Interrupt Progress Update 7-11

Harry E DeBee

— 1 min read

The next revision of the Interrupt is coming along nicely. This week we reviewed the changes from our last design meeting. The case model has been updated with port provisions for the RPI Zero location change we made in the last update. We have provided the STEP file of the current case revision in our discord server. This is not the final revision, but this should give you a feel for the device and allow you to print a preliminary case if you would like. 

We also discussed the out of the box features we plan to include in the first revision of the base UI.

PCB design is progressing and we should have a Dev Board assembly in production before the end of July.

A line item breakout of current steps and changes are listed below.

Enclosure Progress

  • STEP file of enclosure added to the Interrupt Discord server. Not the final revision, but you can 3D print the current case model
  • Provisions made for port access - USB, HDMI, SD Card, Power
  • Textured grip and finger grooves
  • Enclosure TBD
    • Keyboard adjustments (Adding Function Keys)
    • GPIO Header Ports
    • Physical power button
    • Potential IP Rating (IP52)

Firmware Foundations

  • Discussed Core functionality requirements for Base OS
  • UI Design and Customization options (e.g. User Expandable Menu)
  • Driver requirements for core peripherals
  • GitHub Repository Creation
    • Open Source planned after functional baseline

PCB Progress

  • Block diagram adjusted for design changes
  • NFC 13.5 MHz support (ST25R3916)
  • IR Support
  • Dev Board Assembly (Once final part/functionality selection confirmed)
  • Sub-GHz RF Design (CC1101RGPR)
    • Support 300-348 MHz, 387-464 MHz, and 779-928 MHz bands with software-controlled filter switch
    • Discussion about crystal (27 MHz preferred for flexibility)
    • FCC implications noted for commercial compliance
    • Power amplifier / LNA: desirable but dependent on cost

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