Differences between revisions 1 and 3 (spanning 2 versions)
⇤ ← Revision 1 as of 2023-12-23 22:36:12 →
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Editor: KojiaraiATligoDOTorg
Comment:
← Revision 3 as of 2023-12-28 09:03:09 → ⇥
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Editor: KojiaraiATligoDOTorg
Comment:
Deletions are marked like this. Additions are marked like this.
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1. Plan the connection in a system diagram  1. Plan the connection in a system diagram
Line 5: Line 5:
 * What is the form factor of the input and output connectors
 * How the connectors are assigned to the front and rear panels
 * Assign reasonable panel labels		    * What is the form factor of the input and output connectors
   * How the connectors are assigned to the front and rear panels
   * Assign reasonable panel labels
Line 9: Line 9:
1. Panel design
 * Copy the past design files, as they are nicely designed for the LIGO chassis
 * If the PCB is directly mounted on the panel, be aware that the connector height needs to be precisely adjusted.		  1. Panel design
   * Copy the past design files, as they are nicely designed for the LIGO chassis
   * If the PCB is directly mounted on the panel, be aware that the connector height needs to be precisely adjusted.
Line 13: Line 13:
 * Arrange the connectors and the labels as planned in 1.
 * Is the planned connector assignment physically feasible?
 * If not, how are the assignment/arrangement should be?		    * Arrange the connectors and the labels as planned in 1.
   * Is the planned connector assignment physically feasible?
   * If not, how should the assignment/arrangement be?
Line 17: Line 17:
 * Once the design is done, reflect the modification in 1.
 * Save the panel files. Export the design in PDF and STP		    * Once the design is done, reflect the modification in 1.
   * Save the panel files. Export the design in PDF and STP
Line 20: Line 20:
1. PCB design in Altium
 * Copy the past files depending on the # of layers (usually 2 or 4)
 * First of all just copy the files and open it in Altium, then rename the file names.     * How to make a library for the missing parts		  1. SCH/PCB design in Altium
   * Copy the past files depending on the # of layers (usually 2 or 4 layers)
   * First of all, copy the files and open them in Altium, then rename the file names.
Line 26: Line 24:
1. Assembly
 * aaa 		   * Approximately design the circuit.
   * Look at the PCB file and remove all the components from the PCB (except for the PCB outline)
   * Use "Design/Import Changes From ....PrjPcb" to force the consistency between the SCH and PCB. Always incorporate the change into the PCB.
   * You'll face a bunch of errors because there are missing footprints. Update the library.

   * By the way the paper size can be changed from the "properties" panel of the schematic by selecting the templates.
   
   * How to make a library for the missing parts
      * Go to the "Manufacturer Part Seach" panel.
      * There, search for your favorite component. The component has to have a green IC chip mark (i.e., has a 2D/3D footprint model)
      * Click the component photo to download the model. It is downloaded to somewhere weird like c:\Users\Public\Documents\Altium\AD21\Library\ExportIntLib\
      * Extract the zipped library. Open xxxxxx.LibPkg. It contains PcbLib and SchLib.
      * Go to the downloaded SchLib and copy the component to your SchLib. The component has a strange name, so this is the chance to change the name for your convenience.
      * Go to the downloaded PcbLib and copy the component footprint to your PcbLib. The component has a strange name, so this is the chance to change the name for your convenience.
      * If you change the footprint name, the link between the component and the footprint is broken. Correct it by adding the footprint in the SchLib.
      * Try to incorporate all the 3D models into the parts as much as possible. It will help to match with the panels in the assembly confirmation below.

   * For the standard 19inch LIGO units, the board width is expected to be 14000mil. Use the dimensions to align the connectors along with the panel design.

 1. Assembly
   * aaa

How to work with an electronics project

  1. Plan the connection in a system diagram
    • What is the form factor of the input and output connectors
    • How the connectors are assigned to the front and rear panels
    • Assign reasonable panel labels
  2. Panel design
    • Copy the past design files, as they are nicely designed for the LIGO chassis
    • If the PCB is directly mounted on the panel, be aware that the connector height needs to be precisely adjusted.
    • Arrange the connectors and the labels as planned in 1.
    • Is the planned connector assignment physically feasible?
    • If not, how should the assignment/arrangement be?
    • Once the design is done, reflect the modification in 1.
    • Save the panel files. Export the design in PDF and STP
  3. SCH/PCB design in Altium
    • Copy the past files depending on the # of layers (usually 2 or 4 layers)
    • First of all, copy the files and open them in Altium, then rename the file names.
    • Approximately design the circuit.
    • Look at the PCB file and remove all the components from the PCB (except for the PCB outline)

    • Use "Design/Import Changes From ....PrjPcb" to force the consistency between the SCH and PCB. Always incorporate the change into the PCB.

    • You'll face a bunch of errors because there are missing footprints. Update the library.
    • By the way the paper size can be changed from the "properties" panel of the schematic by selecting the templates.
    • How to make a library for the missing parts
      • Go to the "Manufacturer Part Seach" panel.
      • There, search for your favorite component. The component has to have a green IC chip mark (i.e., has a 2D/3D footprint model)

      • Click the component photo to download the model. It is downloaded to somewhere weird like c:\Users\Public\Documents\Altium\AD21\Library\ExportIntLib\

      • Extract the zipped library. Open xxxxxx.LibPkg. It contains PcbLib and SchLib.

      • Go to the downloaded SchLib and copy the component to your SchLib. The component has a strange name, so this is the chance to change the name for your convenience.

      • Go to the downloaded PcbLib and copy the component footprint to your PcbLib. The component has a strange name, so this is the chance to change the name for your convenience.

      • If you change the footprint name, the link between the component and the footprint is broken. Correct it by adding the footprint in the SchLib.

      • Try to incorporate all the 3D models into the parts as much as possible. It will help to match with the panels in the assembly confirmation below.
    • For the standard 19inch LIGO units, the board width is expected to be 14000mil. Use the dimensions to align the connectors along with the panel design.
  4. Assembly
    • aaa

Electronics/HowToDesignCircuits (last edited 2023-12-29 09:41:35 by KojiaraiATligoDOTorg)