2 layers

This might work

Rpo for pcb layouts, gerber and gcode files

Copper layers: 2
Thickness: 1.6 mm
Parts: 30
Nets: 75
Pads: 195
Tracks, vias: 479, 44
Routed: Yes
KiCad: KiCad 5 (file 20171130)
Created: 18 Jun 2018
Updated: 30 Aug 2022

Overview

This might work is an open-source printed circuit board by androiders, from the androiders/pcbs repository on GitHub. It is a 2-layer board with 30 parts on 75 nets, routed with 479 tracks and 44 vias.

It is built around the TPIC6595N. Its parts include 15 connectors, 12 ICs and 3 resistors.

Main components

TPIC6595N
PDIP-20-40℃~+125℃ 1 4.5V~5.5V 8 Open Drain Serial-to-Serial or Parallel TPIC PDIP-20 Shift Registers ROHSTexas InstrumentsShift Registers

README

README.md

View this project on CADLAB.io.

pcbs

Repo for pcb layouts, gerber and gcode files

Ki-Cad

PCB layout:

Use as wide traces as possible. 1mm preffered.
Dont use "filled areas" if possible. It does not make good geometry in flatcam
Don't forget to set origin marker
Export gerber: use auxiliary axis

FlatCam

geometry generation:

If you are using thru-hole components or using bottom layer, mirror around y axis for both geometry and Drilling
Edit drill files if necessary for fewer drill sizes
TODO: test double sided layout by mirroring around center axis!

Isolation generation:

Current isolation mill depth to test: 0.04 mm (0.05 was tested and seems to work fine!) (Common copper depth is about 0.03 mm)
Current feedrate on isolation milling to test: 60 mm/s
spindle speed 12000 rpm
use 0.2 mm tool width on cnc generation
2 passes with 0.1 overlap

Cutout generation:

Current cutout mill depth: 1.6 mm
Current feedrate on cutout milling: 40 mm/s
spindle speed 12000 rpm

FlatCam defaults:

put a link in ~/.FlatCAM/defaults.json

bCNC

Probe:

Fastfeed: 120
Probefeed: 25
Probe points: 4/cm (in each direction)

Drilling:

Current drill plunge rate to test 20 mm/s
spindle speed: 12000 rpm
Drill depth: 1.6

Parts

Qty	Value	Footprint	References
6	Numitron_IV-9	Display:numitron iv-9	U2, U6, U7, U9, U10, U12
6	TPIC6595	Package_DIP:DIP-20_W7.62mm_LongPads	U1, U3, U4, U5, U8, U11
3	R	Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal	R1, R2, R3
1	Pwr gnd	Connector_Pin:Pin_D1.0mm_L10.0mm	J6
1	Vcc in	Connector_Pin:Pin_D1.0mm_L10.0mm	J5
1	enable	Connector_Pin:Pin_D1.0mm_L10.0mm	J4
1	enable 2	Connector_Pin:Pin_D1.0mm_L10.0mm	J15
1	enable 3	Connector_Pin:Pin_D1.0mm_L10.0mm	J10
1	logic gnd	Connector_Pin:Pin_D1.0mm_L10.0mm	J11
1	rclk	Connector_Pin:Pin_D1.0mm_L10.0mm	J3
1	rclk 2	Connector_Pin:Pin_D1.0mm_L10.0mm	J14
1	rclk 3	Connector_Pin:Pin_D1.0mm_L10.0mm	J9
1	ser in 2	Connector_Pin:Pin_D1.0mm_L10.0mm	J12
1	ser in 3	Connector_Pin:Pin_D1.0mm_L10.0mm	J7
1	serial clk	Connector_Pin:Pin_D1.0mm_L10.0mm	J2
1	serial in	Connector_Pin:Pin_D1.0mm_L10.0mm	J1
1	srck 2	Connector_Pin:Pin_D1.0mm_L10.0mm	J13
1	srck 3	Connector_Pin:Pin_D1.0mm_L10.0mm	J8

Questions

What parts does the This might work use?

30 parts, built around the TPIC6595N. 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 This might work KiCad files?

From the androiders/pcbs repository on GitHub, at the commit this page was made from: the board is numitron clock/this might work.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.

Can I use the This might work design in my own project?

Its repository states no licence, so its author keeps all rights: ask androiders before reusing the design.

Project files

Show this board on your page

A live frame, for any web page

<iframe src="https://pcbkit.io/embed/boards/androiders-pcbs-this-might-work" title="This might work in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe>

A picture

<img src="https://pcbkit.io/embed/boards/androiders-pcbs-this-might-work.jpg" alt="This might work" width="1200" height="900">

A picture that opens the board, for a README

[![This might work](https://pcbkit.io/embed/boards/androiders-pcbs-this-might-work.jpg?size=s)](https://pcbkit.io/boards/androiders-pcbs-this-might-work)

Source

Repository: androiders/pcbs
Board file: numitron clock/this might work.kicad_pcb
Commit: 6aef352
Licence: Not stated

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