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If you buy some leds ,you can't confirm what's the leds color ,how to get it. A easy way is to test them use button battery. we have ...
LED Heart Ornamentby dukode
Photo Components & Testingby Josehf Murchison
Fun Wih Push Lightsby Geek07Boy
How to test a ledby Ujwal Bhagat
Replace you cars instrument panel lights with LEDs.by trayo
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