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Optocoupler circuit

Optocoupler Tutorial and Optocoupler Applicatio

An Optocoupler, is an electronic components that interconnects two separate electrical circuits by means of a light sensitive optical interface. We know from our tutorials about Transformers that they can not only provide a step-down (or step-up) voltage, but they also provide electrical isolation between the higher voltage on the primary side and the lower voltage on the secondary side An optocoupler or optoisolator chip is a chip that allows for electrical isolation between the input of the circuit and the output of the circuit. By electrical isolation, we mean that the power going into the input has no effect whatsoever on the power on the output Optocoupler is a component which uses light energy to connect two different electrical circuits or transfer energy from one circuit to another circuit. Two circuits are completely electrically isolated to each other that means there is no electrical connection between them

Optocoupling devices work as logic level changeovers between two circuits, It has the ability to block noise transfer across the integrated circuits, for isolating logic levels from high voltage AC line, and for eliminating ground loops. Optocouplers become an effective replacement for relays, and for transformers for interfacing digital circuits. What is Optocoupler and How It Works As we have already learnt about transistors, an ideal transistor will not allow any current to pass through it if the base pin is not triggered. But, if you carefully manage to decap a regular discrete transistor and apply a voltage across the collector and emitter leads, you'll notice that a tiny current still flows Optocoupler zijn opto-elektronische componenten die voor de overdracht van elektrische signalen bij gelijktijdige galvanische scheiding van de circuits dienen. Hiervoor stuurt een licht- of laserdiode in de ingang stroomkring licht op de ontvanger, die meestal uit een fototransistor of een fotodiode bestaat

Gebruikt om een deurbel circuit te bouwen. Deze geeft nu het signaal door een mijn arduino. Werkt perfect. Geplaatst op 24 september 2018 Karwan barzinje. Ik vind het een goed product. Geplaatst op 10 juni 2017 Robbert Loos. Meer laden. PC817 Optocoupler. Optocoupler for Switching DC Circuit: In the upper circuit a Photo-Transistor based optocoupler circuit is used. It will act like a typical Transistor switch. In the schematic a low cost photo-transistor based opto-coupler PC817 is used. The infra-red led will be controlled by the S1 switch

How to Build an Optocoupler Circuit

optocoupler-tagged Public Circuits. Now showing circuits 1-5 of 5. Sort by HCPL2630 PUBLIC. by britonet | updated September 13, 2016. hcpl2630 hcpl2631 opto-isolator optocoupler VO615A, SFH615A, SFH617A, SFH6156, SFH690, TCET1100, TCMT1100, TCLT1000. At a glance, it's easy to mix up an Optocoupler with an integrated circuit (IC). This Triac Optocoupler looks like an IC. (Image source) How It Works. A current is first applied to the Optocoupler, which makes the infrared LED emit a light that's proportional to the current

Optocoupler Types, Applications with Examples and Circuit

  1. As we know the term Optocoupler/optoisolator means we use light to indirectly couple (isolate) two sets of circuits. The speciality of 6N137 is that it has a high speed LED and hence can switch at 10Mbit/sec the output is NAND gate logic with an open drain transistor as one input and Enable pin as another input
  2. II 4N25 Optocoupler 2.1 4N25 Overview The internal circuit structure of the photocoupler 4N25 is shown in Figure 1. Figure 1. 4N25 internal circuit structure. The chip is a dual in-line device, with 6 outer leads, and the input end light emitter is composed of light emitting diodes. 1 pin is Anode; 2 pin is Cathode; 3 pin is NC; 4 pin is Emitte
  3. An optocoupler (or an optoelectronic coupler) is basically an interface between two circuits which operate at (usually) different voltage levels. The key advantage of an optocoupler is the electrical isolation between the input and output circuits. With an optocoupler, the only contact between the input and the output is a beam of light
  4. PIR to Optocoupler circuit 201230: Trouble: Simulator expectations vs constructed circuit; 555timer. I need help with my circuit (optocoupler, transistor, relay) Need help hooking up an H11AA1 optocoupler to detect current in an AC circuit. Looking for review of circuit design - 24v AC through Optocoupler to 3.3v ESP826
  5. An opto-isolator (also called an optocoupler, photocoupler, or optical isolator) is an electronic component that transfers electrical signals between two isolated circuits by using light. Opto-isolators prevent high voltages from affecting the system receiving the signal
  6. Definition: An optocoupler or optoelectronic coupler is an electronic component that basically acts as an interface between the two separate circuits with different voltage levels.Optocouplers are common component by which electrical isolation can be supplied between the input and output source. It is a 6 pin device and can have any number of photodetectors
  7. Optocoupler. Naar navigatie springen Naar zoeken springen. Een opto-coupler. Een opto-coupler is een kleine geïntegreerde schakeling waarin zich een led en een lichtgevoelige transistor bevinden. Door een bepaalde spanning.

