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Adafruit IR Break Beam Sensor 3mm LEDs [ADA2167] auspowers_batchtwo 1 4" Tube OD x 1 8" industrial_DE_Aug2026 1 4" Tube OD x 1 8" NPT Male 3V with SPI Interface ST7789 IC Driver Most microcontrollers have the ability to turn on a built in pull up resistor If you want to control a relay or LED or whatever
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