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LED Relay Contact Tester

LED Relay Contact Tester

thingiverse

I use these when I'm programming circuits, connecting one test lead to each relay allows me to visually confirm if it's energized. With minimal soldering and some spare resistor-sized leads, I can create a functional circuit tester. A CR2032 battery powers the device, secured with tape after assembly. The leads are designed long enough to reach into the screw contacts of my relays for easy testing.

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