v4 Parts + PCB Assembly

A project log for Refreshable Braille Display

Refreshable Braille Display powered by PCB electromagnets

Basim Cheema-Sabir • 03/11/2025 at 07:14•2 Comments

Update 3/11/2025:

Shift Register and H-Bridge ICs arrived, and PCBs arrived. Soldered SMD components on using microscope and fine soldering tip.

Next Steps:

Write Arduino code to control shift register and send input signals to H-Bridge ICs.

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PCB v4 Schematic & Design

12/18/2024 at 03:27 • 0 comments

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Prototyping w/ 74HC595 Shift Register

04/01/2025 at 22:00 • 0 comments

Discussions

BRUNO RAFAEL DE OLIVEIRA MARTINS wrote 03/11/2025 at 12:39

Man, this is magnificent work! Congrats! How did you came up with the specs for the pcb coils? Was it trial and error, or you calculated it?

Are you sure? yes | no

Basim Cheema-Sabir wrote 04/01/2025 at 21:42

mostly trial and error! i looked at the standard braille convention and tried to make the coils fit in a 4-5mm diameter circle. trace width is 0.15mm, smallest that jlcpcb can manufacture, so i can pack as many turns in as possible.