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2 layers44 × 11 mmSquatterboard2, the printed circuit board in 3D

This is an update to the squatterboard project, meant to resolve issues I have with the original. If you're not familiar with the original, the reason I made this was to make a daughterboard with a "squatter" profile…

Size
44 × 11 mm
Copper layers
2
Thickness
1.6 mm
Parts
11
Nets
12
Pads
62
Tracks, vias
74, 11
Pours
3
Routed
Yes
KiCad
KiCad 6 (file 20211014)
Created
25 Mar 2022
Updated
16 Sep 2022

Overview

Squatterboard2 is an open-source printed circuit board by Croktopus, from the Croktopus/squatterboard2 repository on GitHub, published under the MIT licence. It is a 2-layer board of 44 × 11 mm with 11 parts on 12 nets, routed with 74 tracks and 11 vias.

It is built around the SRV05-4. Its parts include 3 resistors, 2 connectors, 1 capacitor, 1 IC and 1 fuse.

Main components

1

README

README.md

squatterboard2

thumb

This is an update to the squatterboard project, meant to resolve issues I have with the original. If you're not familiar with the original, the reason I made this was to make a daughterboard with a "squatter" profile than the standard set by the Unified Daughterboard (UDB), since I almost never have room in my cases for a daughterboard with those dimensions.

Electrically, it is compatible with the UDB's pinout, so it can work with any PCB compatible with the UDB. I honestly do not know how it compares for effectiveness because I don't have access to proper testing equipment, and I do know that the routing is not perfectly optimal (I made a couple slight compromises to fit everything a bit tighter and, I'll be honest, to keep the routing clean), but I'm confident that it is good enough (Cunningham's Law inc).

While you are welcome to use this DB as is without any modification, I am not proposing it as an alternative standard, and I encourage you to modify it to fit your needs, because that's why it was made in the first place; as a modification of the UDB concept to fit my needs.

Major changes from the original squatterboard:

  • Built from scratch in KiCad 6
  • Simplified the schematic & componentry
  • Made it a bit squatter (loses physical compatibility, but I kinda just don't care about that, as I said above you can modify it to fit your needs, including moving some stuff around to restore physical compat)
  • Reorganized libraries, added license, basically just trying to make the whole package a bit more portable so you don't get hit with errors when you download it and try to play around with it - let me know if I failed on that front, this was one of the big reasons I had for redoing this whole thing

Major changes relative to the UDB

  • Size and shape (obviously)
  • Optimized for JLC assembly with basic parts wherever possible (production files are included, though they haven't been tested as of writing)
  • 2 M3 screws instead of 4 M2

Parts

11
QtyValueFootprintReferences
25.1kCrokto:R_0603_1608MetricR1, R2
1100nCapacitor_SMD:C_1206_3216MetricC1
11MResistor_SMD:R_1206_3216MetricR3
1500mAFuse:Fuse_1206_3216MetricF1
1Conn_01x04Crokto:JST_SH_SM04B-SRSS-TB-HandsolderingJ2
1JLCJLCJLCJLCCrokto:JLCJLCJLCJLCH3
1M3Crokto:M3_Via_Hole_NCH1
1M3_PadCrokto:M3_Via_HoleH2
1SRV05-4Package_TO_SOT_SMD:SOT-23-6U1
1USB_C_Receptacle_USB2.0Crokto:USB_C_Receptacle_HRO_TYPE-C-31-M-12J1

Questions

How big is the Squatterboard2 PCB?

It measures 44 × 11 mm and has 2 copper layers, 1.6 mm thick.

What parts does the Squatterboard2 use?

11 parts, built around the SRV05-4. 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 Squatterboard2 KiCad files?

From the Croktopus/squatterboard2 repository on GitHub, at the commit this page was made from: the board is squatterboard2/squatterboard2.kicad_pcb and its schematic madcatdb/madcatdb.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Squatterboard2 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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