PC817 Optocoupler Explained / Description. Optocouplers also called photocouplers & opto isolators, they are IC type looking components available from 4 pins to many numbers of pins, they are mostly used for isolating of two circuits from each other. PC817 is a commonly used Optocoupler, it contains one IR LED and one photo transistor in its. of the optocoupler output. In this circuit the current I IL of the TTL input flows through the phototransistor in such a way that the following applies: IC = IL + IIL. This results in the following: To select the value for R L, the following should be observed. Proceeding from the voltage V IL = 0.8 V, the phototransistor is on the limits of. Circuit operation. A positive signal input causes the output of U1 to shift positive. This causes both LEDs to conduct. U3-B turns on and provides a positive going feedback signal. When both op amp inputs are equal, the output of U1 stops integrating. At the same time the output of U3A presents a positive going signal to U2

While testing my circuit at various input voltages I found that the opto will start giving fluctuating output when my voltage is 145V. I calculated the voltage and found that for 145V AC and a series resistance of 440K, the current is just 0.33mA which may to be insufficient to turn on the opto The Optocoupler is just a small-sized circuit of infrared receiver and sender but in case of making it with externally by using IR sender and receiver cause many problems. First manually made circuit comes in a larger size, then in case of IR receiving devices the circuit IR sender of auto coupler or receiver could be affected by other IR signals

This LED Optocoupler circuit uses two ordinary LEDs as the optocoupler element. When a voltage of 2V is fed to the input, LED 2 will generate a voltage that is strong enough to switch on transistor T5. The upper frequency limit is around 38 kHz. Very low pulse frequencies are almost meaningless for the circuit This animation depicts a simple example of an optocoupler of any type. However, we use 4N25 in this example. This circuit demonstrates LED controlling with a switch optically. At the input side, the logic signal probe provides a logic high-low signal to a photodiode. The phototransistor turns on and turns off according to a state of the logic. Optocoupler, Phototransistor Output, with Base Connection 4N35, 4N36, 4N37 Vishay Semiconductors DESCRIPTION Each optocoupler consists of gallium arsenide infrared LED and a silicon NPN phototransistor. AGENCY APPROVALS • Underwriters laboratory file no. E52744 • BSI: EN 60065:2002, EN 60950:200 4N35 optocoupler can be used for variety of general purpose requirements in electronic circuits. For example you can use it in electronic circuits to save the circuits, ICs and other components from voltage surge or voltage spikes which damages the components. Other than this it can also be used for isolation in electronic circuits

As far as the MOSFET is concerned, an optocoupler is just a transistor. As far as the microcontroller is concerned, an optocoupler is just an LED. So, all you need is a normal transistor-driven MOSFET circuit, and a normal microcontroller-driven LED circuit. Here's an example of driving a MOSFET with a transistor die optocoupler gaat een stroom uitsturen, het staat in de datasheet hoeveel stroom, normaliter stuur je deze stroom door een weerstand om een spanning op te wekken, je moet de weerstand zo kiezen dat I*R => V+ het relais moet je in ieder geval schakelen door middel van een transistor NI Multisim Live lets you create, share, collaborate, and discover circuits and electronics online with SPICE simulation include

