What is optocoupler pc817?
An optocoupler is also called an optoisolator, photo-coupler & optical isolator is one kind of semiconductor device that allows the electrical signal to transmit between two isolated circuits through light.
What is the purpose of an optocoupler?
An Optocoupler can do the job. Let there be light! This device allows you to transmit an electrical signal between two isolated circuits with two parts: an LED that emits infrared light and a photosensitive device which detects light from the LED.
How do I use PC817?
PC817 is normally used in embedded project for isolation purposes. In my embedded projects, I place PC817 after Microcontroller Pins to isolate back EMF, in case of motor control etc. PC-817 has several applications e.g. noise suppression in switching circuits, input/output isolation for MCU (Micro Controller Unit).
Is optocoupler a switch?
Optocouplers can either be used on their own as a switching device, or used with other electronic devices to provide isolation between low and high voltage circuits. You’ll typically find these devices being used for: Microprocessor input/output switching.
Can a optocoupler fail?
The results show that optocouplers have two failure modes, one is sudden failure and the other is degradation failure; the maximum temperature stress of optocoupler can’t exceed 140 °C; the increase of leakage current of optocoupler is caused by movable ions contaminating the LED chip.
What is pc817 optocoupler?
The IR circuit can be designed by hand but we have a fully predesigned and small size integrated circuit IC knows as PC817 Optocoupler. The PC817 Optocoupler is small in size and comes in multiple packages. It can be directly connected to any low voltage dc device or microcontroller.
What is an optocoupler IC?
PC817 IC is an optocoupler that includes a phototransistor and an IR diode. In various circuits, filters play a key role to remove the noise.
What is the voltage ratio of an optocoupler?
The voltage ratio at the emitter and collector will be a maximum of 80V. The cut-off frequency for optocoupler will be 80kHz. Optocoupler also comes with rising and fall time.
What is pin 1 and pin 2 in optocoupler?
Pin 1 is an anode pin of IR input within the Optocoupler. It will give the logical input signal to the internal IR. Pin 2 is the cathode pin of the IR within the optocoupler.