LED tester and comparison device
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30:00
Using salvaged lithium cells to power LEDs directly. (with protection test)
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26:58
Simplest solar light possible, using old phone battery.
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10:02
The CURSE of white LEDs
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1:08:10
🔥Apenas 1% conhece este segredo: as 10 ideias geniais de DIY que você não vai acreditar 😱
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23:12
How to use your trashy meter without blowing it up (much)
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17:00
How to Turn an LED On
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15:55
A Farsa da Indústria dos Óculos.. (E como ela te faz de TROUXA)
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47:48