Imported from GitHub: christrotter/microswitch-pcb · commit 8914621 · license MIT

Description

A "per-key" pcb using microswitches and including LED bits

README

microswitch-pcb

Designed for use on the ArcPedals mk2 - with the accompanying files, a drop-in replacement for the old MX-based switches.

JLC wanted to charge me extra for using SK6812-MINI-E leds, so I swapped over to the SK6805 and tripled the led count. As one does.

Overview

Only items of note - the pour is on the top layer only, and I tried to make it as friendly for manufacturing and human usage as possible.

Parts

Gerbers, bom, position files and more in the releases section.

• 0402 100nF multilayer ceramic capacitor
• SOD-123F 1N4148W diode
• Omron D2F-L microswitch (key point, plunger only; heavier spring cuz feet)
• JST-XH-2.54 horizontal (or vertical, up to you) 6-pin connector
• 3x SK6805-EC15 LEDs

Schematic overview

Pretty straightforward.

• 2.54 header (I designed for JST-XH 2.54 horizontal)
• 5v/GND power system w. 100nF capacitor
• LED signal via DI/DO pins
• 'key' signal via IN/OUT pins w. default diode on return leg
  • optionally cut the 2/3 bridge trace and solder pads 1/2 together for the direct pin (to GND)

3d view