Mini Button Pad PCB - COM-08963 - SparkFun Electronics
G Pro X Superlight Hot-swappable PCB Board - FacFox Shop
Totally custom macro keyboard. Only 1 mistake in pcb design was forgetting pulldown resistors for the buttons. Arduino pro micro with 3d printed case and buttons and custom pcb. : r/ArduinoProjects
WOWOONE 25pcs 12x12x7.3 mm Tact Tactile Push Button Switch, 4 Pin Momentary SMD PCB Micro Switch with Cap for Arduino, AE1027 5 Colors Round Cap Assortment Kit DIY Project: Amazon.com: Industrial &
Pololu - Mini Pushbutton Power Switch with Reverse Voltage Protection, LV
1pc High Quality RepRap Endstop Switch PCB Mount X Y Z End Stop Micro Switch for Prusa Mendel MK, Free Shipping|switch micro switch|switch switchswitch endstop - AliExpress
PCB Design: An Optocoupler Tutorial for Your PCB Layout | Blog | CircuitMaker