This Magnetic Start Button uses a reed switch and magnets to create a simple, reliable, and contactless trigger. It’s compatible with both pull-up and pull-down resistor configurations using 3 wires: GND, VCC, and OUT. For best results, install the two 5×3 mm magnets with opposite polarity. The housing fits Restock 162-924 5/8" spacer washers from Home Hardware, giving a solid and responsive press feel. Ideal for DIY electronics, robotics, or custom control panels.

Required Parts

• Reed Switch (Amazon)
• Resistor (Amazon)
• 2× Magnets – 5 mm diameter × 3 mm thick (Amazon)
• Restock 162-924 5/8" Spacer Washer (Home Hardware)
• 3 Wires (GND, VCC, OUT)