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How to make a Tester for any LED at home
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YouTubeInventor AW
How to make a Tester for any LED at home
components list : mini voltmeter 3.7V battery charging board DC booster 3 to 30V on/off switch 1 k resistor ................. SMD Tester home made Easy Learning
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Shop how to make a tester at home

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$12.99
Mold Test Kit For Home With Free Lab Analysis - 5 Simple Detection Tests DIY At Home Mold Air Tester - Test HVAC System,Surface Mold For Home Indoor
Amazon.com
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