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Its working is simple, when a used apply voltage to the IR LED which is connected on pin 1 and 2 the LED become activated and the light is received by the internal phototransistor hence making it in saturation state due to which it connects the pin 3 and 4 with each other. PC is a widely used optcoupler and works well in electronic circuit for a single isolation task. If you require more isolation tasks at the same time then you can also use other optocouplers that contains couple of IR LEDS and phototransistors in a single package.
If you are going to design an electronic circuit in which there is a chance of voltage spikes or voltage surge which may weak or destroy the components or the circuit then you can use the PC optocoupler to isolate the circuit.
Moreover it can also be used to remove noise from an electronic signal, isolate DC and low voltage circuits from AC and high voltage circuits. You can also use it where you want to control larger voltage or AC voltage from small any small signal which can be a digital signal or analog.
Using PC optocoupler is very easy, there are four pins shown in the above pinout details. The pin 1 is anode or positive pin of the IR LED should be connected from the output signal of your circuit and pin2 should be connected to the ground.
The other part of the circuit which you want to isolate or controlled should be connected with the pin3 Emitter of the photo transistor and pin4 Collector of the photo transistor. To safely long run this component in your circuit is recommended to always stay below the absolute maximum ratings. March 21, March 11, March 6, Your email address will not be published.
Save my name, email, and website in this browser for the next time I comment. How to Safely Long Run in a Circuit To safely long run this component in your circuit is recommended to always stay below the absolute maximum ratings. Download Datasheet To download the datasheet just copy and paste the below link in your browser. Leave a Reply Cancel reply Your email address will not be published.
PC817 Optocoupler Pinout, Datasheet, Equivalent, Features & Other Details
Note: More details can be found at the PC datasheet which is available for download at the end of this page. This IC is used to provide electrical isolation between two circuits, one part of the circuit is connected to the IR LED and the other to Photo-transistor. The digital signal given to the IR LED will be reflected on the transistor but there will be no hard electrical connection between the two. This comes in very handy when you are trying to isolate a noisy signal from your digital electronics, so if you are looking for an IC to provide optical isolation in your circuit design then this IC might be the right choice for you.