Depending on your circuit you may need to add a resistor on the other side of the optocoupler as well. Test circuit. To get started and to make sure I had everything working before attaching the camera I created a test circuit. This is simply the optocoupler with an Arduino connected on one side and a LED and battery on the other 6N137 Optocoupler: Pinout, Circuit, Applications Author: Mia Date: 31 Dec 2020 254 The 6N137 is a single channel 10 Mbd optocoupler utilizing a high efficient input LED coupled with an integrated optical photodiode IC detector An optocoupler or optoisolator, is a device that contains a light-emitting diode (LED) and a photosensor ( photodetector, such as a photoresistor, a photodiode, a phototransistor, etc ).The purpose of an optocoupler is to transfer signals from one circuit to another yet keep them galvanically isolated.. Here I want to show you how to check if an optocoupler is working I need help with my circuit (optocoupler, transistor, relay) Need help hooking up an H11AA1 optocoupler to detect current in an AC circuit. Looking for review of circuit design - 24v AC through Optocoupler to 3.3v ESP8266: Volt drop across inverter is activating optocoupler circuit De optocoupler wordt gebruikt om een galvanische scheiding te maken tussen het ene circuit en het andere. Theoretisch kan je voor de transistor nog een optocoupler zetten. Normaal gesproken zal dat niet echt nodig zijn omdat het relais ook reeds voor een galvanische scheiding zorgt

Designing optocoupler circuit for arduino input

Optocouplers - Homemade Circuit Project

Method 1. Basic Audio Optocoupler. The circuit shown in Fig. 5.3.4, adapted from a design in Newnes Electronic Circuits Pocket Book by Ray Marston (ISBN 10:1-4832-9192-8) uses the 4N25 connected as a phototransistor to pass audio signals whilst isolating the input and output circuits. An LM324 op amp is used here to drive the LED input of the 4N25 2) Place the optocoupler on the breadboard so that is straddles the center of the board (see circuit diagram). 3) Connect pin 1 on the optocoupler to Arduino pin 2 in series with a 220-ohm resistor (remember, you're powering an LED inside, you don't want to burn it out). Connect pin 2 of the optocoupler to ground

Abstract: Experimental and analytical results for a highly linear, temperature insensitive, optocoupler circuit, will be offered, in a feedback arrangement, one GaP LED shines equally on two photodetecting diodes. Photon current generated from one detector is used for feedback control of nonlinear and temperature-sensitive LED light generator, while light-generated current in other diode. MOC3021 (TRIAC based OPTOCOUPLER used to control AC RMS voltage), FOD3180 (High-Speed MOSFET), Why to Use 4N25 OPTOCOUPLER. For understanding the use of OPTOCOUPLER consider: Case1: where you want to isolate LOAD CIRCUIT from CONTROL CIRCUIT I want to operate a relay through optocoupler as shown in the circuit. Can you suggest a transistor in place of bc547/bc557 to handle current up to 1.5amps,because I want to operate car relay which consumes current up to 1.5 amps. Thank yo An Optocoupler integrated circuit is an electronic component that links two individual electrical circuits using a light-sensitive optical terminal. Optocoupler IC Basically a photocoupler is a semiconductor gadget that utilizes a short optical path to link a signal from an electrical circuit to another

What is Optocoupler and How it works? - Components10

An optocoupler IC, also known as an opto-isolator or photocoupler, is a semiconductor device which is used to couple isolated circuits. Within an optocoupler you will find a light emitter and a light sensor. Optocouplers usually come in a semiconductor package, such as SOIC or PDIP. How does an optocoupler IC work I'm designing an optocoupler circuit whose output will be give to one of the arduino input pins. I need to know for what I C current of the optocoupler I need to design the circuit. I'm concerned with the power loss and want to keep it as min as possible

Optocouplers - Conra

  1. Vind de fabrikant Optocoupler Circuits van hoge kwaliteit Optocoupler Circuits, leverancier en producten voor de laagste prijzen bij Alibaba.co
  2. The circuit shown below is a typical circuit used for AC load control from microcontroller, one LED can be connected in series with MOC3021, LED to indicate when high is given from micro controller such that we can know that current is flowing in internal LED of the opto-coupler.The idea is to use a power lamp whose activation requires mains AC as opposed to a DC voltage
  3. Optocoupler or optical isolator are designed to electrically isolate one circuit from another while allowing one circuit to control the other. The usual purpose of isolation is to provide protection from high-voltage transient, surge voltages and low-level electrical noise that could possibly result in an erroneous output or damage to the device
  4. The circuit below is a typical optocoupler-based isolated flyback solution. Figure 1. Isolated Flyback Controller with Optocoupler and TLV431 Shunt Regulator. In figure, a controller is used to facilitate high voltage operation. This increases complexity over a monolithic solution, but allows the user to select an external.
  5. The circuit gain in Figure 1 around the TL431 is calculated from . Equation 1: Gain = Zfb/R1. Where Zfb is (Equation 2) Equation 2: And ω is the symbol for radians/sec. The optocoupler loop gain requires that the designer know the optocoupler's current transfer ratio (CTR). This gain is equal to (R6/R4)*CTR of the optocoupler (Equation 3.
  6. Use an optocoupler such as the 4N35. Connect the optocoupler's pin 2 through a 220Ω resistor with Arduino's pin 11, and pin 2 with Arduino's ground. Then connect your external circuit to pins 5 (collector) and pin 6 (emitter). You can also apply voltage to pin 4 (base) of the optocoupler to raise the gain (just like with a normal transistor)
  7. Optocoupler, Phototransistor Output, with Base Connection DESCRIPTION This datasheet presents five families of Vishay industry standard single channel phototransistor couplers. These families include the 4N35, 4N36, 4N37, 4N38 couplers. Each optocoupler consists of gallium arsenide infrared LED and a silicon NPN phototransistor

