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)

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

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):