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Powering modulated IR LEDs with more current than Arduino outputs can supply - General Electronics - Arduino Forum
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Driving an IR LED via a transistor (NPN) driver. A logic 1 output is... | Download Scientific Diagram
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power supply - Is this IR LED driver circuit with a transistor OK? - Electrical Engineering Stack Exchange
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power supply - Is this IR LED driver circuit with a transistor OK? - Electrical Engineering Stack Exchange
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