PC817 Optocoupler - Opencircui

Optocouplers symbols for use in electrical, pneumatic and hydraulic schematic diagrams. Available in SVG, PNG, JPG, DXF & DWG format Fuses, Sockets & Circuit Breakers . Circuit Breakers (2708) Circuit Protection & Circuit Breakers (5772) Consumer Units & Accessories (167) Electrical Installation Accessories (1589) Fuse Holders (1265) Fuse Tools & Testing (12) Fuses (4918) Fuses - PCB (2398) Lightning Protection (27 optocoupler's safety limits and compromise the insulation barrier. The overloading of an optocoupler's power supply can be protected by circuits like crowbar, clamping diode, and current limiting resistors. Overloading caused by high-voltage IGBT fai lure OPTOCOUPLER FEEDBACK DRIVE TECHNIQUES USING THE UC 3901 AND UC3903 Numerous techniques and devices are available to the designers of optocoupler feedback circuits. The more traditional approaches utilize either an adjustable shunt regulator like the TL431 device or an op-amp and voltage reference as the optocoupler driver When power is applied to the input circuit, the LED switches on, the sensor detects the light, closes the switch and initiates current flow in the output circuit, as shown in the image at right. Optocoupler operation. Image credit: REUK. As semiconductor devices, optocouplers may be manufactured as one of several different form factors

Video: Optocoupler: Its Types and Various - Circuit Diges

Implementing an Isolated Half-Bridge Gate Driver | Analog

How To Make an Optocoupler Tester Circuit At Hom

optocoupler are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for optocoupler i Coupler ® Digital Isolator Technology. Optocouplers are slow, power hungry, difficult to integrate with other functions and degrade over time. By contrast, i Coupler digital isolators offer an alternative to optocouplers by combining high bandwidth on-chip transformers and fine scale CMOS circuitry that improve reliability, size, power, speed, timing accuracy, and ease of use for designers Isolators - Optoisolators - Logic Output are in stock at DigiKey. Order Now! Isolators ship same da Find numerous efficient optocoupler circuit to perform voltage, switch controlling and other electronic functions. These optocoupler circuit are ideal power management components

What is Optocoupler and How to Check it Easily With

The 5.6kΩ resistor and the 220µF capacitor is forming the RC circuit we talked about before. The capacitor and resistor connection point are connected to the anode of the PC817 optocoupler which means that the PC817 anode pin will switch high and low every 1.2 seconds. In this circuit, the R1 resistor has two purposes 4N25 Datasheet, 4N25 PDF, 4N25 Data sheet, 4N25 manual, 4N25 pdf, 4N25, datenblatt, Electronics 4N25, alldatasheet, free, datasheet, Datasheets, data sheet, datas. 1. The well-established relay-driving circuit uses an optocoupler to isolate the grounds and noise coupling between the low-voltage digital-control signal circuit (left) and the relay as load (right) I chose to use an optocoupler, sometimes called an optoisolator. Optocoupler. There are many types of optocoupler and you chose one based on the requirements of your circuit. My circuit is a 5V Arduino and a Canon 40D which has about 3.2V on the shutter release. Due to the relatively low voltages there are many suitable optocouplers to pick from An optocoupler is designed to send an electrical signal between two nodes without an actual direct electrical connection via a conductive conduit. Since a signal is being transferred without a physical medium, the optocoupler creates an isolation in the circuit which is immune to very high voltage surges well into the thousands of volts

