مفتاح إمالة / اهتزاز SW-520D (عبوة من 5)

The metal ball mechanism is clever and much safer than the old mercury version I was using. Each switch activates reliably at a 30-degree tilt, and the pack of five gives me plenty for my project.

I was pleasantly surprised by how responsive these are—just a slight jostle and the circuit closes reliably. Perfect for my simple alarm project.

The metal ball inside rolls smoothly and triggers the switch every time I test it, just like the old mercury ones I used to avoid messing with. Five of them in the pack means I’ve got spares for the next project, and it’s nice knowing they’re ROHS compliant so I don’t have to worry about disposal.