary files
*.000
*.bak
*.bck
*.kicad_pcb-bak
*.kicad_sch-bak
*-backups
*.kicad_prl
*.sch-bak
*~
_autosave-*
*.tmp
*-save.pro
*-save.kicad_pcb
fp-info-cache
# Netlist files (exported from Eeschema)
*.net
# Autorouter files (exported from Pcbnew)
*.dsn
*.ses
# Exported BOM files
*.xml
*.csv
### KiCad Patch ###
rescue-backup/
*.tsv
bom/
# Gerber export output
out/
# End of https://www.toptal.com/developers/gitignore/api/kicad
production/
~*.lck

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{"ARCHIVE_NAME": "", "EXTRA_LAYERS": "", "ALL_ACTIVE_LAYERS": false, "EXTEND_EDGE_CUT": false, "ALTERNATIVE_EDGE_CUT": false, "AUTO TRANSLATE": true, "AUTO FILL": true, "EXCLUDE DNP": false}

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mini-stm-board.kicad_dru Normal file
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(version 1)
# Custom Design Rules (DRC) for KiCAD 7.0 (Stored in '<project>.kicad_dru' file).
#
# Matching JLCPCB capabilities: https://jlcpcb.com/capabilities/pcb-capabilities
#
# KiCad documentation: https://docs.kicad.org/master/id/pcbnew/pcbnew_advanced.html#custom_design_rules
#
# Inspiration
# - https://gist.github.com/darkxst/f713268e5469645425eed40115fb8b49 (with comments)
# - https://gist.github.com/denniskupec/e163d13b0a64c2044bd259f64659485e (with comments)
# TODO new rule: NPTH pads.
# Inner diameter of pad should be 0.4-0.5 mm larger than NPTH drill diameter.
# JLCPCB: "We make NPTH via dry sealing film process, if customer would like a NPTH but around with pad/copper, our engineer will dig out around pad/copper about 0.2mm-0.25mm, otherwise the metal potion will be flowed into the hole and it becomes a PTH. (there will be no copper dig out optimization for single board)."
# TODO: new rule for plated slots: min diameter/width 0.5mm
# JLCPCB: "The minimum plated slot width is 0.5mm, which is drawn with a pad."
# TODO new rule: non-plated slots: min diameter/width 1.0mm
# JLCPCB: "The minimum Non-Plated Slot Width is 1.0mm, please draw the slot outline in the mechanical layer(GML or GKO)""
(rule "Track width, outer layer (1oz copper)"
(layer outer)
(condition "A.Type == 'track'")
(constraint track_width (min 0.127mm))
)
(rule "Track spacing, outer layer (1oz copper)"
(layer outer)
(condition "A.Type == 'track' && B.Type == A.Type")
(constraint clearance (min 0.127mm))
)
(rule "Track width, inner layer"
(layer inner)
(condition "A.Type == 'track'")
(constraint track_width (min 0.09mm))
)
(rule "Track spacing, inner layer"
(layer inner)
(condition "A.Type == 'track' && B.Type == A.Type")
(constraint clearance (min 0.09mm))
)
(rule "Silkscreen text"
(layer "?.Silkscreen")
(condition "A.Type == 'Text' || A.Type == 'Text Box'")
(constraint text_thickness (min 0.15mm))
(constraint text_height (min 1mm))
)
(rule "Pad to Silkscreen"
(layer outer)
(condition "A.Type == 'pad' && B.Layer == '?.Silkscreen'")
(constraint silk_clearance (min 0.15mm))
)
(rule "Edge (routed) to track clearance"
(condition "A.Type == 'track'")
(constraint edge_clearance (min 0.3mm))
)
#(rule "Edge (v-cut) to track clearance"
# (condition "A.Type == 'track'")
# (constraint edge_clearance (min 0.4mm))
#)
# JLCPCB restrictions ambiguous:
# Illustration: 0.2 mm, 1&2 layer: 0.3 mm, multilayer: "(0.15mm more costly)"
# This rule handles diameter minimum and maximum for ALL holes.
# Other specialized rules handle restrictions (e.g. Via, PTH, NPTH)
(rule "Hole diameter"
(constraint hole_size (min 0.2mm) (max 6.3mm))
)
(rule "Hole (NPTH) diameter"
(layer outer)
(condition "!A.isPlated()")
(constraint hole_size (min 0.5mm))
)
# TODO: Hole to board edge ≥ 1 mm. Min. board size 10 × 10 mm
(rule "Hole (castellated) diameter"
(layer outer)
(condition "A.Type == 'pad' && A.Fabrication_Property == 'Castellated pad'")
(constraint hole_size (min 0.6mm))
)
# JLCPCB: "Via diameter should be 0.1mm(0.15mm preferred) larger than Via hole size" (illustration shows diameters for both dimensions)
# JLCPCB: PTH: "The annular ring size will be enlarged to 0.15mm in production."
(rule "Annular ring width (via and PTH)"
(layer outer)
(condition "A.isPlated()")
(constraint annular_width (min 0.075mm))
)
(rule "Clearance: hole to hole (perimeter), different nets"
(layer outer)
(condition "A.Net != B.Net && (A.Type != 'Via' || B.Type != 'Via')")
(constraint hole_to_hole (min 0.5mm))
)
(rule "Clearance: via to via (perimeter), different nets"
(layer outer)
(condition "A.Net != B.Net && A.Type == 'Via' && B.Type == 'Via'")
(constraint hole_to_hole (min 0.2mm))
)
(rule "Clearance: hole to hole (perimeter), same net"
(layer outer)
(condition "A.Net == B.Net")
(constraint hole_to_hole (min 0.254mm))
)
(rule "Clearance: track to NPTH hole (perimeter)"
# (condition "A.Pad_Type == 'NPTH, mechanical' && B.Type == 'track' && A.Net != B.Net")
(condition "!A.isPlated() && B.Type == 'track' && A.Net != B.Net")
(constraint hole_clearance (min 0.254mm))
)
(rule "Clearance: track to PTH hole perimeter"
(condition "A.isPlated() && B.Type == 'track' && A.Net != B.Net")
(constraint hole_clearance (min 0.33mm))
)
# TODO: try combining with rule "Clearance: PTH to track, different nets"
(rule "Clearance: track to pad"
(condition "A.Type == 'pad' && B.Type == 'track' && A.Net != B.Net")
(constraint clearance (min 0.2mm))
)
(rule "Clearance: pad/via to pad/via"
(layer outer)
# (condition "(A.Type == 'Pad' || A.Type == 'Via') && (B.Type == 'Pad' || B.Type == 'Via') && A.Net != B.Net")
(condition "A.isPlated() && B.isPlated() && A.Net != B.Net")
(constraint clearance (min 0.2mm))
)

