#######################   Diagramming   ######################

https://electronics.stackexchange.com/questions/28251/rules-and-guidelines-for-drawing-good-schematics
  Use component designators  -  Q1, R5, etc.
  Clean up text placement
  Basic layout and flow  -  higher voltages towards the top, lower voltages towards the bottom and logical flow left to right
  Draw pins according to function
  Direct connections, within reason
  Design for regular size paper
  Label key nets
  Keep names reasonably short
  Upper case symbol names
  Show decoupling caps by the part
  Dots connect, crosses don't
  Good schematics show you the circuit. Bad schematics make you decipher them.

Pin name abbreviations: https://www.altium.com/files/libraries/ls0001_pinabbreviation.pdf


#######################   PCB Ordering   ######################

JLCPCB:
  Export Gerbers (top/bottom cu, top/bottom solderMask, top silkscreen, edgecuts)
  Export Excellions (PTH and NPTH) - the sizes aren't specified anywhere???
  Upload to JLCPCB
  
  NOTE - entire board can be flipped.
    

#######################   KiCAD   ######################

Add components (shift-A)
Connect (shift-W)
Assign footprints
Generate netlist
Update PCB (f8)
Load netlist
LAYER: t.cu or b.cu, connect pins (shift-X)
LAYER: edgecuts, draw line (ctl-shift-L) and draw PCB outline


New Symbol:
    Open Symbol Editor
    File -> New Library -> Save in project folder
    Recommended to save in Project
    New Symbol
    Edit Symbol Properties
        Reference = U
        Value = Name of component
        Footprint = Default Footprint
        Datasheet = URL of datasheet
        Symbol Name = Name of component
        Symbol = all unchecked
        Annotations = all checke
    Draw Rectangle
        E -> Fill
    
New Footprint:
    Open Footprint Editor
    File -> New Library -> Save in project folder -> Project
    Select F.Cu layer, create pad, edit pad, copy&paste pad
    Good practice is keeping pad1 @ origin???
    F.Fab = Actual construction
    F.CrtYd = Clearance

#######################   PCB (Eagle)   ######################

#Components
    1/4W resistors: 2.5 standing, 5mm spacing tight, 7.5mm loose
    
#Board
    Making large traces: POLYGON (turn off thermals and isolation), then RATSNEST

#Not all parts of a component shown
  INVOKE -> Select component
  
#Change border margins
  Tools -> DRC -> 0.1mm
  
  


#######################   Eagle PCB-Gcode   ######################

#Tool Settings
    https://www.cnczone.com/forums/pcb-milling/81853-pcb-gcode-remove-copper-traces.html#post618301
    Default (bit diameter)
    Maximum (will perform multiple passes to this distance)
    Step Size (distance per bit)
    DON'T MIRROR.  If no top etch, then holes will be drilled from bottom.  Remember board is mirrored over Y axis for bottom.
    
#Adding Components Through .scr File
    Open td0g.lbr library in library manager
    Select 'Run SCR'
    Select .scr file
    Save .lbr
    
#Creating Components
    Create Footprint
        Can duplicate and modify another component
            Open a footprint in the target library (doesn't matter which)
            In control panel, right-click component to copy from other library, select 'Copy To Library'
            Save
        To make all-new footprint
            Open library manager (double-click on library)
            Library -> Manage Packages
            Enter new package name, OK
            PAD, SMD, LINE commands
            TEXT on layer 49
            
    Create Symbol
        Can duplicate and modify another component
        Add pins where necessary
        To make all-new symbol
            Open library manager (double-click on library)
            Library -> Manage Symbols
            Enter new symbol name, OK
            PIN, LINE commands
            rmb pin -> Properties -> Edit name
            TEXT on layer 49
        
    Create Device
        Device Button -> New Device Name -> OK -> Yes
        New (bottom right) -> Add Local Package -> Select footprint
        Add Part (left side) -> Select symbol -> Place
        Connect (bottom right)
        Save and exit
        
        

#######################   Tools   ######################

https://github.com/td0g/PCB_Milling_Tools