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SCR Tester from a Flashlight

Step 9Trigger the gate

Trigger the gate

Touch the white (positive) clip to the gate lead. The bulb should light up and remain lit even when you remove the connection to the gate. If it does not light, the SCR is bad, you have not met the SCRs minimum gate current or your batteries are weak.

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I like to tinker and experiment with electronics, robotics, programming, and photography