12/5/2023 0 Comments Optoisolator circuitThe circuit diagram of the PC817 IC Optocoupler is shown below. PC817 Optocoupler comes with inside safety from reverse current, because of the flow of current in one way this IC defends the infrared from any current.This IC can function through any type of device including internal interfaces such as Microcontrollers, TTL devices & also with HIGH DC voltage through some inside resistors.This IC is used with an additional resistor through high voltage devices to function through fewer voltage devices. This IC includes internal protection for both input & output from electrical isolation and it protects up to 5KV.This IC includes 4-pins and is available in two packages like SMT and DIP.The features of the PC817 IC Optocoupler include the following. Once the temperature increases then the IC will be damaged. While doing soldering, the optocoupler’s temperature range is 260 degrees.The internal storage temperature of this IC ranges from -55 -125 degrees.The max operating temperature ranges from -30 to 100 degrees.At the Collector & Emitter Terminals, the ratio of maximum voltage is 80V.The maximum Voltage of the Collector-Emitter is 80V (max).At the collector terminal, the maximum current ratio is 50mA.Forward Voltage of Input Diode is 1.25V.Pin3 (Collector): This is an o/p pin of the IR Tx in the optocoupler and it provides the logical o/p through getting the infrared signal. It will provide the infrared to create the common GND through the circuit & power supply Pin2 (Cathode): In this IC, this is the cathode pin of the infrared LED (Tx). This pin provides a logical input signal toward the internal IR. Pin1 (Anode): In the optocoupler IC, this is an Anode pin of infrared LED (Tx). The pin configuration of PC817 Optocoupler is shown below, This IC includes 4 pins like 2 input pins and 2 output pins where each pin and its functionality is discussed below. This IC has several uses because of its tiny size & control operation. After that, the receiver will provide the logic signal like an output. From every face of this IC, the input voltages will have a similar effect it will simply transmit the signal toward the receiver. To any microcontroller or any DC device with less voltage, it can be connected directly. The signal can be transmitted optically in between an i/p and an o/p side without any physical connection. PC817 IC includes an LED & a phototransistor which are connected jointly optically. In the circuit of PC817 optocoupler, the IR gets the noisy signal from one part and transmits it to another using the IR signal so that it performs based on the design of the circuit.
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