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mini-stm-board.kicad_pcb Normal file

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mini-stm-board.kicad_prl Normal file
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{
"board": {
"active_layer": 5,
"active_layer_preset": "",
"auto_track_width": true,
"hidden_netclasses": [],
"hidden_nets": [
"GND"
],
"high_contrast_mode": 0,
"net_color_mode": 1,
"opacity": {
"images": 0.6,
"pads": 1.0,
"shapes": 1.0,
"tracks": 1.0,
"vias": 1.0,
"zones": 0.6
},
"selection_filter": {
"dimensions": false,
"footprints": true,
"graphics": false,
"keepouts": false,
"lockedItems": false,
"otherItems": false,
"pads": true,
"text": true,
"tracks": true,
"vias": true,
"zones": true
},
"visible_items": [
"vias",
"footprint_text",
"footprint_anchors",
"ratsnest",
"grid",
"footprints_front",
"footprints_back",
"footprint_values",
"footprint_references",
"tracks",
"drc_errors",
"drawing_sheet",
"bitmaps",
"pads",
"zones",
"drc_warnings",
"drc_exclusions",
"locked_item_shadows",
"conflict_shadows",
"shapes"
],
"visible_layers": "ffffffff_ffffffff_ffffffff_ffffffff",
"zone_display_mode": 0
},
"git": {
"repo_type": "",
"repo_username": "",
"ssh_key": ""
},
"meta": {
"filename": "mini-stm-board.kicad_prl",
"version": 5
},
"net_inspector_panel": {
"col_hidden": [
false,
false,
false,
false,
false,
false,
false,
false,
false,
false
],
"col_order": [
0,
1,
2,
3,
4,
5,
6,
7,
8,
9
],
"col_widths": [
0,
0,
0,
0,
0,
0,
0,
0,
0,
0
],
"custom_group_rules": [],
"expanded_rows": [],
"filter_by_net_name": true,
"filter_by_netclass": true,
"filter_text": "",
"group_by_constraint": false,
"group_by_netclass": false,
"show_unconnected_nets": false,
"show_zero_pad_nets": false,
"sort_ascending": true,
"sorting_column": 0
},
"open_jobsets": [],
"project": {
"files": []
},
"schematic": {
"selection_filter": {
"graphics": true,
"images": true,
"labels": true,
"lockedItems": false,
"otherItems": true,
"pins": true,
"symbols": true,
"text": true,
"wires": true
}
}
}

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