2 layers83.3 × 65.3 mm
SimonShield
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46 parts14kMIT
2 layers
Example project
ignamv/kicad_scripts24Utility Kicad scripts
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 10
- Nets
- 6
- Pads
- 21
- Tracks, vias
- 0, 0
- Routed
- Not yet
- KiCad
- KiCad 4
- Created
- 3 Sep 2015
- Updated
- 29 Dec 2015
Overview
Example project is an open-source printed circuit board by ignamv, from the ignamv/kicad_scripts repository on GitHub, published under the GPL-2.0 licence. It is a 2-layer board with 10 parts on 6 nets.
It is built around the BC547. Its parts include 4 resistors, 3 connectors, 2 capacitors and 1 transistor.
Main components
1README
README.mdkicad_scripts
Utility Kicad scripts
spiral_inductor.py - PCB Spiral Inductor tool
Making RFID readers and tags requires designing antenna inductors. This tool simplifies the process by allowing you to quickly analyze PCB spiral inductors with FastHenry to find inductance and Q. Once you're satisfied with a design, you can save a Kicad footprint to incorporate into your PCB layout.
Instructions
You can use it online at http://ignamv2.linkpc.net/spiral/
For local use, download the folder rfid_calculator and run cmdline.py. Example:
$ python3 cmdline.py --help
usage: cmdline.py [-h] --width WIDTH --height HEIGHT --trace_width TRACE_WIDTH
[--mirror] --turns TURNS
(--pitch PITCH | --separation SEPARATION) [--zpitch ZPITCH]
[--frequency FREQUENCY]
[--thickness THICKNESS | --weight WEIGHT] [--fasthenry]
[--kicad_mod KICAD_MOD] [--pad_size PAD_SIZE]
(--mm | --cm | --mil | --in) [--square | --ellipse]
[--vertices_per_turn VERTICES_PER_TURN]
Calculate PCB spiral inductor with FastHenry and produce Kicad footprint
optional arguments:
-h, --help show this help message and exit
--width WIDTH Total outside width
--height HEIGHT Total outside height
--trace_width TRACE_WIDTH
Trace width
--mirror Reflect footprint horizontally
--turns TURNS Number of turns
--pitch PITCH Trace pitch (width + separation)
--separation SEPARATION
Separation between traces
--zpitch ZPITCH Vertical pitch (default 0 for planar inductor)place_footprints.py
When you first start pcbnew and read a netlist, all components are piled up in one place. This script takes the schematic and pcb files and moves the footprints to match their placement in the schematic. This is a nicer starting point to route your PCB.
Instructions
You need to have python 2 installed. First, finish the schematic:
Then export the netlist for pcbnew, and run cvpcb to associate a footprint to each component. Launch pcbnew and load the netlist and footprint association, then save. These are standard steps when making PCBs with Kicad, you can check out Contextual Electronics for more detailed instructions.
My script takes the pcb file you just saved and moves the footprints to match the schematic. You need to download the script to your project directory. To run it, just drag the project file (.pro) or project folder into the script icon. Your pcb file now has placed components.
Here's the output from the schematic above:
If you want to see detailed script output (for troubleshooting), open a terminal (in Windows, use Start -> Run -> cmd.exe) and go to your project directory
$ cd %USERPROFILE%\My Documents\example_project
$ python place_footprints.py .
Found project ./example_project
Found schematic: ././example_project.sch
Found pcb: ././example_project.kicad_pcb
13:06:04: Debug: Skipping general section token 'links'
13:06:04: Debug: Skipping general section token 'area'
13:06:04: Debug: Skipping general section token 'drawings'
13:06:04: Debug: Skipping general section token 'tracks'
13:06:04: Debug: Skipping general section token 'zones'
13:06:04: Debug: Skipping general section token 'symbol'
Moving module...R1 R2 Q1 R4 C2 R3 C1 P1 P3 P2
Backing up ././example_project.kicad_pcb to ././example_project.kicad_pcb.bak6Parts
10| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | CONN_01X02 | Pin_Headers:Pin_Header_Angled_1x02 | P1, P2, P3 |
| 2 | .1u | Capacitors_SMD:C_0805_HandSoldering | C1, C2 |
| 2 | 10k | Resistors_SMD:R_0805_HandSoldering | R1, R2 |
| 1 | 1k | Resistors_SMD:R_0805_HandSoldering | R4 |
| 1 | 200 | Resistors_SMD:R_0805_HandSoldering | R3 |
| 1 | BC547 | Housings_TO-92:TO-92_Inline_Narrow_Oval | Q1 |
Questions
What parts does the Example project use?
10 parts, built around the BC547. 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 Example project KiCad files?
From the ignamv/kicad_scripts repository on GitHub, at the commit this page was made from: the board is example_project/example_project.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Example project design in my own project?
Its repository publishes it under the GPL-2.0 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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