4N35 : 5 Steps - Instructable

Optocoupler demystified [tronixstuff], who has wrote a ton of arduino tutorials, has posted a detailed guide to one of the most useful electronic components, used to trigger many low-voltage circuits: the Optocoupler Optocoupler K.48 K Optocoupler - Overview Owing to the increasing degree of automation, the separation of potential between control circuits (control side / field side) is becoming increasingly significant. The connection between the controller, which is the key component of every automated sys

Optocoupler and Flyback diode in relay circuits

  1. English: A diagram of a simple circuit using an optocoupler. When the switch S' 1 is closed, the diode emits light and the transistor conducts. v' out thus goes low. This circuit therefore acts much like a logicalNOT gate
  2. al of the phototransistor externally available. In nor­mal use the base is left open circuit, and under such a condition the optocoupler has a
  3. De optocoupler wordt dan aktief als de uitgang laag wordt. Wil je het andersom, dan zal er een transistor aan te pas moeten komen. Prosper, yop la boum, c'est le roi du macadam (aldus Maurice Chevalier
  4. Aangezien als die 12V actief wordt, er een puls dient te komen naar mijn PIC die op het 5V circuit zit, had ik er een optocoupler tussen gezet. De 4N25. Nu die werkt perfect, het signaal komt erdoor. Maar geïnverteerd uiteraard. Als de 12V actief wordt(zie schema) dan heb je 0V. Dus heb ik er een extra transistor bc547 achter gezet
  5. the power circuit topology. In all cases the band-width and phase of the phototransistor can effect the stability of the power supply. It is the intent of this application note to present test data on circuit configurations which show improvements in the bandwidth performance of a common optocoupler. A test circuit, shown in Figure 2, was used t
  6. Optocoupler manufacturing techniques make it difficult to integrate multiple channels into the same package. The RF Approach We usually associate radio-frequency communication with long-distance systems, but there is no reason why you can't use it for (very) short-range applications such as digital-signal isolation

Optocoupler Input Circuits for PLC

CircuitLab provides online, in-browser tools for schematic capture and circuit simulation. These tools allow students, hobbyists, and professional engineers to design and analyze analog and digital systems before ever building a prototype Optocoupler module; Nominal input voltage: 24 VDC; Output voltage range: 0 24 VDC; Limiting continuous current: 0.1 A; Path; Module width: 6 mm; gray.

IC 4N35 OptocouplerOptoisolatore - Wikipediadriver for mosfet irf520n for boost converter

An optocoupler device facilitates on-chip galvanic isolation. In accordance with various example embodiments, an optocoupler circuit includes a silicon-on-insulator substrate having a silicon layer on a buried insulator layer, a silicon-based light-emitting diode (LED) having a silicon p-n junction in the silicon layer, and a silicon-based photodetector in the silicon layer An optocoupler (or optoisolator) is a device that galvanically separates circuits and is not only great at isolation but allows you to interface to circuits with different ground planes or that operate at different voltage levels I have the following circuit with the MOC 3052 Triac driver optocoupler: The diagram of the MOC 3052 has been made with respect to its datasheet. The two legs of the transformer are labelled T1 and T2. The green wire of the optocoupler has been connected to the Gate of the BT 139 Triac. Also.. An optocoupler, also known as an opto-isolator or photocoupler, is a semiconductor device which is used to couple isolated circuits. Within an optocoupler you will find a light emitter and a light sensor. Optocouplers usually come in a semiconductor package, such as SOIC or PDIP

Nihal Kularatna, in Modern Component Families and Circuit Block Design, 2000. 6.5 Driving High-Level Loads with Optocouplers. Frequently, a load to be driven by an optocoupler requires more current, voltage, or both than an optocoupler can provide at its output. Available optocoupler output current is found by multiplying the input LED current by the CTR An optocoupler (or an optoelectronic coupler) is basically an interface between two circuits which operate at (usually) different voltage levels. The key advantage of an optocoupler is the electrical isolation between the input and output circuits. With an optocoupler, the only contact between the input and the output is a beam of light I want to use an optocoupler for separating a circuit powered by USB (5V) from one powered by a 7.2V RC Car battery. The idea behind this is that I want to protect the USB based circuit(and my computer) from the large amperages, inductance, higher voltages and other things going on in the RC Car side of the circuit, but still want to be able to control it using a USB device The circuit is just for me to simulate the the iconic hysteresis-loop of a memristor, the output will be the current that passed through the optocoupler. I've been getting weird result not knowing a transistor-based optocoupler will be different from the resistor-based optocoupler, hence I'm here trying to rebuilt the circuit using Ltspice

