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v4 Parts + PCB Assembly

A project log for Refreshable Braille Display

Refreshable Braille Display powered by PCB electromagnets

basim-cheema-sabirBasim Cheema-Sabir 03/11/2025 at 07:142 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.

Discussions

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

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?

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

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.

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