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mucahitdemir / Direct-Memory-Access-DMA-Programming-with-STM32F4xx

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Optocoupler usage on integrated circuits? #12

Open mucahitdemir opened 2 years ago

mucahitdemir commented 2 years ago

Optocouplers, also called optoisolators, are semiconductor devices that isolate unwanted signals by physically separating high-voltage circuit systems from neighboring low-voltage systems. Optocoupler usage typically: Microprocessor input/output switching. DC and AC power control.

Figure below shows an optotransistor DC switch Source: Electronics-tutorials image image

mucahitdemir commented 2 years ago

In the figure, the externally connected 270kΩ resistor is used to control the sensitivity of the photo-transistor base region. capacitor stops any unwanted spikes or transients from false triggering the opto-transistors base.