4N35 Transistor Optocoupler - 5 stuk

Optocoupler - Transistor Output - Electronic Symbols. JIC / NFPA Sample Drawing; IEC 60617 Sample Drawin optocoupler circuit. The con- duction current of the pho- totransistor can be controlled by the forward bias current of the IRED although the two de- vices are separated. When S1 is open no current flows In the IRED so no infrared energy falls on the phototransistor, making it a virtual open-circuit with zero voltage developed acros What is an Optocoupler and How it Works By Megan Tung An optocoupler (also called optoisolator) is a semiconductor device that allows an electrical signal to be transmitted between two isolated circuits. Two parts are used in an optocoupler: an LED that emits infrared light and a photosensitive device that detects light from the LED. Both parts are contained within a black box with pins for.

Using Opto Couplers - Learn About Electronic

De ontvangende optocoupler heeft geen voeding nodig en is daardoor de helft goedkoper. ilCigno: productreclame verwijderd. Onno Harders eigenaar van www.boatcontroller.nl en www.pcnautic.nl Prutsen is de meest onderschatte fase van een creatief proces Laatst bewerkt: 21 nov 2017 16:01 door ilCigno motor control circuits to data communi cation and digital logic interface circuits. To help you choose and design with Avago Technologies isolation components, this Designer's Guide contains popular application circuits and recommended Avago optocouplers. This handbook contains sections discussing critical op The optocoupler outputs replace a switch in the second circuit. If the second circuit does not have a switch, then there is no use in having the optocoupler. Note that a 4N35 is only intended for DC circuits (not AC) unless other parts are added There are various types of opto isolators which are classified based on various criteria such as number of channels, isolation voltage, type of packing, output voltage capacity, current transfer ration (CTR), and so on.. Opto Isolator Circuit. As we discussed earlier in this article, source and sensor of opto isolator are used for transferring the signals

Optocoupler simulation. 4. 0. 406. 11:00:14. published 6 years ago add comment in editor. EveryCircuit is an easy to use, highly interactive circuit simulator and schematic capture tool. Real-time circuit simulation, interactivity, and dynamic. The TLP250 - Optocoupler : Transistor Inverter PhotoCoupler consists of a GaAiAs light emitting diode and a integrated photo-detector. Its a 8-pin DIP package IC. TLP250 is suitable for gate driving circuit of IGBT or Power MOSFET appliances, etc An opto-coupler is a device that can be used to electrically isolate two circuits, so that a voltage spike or other problem on one side will not destroy the circuit on the other side. A common use for them is when you want to interface a computer to an AC-powered device, such as a light or a motor. Usually, the opto-coupler will not be used to control the device directly, and instead will just.

Public circuits tagged optocoupler - CircuitLa

Broadcom's optoelectronics are designed and manufactured to meet the stringent power isolation requirements of industrial applications Each optocoupler consists of gallium. 4N35 is an optocoupler integrated circuit in which an infrared emitter diode drives a phototransistor. They are also known as optoisolators since they separate. Optocoupler, Phototransistor Output, with Base Connection. DESCRIPTION families include the 4N35, 4N36, 4N37, 4N38 couplers An optocoupler circuit includes a switch connected in parallel with a photo LED, the photo LED having an anode and a cathode. The anode is connected to a power supply via a decoupling capacitor. The optocoupler circuit is arranged so that the switch turns on the photo LED when in the open position. When closed, the switch directs current flow through a series resistor to ground and shunts. High Speed Optocouplers are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for High Speed Optocouplers Optocoupler is an electronic component that is used to transfers electric signals between two separate circuits. Optocoupler is also known as Opto-isolator, photo coupler or optical isolator. Often these are used in the low voltage or highly noise sensitive circuits

Optocoupler ic in Hindi !! Opto Coupler How its Works andBuy 4-Channel Relay Module - 12V Online in India | FabCircuit Board With Many Electronic Components Stock Image
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