Tarjeta de Optoacoplador

Sparkfun ElectronicsSKU:RB-Spa-750
Número de fabricante: BOB-09118

Precio  :
Precio de oferta $5.79

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Solo queda 1 unidad

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D
David
disappointing

I should have inspected the schematic more closely. Each output (from the opto-coupler IC) is buffered by a transistor in common-emitter configuration with a 10K pull-up resistor. It can't be used to drive a relay or other load. When the input goes high (logical-1), the opto-coupler IC becomes active, grounds the base of the output transistor, which then turns off. The output then goes to logical-1, pulled high by the 10K pull-up. I ended up buying a couple of naked opto-coupler chips, and tossed this breakout board into the parts bin for a future project.

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