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Why use a bipolar transistor to drive power LEDs? | Efficiency Wins
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transistors - High side or low side LED driver with NPN BJT? Which is
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Single Transistor LED Flasher Circuit | Homemade Circuit Projects
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Why use a bipolar transistor to drive power LEDs? | Efficiency Wins
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Using a transistor to control a LED - Electrical Engineering Stack Exchange
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Power an LED driver using off-the-shelf components - EDN
[SOLVED] LED Driver by using PNP transistor