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Amazon.com: CQRobot Ocean: TSL25911FN Ambient Light Sensor Compatible with Raspberry Pi, Arduino, STM32. 0 to 88000Lux Detection Range, 600M: 1 Wide, for Industry, Mobile Phone, Computer, Lighting, GPS, etc. : Electronics
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RPi.GPIO basics 6 – Using inputs and outputs together with RPi.GPIO – pull-ups and pull-downs – RasPi.TV
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