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• 7) Combining everything into a .fzp

  Arya • 12/14/2016 at 01:23 • 0 comments

  If you want to create your very new part, here's the short way to do it:

  1. Copy a part from the stock library to "My parts" library
     1. Place the part you want to copy on breadboard/PCB/schematic
     2. While it's selected, go Part->Edit
     3. Go to File and use Save as new part
  2. Locate the part in your Documents folder
     1. It'll be in Documents/Fritzing/parts/user
     2. Throw in your svgs in parts/svgs/user
  3. In Parts editor, use the File->Load image for view to load new SVGs for the currently selected view (Breadboard/Schematic/PCB/Icon)
     1. You can also map pins to SVG elements there, though I didn't try it out myself.
     2. You can also edit pin descriptions, metadata and any XML fields
     3. Basically, Part Editor is a powerful thing.

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• 6) Simple guide - making the PCB footprint

  Arya • 12/14/2016 at 00:12 • 1 comment

  A very simple footprint. Fritzing generates those automatically, again, and this is how it looks:

  Couldn't have done it simpler.
  

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• 5) Simple guide: Making a schematic

  Arya • 12/13/2016 at 18:43 • 0 comments

  We're aiming for a simple schematic symbol - a rectangle, pins from both sides matching the physical pinout and text labels with those.

  ---

  New Inkscape document:

  Canvas dimensions:

  • Width: 1 inch
  • Height: (number of pins from one side + 1 )*0.1, for our ATtiny it's 5*0.1 = 0.5

  IC body:

  Draw a rectangle, no fill, black outline with 1px stroke width. Dimension it to 0.5x0.5in and center.

  IC pins:

  Draw a straight line, set width to 0.25 in and height to something like 0.012. Move first row of lines to X:0.0in and Y:(0.1, 0.2, 0.3, 0.4)in. Second row goes to X:0.75in and same Y.

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• 4) The simplest guide - DIP/SIP/SMD in 2 minutes!

  Arya • 12/13/2016 at 17:03 • 0 comments

  1. Open Fritzing
  2. Part window is on the right of Fritzing window, go to Core parts
  3. In "ICs" section, select the first one - with "IC" on it
  4. Inspector window is right under the Parts window (if not, go to Window->Inspector), we need the Properties section
  5. In that section, you can select your package type (DIP/SIP/various SMD options), variant, number of pins and even label your IC any way you want.
  6. Edit the pin labels.

  Everything is autogenerated. For even better effect, select the part and go Part->Edit . I didn't even need that to make an ATTiny.

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• 3) Simple guide: breadboard footprint and Inkscape crash course

  Arya • 12/13/2016 at 16:09 • 2 comments

  ATTiny85

  Measurements and preparations:

  • IC dimensions (with pins) - 0.36x0.30in
  • IC body dimensions - 0.36x0.23in
  • Dimensions between pin centers - 0.1in

  The SVG we'll need to draw will be a little larger though to look nice and be perfectly aligned with the grid. Let's say pin rectangle height will be 0.035.

  Modifications:

  • IC dimensions (with pins): add 0.04 to width amd height
  • IC body dimensions - multiply pin rectangle height by 2 and subtract that from IC body height, body width stays the same

  Resulting dimensions for ATtiny85:

  • IC dimensions (with pins) - 0.38x0.34in
  • IC body dimensions - 0.38x0.27in

  
  

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• 2) Making a footprint from scratch

  Arya • 12/13/2016 at 02:54 • 2 comments

  The footprint I got minified is a good template. I could just put "ATtiny85" into "ic_text"... come to think of it, it's already there. However, let's make it from scratch! There'll be issues like grid sizes and dimensions and it would be unfair not to get those sorted out.

  ---

  Woke up, continuing work. Does the size even matter? I measured the real Tiny's dimensions and they weren't to scale with the SVG. Let's scale our ATtiny85 in Inkscape to those dimensions and find out:

  Well. First of all, I enlarged that footprint but it shrinked. Second thing - Inkscape fucks up the SVG, making it unreadable:

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• 1) See how the existing parts look like

  Arya • 12/12/2016 at 23:50 • 4 comments

  Nothing's better than reverse-engineering, right?
  Well, maybe I can actually learn something from the existing parts, especially provided there are so many DIP-8 ICs shipped with Fritzing. I'm creating everything from scratch, but this saves my frustration for me and time for readers.
  

  Fritzing is huge - 182MB archived, 360MB unpacked. I can go make hot chocolate while the archive is unpacking.

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