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layout title permalink sequence design_start design_end manufacturing_start manufacturing_end integration_start progress lessons
csq
CSQ
/csq
7
2023-10-01
2024-02-29
2024-03-01
2024-03-21
2024-03-22
month details
April 2024
Board bring-up and debug of the first prototype PCB
month details
March 2024
Send for manufacturing and assembly of 2 prototypes. This phase includes PCB manufacturing, component procurement, pick and place, 3D printing the cases.
month details
December 2023
Completing the schematics with footprints, MPN and availability of assembly parts.
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(Layout) Add <a href="https://youtu.be/g4m91gv-4oQ?t=1088">fudicial markers</a> for pick and place
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(Case) Add more rounded corners and chamfers for <a href="https://www.pinterest.com/sayanee/product-design/">timeless product design</a> enclosures
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(Case) Following DFA (Design for Assmebly), make the case easier to assemble by creating assymetric screw hole positions on the PCB and case
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(Schematic) Add <a href="https://forum.kicad.info/t/understanding-multi-sheet-schematics/42922/2">multi sheet schematics</a> for better readability
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(Schematic) Add component images and parameter graphs <a href="https://github.com/EPFLXplore/XRE_LeggedRobot_HW/blob/master/amulet_controller/Schematic/amulet_controller.pdf">for better understanding</a>
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(Firmware) Use <a href="https://github.com/arduino-libraries/Arduino_ESP32_OTA">OTA updates</a> for firmware
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(Schematic) Add a switch to turn on and off wireless communication to fallback to legacy functionality
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(BOM) Add a header male pin (GND and VUSB/VBAT) to use with nRF profiler for power consumption measurements
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(Case) Make the text height bigger for LEDs and ON/OFF power switch
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(Case) Add more chamfers and rounded corners for a better aesthetic
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(Case) <strong>Teeth and groves</strong> - Make the teeth thicker for better strength
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(Case) <strong>Teeth and groves</strong> - Add holder in the teeth to that the top and bottom case do not slide
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(Case) <strong>Teeth and grooves</strong> - Include visual cues on the exterior for finger placement
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(Case) PCB holder screw lug can be shorter
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(Case) Add an LED slot to view the charge LED from the outside without opening the case
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(Case) Add <a href="https://www.pollen.am/design_for_3d_printing_edges_fillets_ribs/">filletted poles</a> for screw lugs and holders on the case base
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(Power) <strong>Battery</strong> - Use flat LiPo battery for a compact design
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(Layout) <strong>PCB</strong> - Add silkscreen pin labels for all connectors that extend outside the PCB E.g. pin headers or USB-C
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(Layout, Case) <a href="https://www.fiveflute.com/guide/design-for-assembly-dfa-best-practices/">Mistake proof assembly</a> by designing the case and PCB to fit only one way, E.g.asymmetric screw holes, PCB shape and screw lugs
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Use Conventional Commit Messages for <a href="https://www.conventionalcommits.org/en/v1.0.0/">better git history</a> with scopes such as firmware, case, schematic, layout, docs, bom, power, design, website, chore (CI/CD/updates).