• PCB v4 Schematic & Design

    Basim Cheema-Sabir • 12/18/2024 at 03:27 • 0 comments

    Update 12/17/2024:

    Researched different ICs for controlling a full 6-dot braille cell.

    TLC6C5912-Q1 12-bit shift register, to control all 12 outputs associated with the full cell. Two outputs are required for each dot to drive current in both directions.

    DRV8212DRLR H-bridge motor driver IC, to take digital signal from shift register and enable current flow in a specified direction.

    Completed PCB v4 design:

    3D render:

    KiCad design:

    Completed PCB v4 Schematic:

    (coils not shown)

  • PCB Arrival, Completed First Prototype + Successful Initial Testing

    Basim Cheema-Sabir • 11/14/2024 at 06:17 • 0 comments

    Update 11/13/2024:

    PCB Arrival

    PCBs arrived from JLCPCB (pictured below)

    Completion of First Prototype

    Soldered pin headers, bolted 3D-printed assembly to PCB

    Successful Testing

    See video

  • Printed first prototype parts, Designed first prototype PCB

    Basim Cheema-Sabir • 11/04/2024 at 21:18 • 0 comments

    Update 11/04/2024

    First prototype PCB design consists of two coil setups, one of which is a single layer, the other being a two layer version, connected in series. Each coil is 6mm in diameter with a 0.15mm trace width/clearance, and approximately 9 turns per layer.

    PCB design:

    CAD model:

    M2 bolts will be used to align and fasten the outer 'chamber' part over the center of the coil.

    The two parts were printed on the Creality Halot Lite SLA 3D-printer using clear ABS-like resin.

    Printed parts (microSD for scale):