Not only useful to replace traditional mechanical switches in 3D printers, but also in any Arduino or Raspberry Pi project. A nice bonus is a very bright LED on the board that lights up when the light path is broken.
Vacuum cleaner KARCHER VC 3, yellow
176 Review
5Pcs 19Mm 12V 24V Waterproof Latching Push Button Switch With Wiring Harness And LED Indicator Light, Pre-Wired SPDT Self-Locking 4 Pin Marine Metal Switch For Boats Cars Trucks (Blue)
22 Review
MIDI keyboard Axelvox KEY49j white
22 Review
TWTADE/AC 24V 10A Coil Electromagnetic Power Relay 8 Pins 2DPT 2NO+2NC With Indicator Light And Socket Base -YJ2N-LY
9 Review